HomeMy WebLinkAbout11-22-1999 Council Work SessionI
I
I COUNCIL WORK SESSION
5:00 P.M., MONDAY, NOVEMBER 22,1999
AGENDA
1.Review of DRAFT Comprehensive Plan Part 4(C): Comprehensive Sewer Policy Plan,
2.Schedule and topics for upcoming work sessions.
3.Other.
To:Mayor and Council
Planning Commission Members
Ron Moorse, City Administrator
From:
Date:
Subject:
Mike GafTron, Senior Planning Coordinator
November 19,1999
Monday November 22 Work Session - Comprehensive Plan Discussion
Topic: Review of Comprehensive Sewer Policy Plan (CSPP)
Attachments:
1 ' Draft Overall Table of Contents/Outline
2 - Draft Update of 1980 Plan, Section 4(C): Comprehensive Sewer Policy Plan (CSPP)
The attached draft of the CSPP uses the existing 1980 Comprehensive Plan CSPP as a base
document. The content has been updated, and rearranged for the sake of clarity. Most sections have
been redrafted, a few still need updating. This is a rough draft.
It would be helpful if Council and Planning Commission members review this draft prior to the
November 22 work session, and note or highlight any sections that you wish to discuss. Please
carefully review the following sections, and consider whether they reflect your expectations and
goals for the City:
CMP 6-5 thru 6-7: Summary ’ of Sewer Policies. You have seen this section previously; does it
adequately summarize your general thinking?
CMP 6-12: I he population projections have been updated in the last few weeks to reflect
additional density of development in the Highway 12 area as discussed at previous work sessions...
CMP 6-17 thru 6-23: Sewage Treatment Goals and Policies. These have been embellished to
make it clear that Orono h-’s 1) an Urban Service Area defined by allowed density; 2) a Rural
Ser>’ice Area also defined by allowed density; 3) and a “Metropolitan Urban Service Area”
(MUSA) that merely defines the areas we wish to have municipal sewers, which includes all of our
Urban Service Area, and may include some of our Rural Service Area. It stresses that MUSA
designation does not ntccssarily mean we will provide other urban-level services...
CMP 6-24 thru 6-31: Rural Sewage Treatment Policy Plan. This section has been updated to reflect
changes in the state of septic system management since 1980.
CMP 6-32 thni 6-40 : Existing Sewage Treatment Facilities. Update of this section has not been
totally completed, but reflects many changes to Orono sewer systems since 1980.
I
I
I
I
I
I
r •
f •
f •
y
CMP 6»41 thru 6-53 : This is the most important part of the CSPP, as it identifies our expected
capacity needs through year 2020. This section has necessarily undergone significant revision.
A key point is shown in the table at the top of page 6-43a. Our projected flows, even with all the
planned new higher-density development along Highway 12, are not expected to exceed Met
Council’s forecast flow' rates for years 2000-2010-2020. We will be near the forecast capacity ’ in
2010 assuming Highway 12 development proceeds within the next 10 years.
This section will also provide an indication of what system improvements we expect over the next
20 years. A section reviewing the short-term and long-term capacity needs and solutions in the
Highway 12 area will be drafted shortly.
Appendices
Appendix A: This section contains breakdowns of where and when we are projecting new
connections to the sewer system.
Appendix B is an update of City' ordinances affecting administration of sewage treatment programs.
Appendix C will discuss new sewer construction standards and discuss our program for inflow and
infiltration (I/I) reduction.
Please feel free to call me Monday if you have any questions prior to the meeting!
Part 1.
Part 2.
Part 3.
Part 4.
Orono 1999 Comprehensive Plan
Draft Table of Contents / Outline
October 1999 I
Introduction
Purpose - Title - Scope - Overview - Plan Organization
Basis for Plan
A. Community History
B. Community' Profile
C. Community Philosophy
D. General Goals and Policies
The Urban Area
The Rural Area
Comprehensive Planning Strategy
I
Land Use ^
A. Environmental Protection Plan
The Natural Setting
Surface Water Management. ;an
(Stormwater Management,Wetland Preser/ation)
Shoreland Management
T ree Preservation
Quality of Life Preservation_______ .
TO ite-
7t+^ • /UCV'f M&Ct
B.General Land Use Plan
Basic Land Use Concepts and Principles
Land Use Goals and Policies
The Land Use Plan
(Residential Areas; Comracicial/Industrial Areas; Areas Proposed l
■fo r Cha ngeiDeydopment Staging)__—. ___
/
fr-
c.
D.
E.
Housing Plan
Basic I lousing Concepts and Principles
Summary of Existing Housing Statistics
Metropolitan Livable Communities
Housing Improvement Goals and Policies
Housing Improvement Plan
Historic Site Preservation Plan
Solar Access Protection Plan
^ !
Public Facilities A Services
A. Transportation
Basic Transportation Concepts and Principles
Land Use Impact on Transportation
Traffic Volume Forecasts
Highways and Streets
(Urban; Rural)
Right-of-Way Pseservation and Access Management
The County Road 15 Corridor
The Highway 12 Corridor
The Ring Route Concept
Transit and Transit Corridors
Bicycle and Pedestrian Facilities
Street Maintenance Program
I
I
I
r
i
r
t •
# ‘
I
p *
Parts.
Part 6.
Part 7.
B. Aviation
C.Sewer
General Airspace Protection
Aviation Support Facilities
Seaplane Lakes
Heliports
Basic Sewage N;eaunent Concepj^nd Principles I
Urban Sewage Treatment PoUp/Plan
Rural Sewage Treatment E«mcy Plan
ISTS Managemjk(Program I | ^
seft- ^e4fV/S^ I
D.
E.
F.
Projections/FoiecMl^ncn^nned Land Use
Existing Sewerp^ilities
Projected Sey<er Facilities N.
InfiltratiopHnAow Management N
Water Supply (Incorporate Existing Plan, Update as Necessary)
Water Supply Description and Evaluation
Emergency Planning
Water Conservation Plan
Metro Area Impacts
Parks and Open Space
Inventory of Existing Local and Regional Facilities
Needs Analysis
Capital Improvement Program
Land Use and Open Space Preservation
Public Services
Public Safety Services
Public Education
Government Agencies and Services
Private Owned Utilities and Services
(Namral Gas; Electrical Service; Telephone; Wireless Communications;
Cable Television; Management of Utility Conduits; Sanitation)
City Owned Land and Facilities
Citv Administration
Implementation
A. Comprehensive Plan
B. Ordinances and Controls
Philosophy on Variances
C. Capital Improvement Plan
Intergovernmental Coordination
Inventory & Background Data
A.Natural Features D.Housing
B.Population and Growth E.Sewers
C.Land Use F.Roads and Utilities
Appendices
Index (Index to Maps; Index to Figures and Tables; Topic Index)
Bibliography
Documents
CHAPTER 6
PART 4(C)
COMPREHENSIVE SEWER POLICY PLAN
PARTIAL DRAFT 9-1-99
REVISED DRAFT 11-19-99
CMP 6-1
I
I
I
I
% •
• •
TABLE OF CONTENTS (DRAFT)
PART 4(C)
COMPREHENSIVE SEWER POLICY PLAN
Introduction
Scope
Summary of Sewer Policies
A. General Sewer Policies
B. MUSA Expansion Policies
Basic Sewage Treatment Concepts and Principles
Community Management Plan;l‘,npacts on Sewer Planning
Sewage Treatment Policy Plan
Basic Sewage Tre?* rnent Goals
Urban Sewage Treatment Policies
Rural Sewage Treatment Policies
Cooperative Sewage 1 reatmcnt Policies
Rural Sewage Treatment Policy Plan
I STS Management Program
I STS Ordinances
Existing Sewage Treatment Facilities
A. Metropolitan Facilities
B. Municipal Facilities
Sewer Facilities Plan
Appendices
CMP 6-2
CMP 6-3
CMP 6-5
CMP 6-6
CMP 6-8
CMP 6-13
CMP 6-17
CMP 6-17
CMP 6-20
CMP 6-23
CMP 6-24
CMP 6-25
CMP 6-28
CMP 6-32
CMP 6-36
CMP 6-41
INTRODUCTION
This Comprehensive Sewer Policy Plan (CSPP) is a refinement and updated version of th e 19?7
Orono's 1980 Comprehensive Sewer Policy Plan pr ep ared by Orono and submitted for interim
MWee and Metro p ol itan Counci l review, and reflects a number of changes and updates of that plan .
This Plan reflects th e pri or eommitments and comments responds directly to of the Metropolitan
Council's December 1996 Water Resources Management Policy Plan bv focusing on watershed
management to control pollution from both point and non-point sources. This Plan also defines
Orono's future intent regarding the location of the City's Urban and Rural Service Areas and the
Metropolitan Sewer Service Area as defined hv the MUSA. This Plan reflects the final location and
design criteria of th e Orono *Lon g Lake Intercep to r as const ructed in 1979. current and planned
service areas and capacities for the various portions of the Metro interceptor system which serve
Orono and its surrounding communities.
This Plan is prepared and presented for three distinct, interrelated purposes:
1. The CSPP is intended to be a management tool for City officials,City staff, and other
parties involved in management, operations and policy decisions concerning sewage collection
and/or treatment in Orono.
For this purpose, the CSPP contains gvial and policy statements consistent with the overall planning
objectives of the City; it contains an inventory of existing facilities, capacities and design
parameters; it reviews environmental and land use .considerations; and it includes plans for capital
improvements, administration and enforcement.
2. The CSPP is the sewer service clement of Orono’s Community Management Plan,
designed to address and conform to all the applicable provisions of the Metropolitan Council's
nevelopi Hewf Framewarit Guide Regional Blucnrint and Water Resources Management Plan.
For this purpose, the CSPP’s inventory' and planning considerations include sufficient detail to
explain how Orono's plans and facilities arc consistent with those of neighboring municipalities and
with the Metropolitan facilities of the region as a whole. This purpose and content is consistent with
the City's Community Management Plan, with the requirements of the 1977 Mandatory Metropolitan
Land Planning Act and with the local "systems statement" issued to Metropolitan Council's Water
Resources Management Plan Orono b y the Metropolita n Ceunetl.
3. The CSPP is th e compre h ensive sewer p lan required b y the Metrop olitan S ewer
Act; designed to advise the Metropolitan Waste Control Commwaion Council of Orono's
detailed needs for metropolitan facilities capacity.
For this purpose, the CSPP includes a determination of Orono's ultimate Sewer Service Area, the
anticipated staging of expansion of the Sewer Service Area, and a review of the expected flow rates
from within that area. The CSPP also includes discussion of the plans, programs and controls in
effect to assure adequate, permanent, trouble free on-site sewage treatment outside of the Sewer
Service Area.
I
I
I
CMP 6-2
I
I
I
r
t
I
I
I
I
I
I
L
SCOPE
The content of the CSPP is intended to be sufTiciently complete so as to address the separate
needs of the City, the Metropolitan Council, and the Metropolitan Waste Control Commission
Council Environmental Services division.
An attempt has been made to include all of the background data and issues which relate to sewer
system operations and planning, including brief summaries of land use plans and planning
philosophies of the City. For more detailed discussions ofthese related issues, the reader is referred
to the other appropriate chapters of the Community Management Plan.
Orono's CSPP will perform the following functions:
Review, evaluate and consolidate other planning policies and engineering reports into an
updated Comprehensive Sewer Policy Plan consistent with other elements of Orono's
Community Management Plan.
2. Evaluate surface water drainage districts and their impact on sewage treatment.
3. Inventory all e.xisting public and private sewage treatment facilities.
4. Review' and incorporate community development plans with future sewage treatment needs.
5. Provide design data for metropolitan interceptor capacity.
6. Provide design guidelines for rural sewage treatment.
7. Evaluate existing ordinances and controls including recommendations for changes.
8. Evaluate existing administration and enforcement practices including recommendations for
changes.
The time framework of the CSPP is intended to be consistent with the regional planning period
of 4988 2000 through 4998 2020, with MWCC^s programs through the year 2888; with the
Water Resources Management Plan projections through 2020, and with the City's permanent
planning programs for rural Orono.
Tlie goals, policies and facilities plans contained in the CSPP are set in the context of the legislative
mandate to plan for regional needs through the year 4998 2020 and beyond . These statistics and
programs are particularly primarily applicable to the urban areas of Orono and to the municipal
sanitary sewer facilities which serve or are planned to serve these areas.
On the other hand, Orono’s long range land use plans call for permanent maintenance of the existing
low density rural residential areas. There is to be no staged growth plan for conversion of low
Jensitv residential uses to higher density residential uses, and no expansion of the existing urban
serv ice area w ill occur only w ithin a few specifically planned areas. Therefore, the goals, plans and
programs for on-site sewage treatment in rural Orono are intended to be permanently self-sufficient
H-iffy tttp future thmimtf tm reghttal va/uteity. Potential future demands on regional capacity will
CMP 6-3
be primarily from the retrofitting of existing rural residential neighborhoods where sewer is readily
available and where residents are willing to pav the costs associated with its installation.
Consequently, the definition of the Metropolitan Urban Service Area and the sewer facilities plans
for rural Orono are intended to be permanently applicable beyond the arbitrary planning date of4990
2020. This fact is particularly important to the many Orono citizens who are making investments
based on this permanence and who are entitled to know that they can rely on the City's plans.
I
I
I
~1
^ 4 J
I
I SUMMAR Y OF SEWER POLICIES
I
I
I
I
I
I
I
D
A, GENERAL SEWER POLICIES
L, In order to protect Lake Minnetonka from the severe negative impacts of excessive
stormwater runoff that would be generated bv development densities in excess of 1 home per
2 acres. Orono will not allow widespread residential development at densities greater than 1
home per 2 acres.
2j, The areas of Orono designated to remain at for develop at) a density' of I or more homes per
acre, and those areas designated for commercial or industrial uses, are designated as the
Urban Service Area and comprise approximatelv22% of Orono's land area.
The primary method of sewage treatment and disposal within the Urban Service Area will be
municipal sewer.
The areas of Orono designated to remain at (or develop atl a density of 1 home per 2 acres or
I home per 5 acres are designated as the Rural Service Area and comprise approximately
78% of Orono's land area.
^ The primary method of sewage treatment and disposal within the Rural Serv ice Area will be
individual on-site systems, because:
a. The cost of providing municipal sewer service to the Rural Service Area is high due to
the low density of development and due to the varied topography.
k Development of the Rural Service Area at densities which would keep the cost of
municipal sewer low, would be counterproductive to the City’s intent of protecting Lake
Minnetonka.
^ The Rural Service Area includes lakeshorc areas as well as non-lakeshore areas, and includes
pre-existing pockets of hicher-densitv development which have been (or may be) provided
with municipal sewer.
While specific neighborhoods w ithin the Rural Service Area may be pro\ ided w ith municipal
sewers to solve existing sewage treatment problems, or to protect sensitive lakeshore areas,
these served areas will not be provided with other general urban services: extension of
municipal sewer to a Rural Service Area neighborhood will not result in its conversion to the
Urban Service Area.
^ The Metropolitan Urban Service Area tMUSA> boundary in Orono will define areas where
sewer exists or where it mav be extended to ser\ e existing or new development, but will not
define the areas where general urban services will be provided, and it will not define the
boundary' between higher density and low-densitv development.
9. Orono will provide municipal sewer extensions to lakeshore areas and non-lakeshore areas
within the MUSA when it is determined that municipal sewer is preferable to long-term use
of on-site sew age treatment systems.
CMP 6-5
T
I .
10. The costs of extending municipal sewer to existing neighborhoods will be borne primarily hv
the property owners being served, but may be partially home bv the general taxpayer where
the costs of sewer are excessive in relation to property values.
11. The costs of extending municipal sewer to serve new residential and nonresidential
development will be home entirely bv the developer.
12 Municipal sewer will be extended to recently-defined areas alonn and near the Highway 12
corridor where higher density residential development (I or niore homes per acre') is planned.
The City recognizes and acknowledges that existing and continued development at densities
of 1 home per 2 acres and I home per 5 acres will not accommodate the density of population
currently being accommodated in adjacent 2nd-ring suburbs such as Plymouth and
Minnetonka. The City further acknowledges that the inability to accommodate a high
populP ’i':.n in Orono due to environmental constraints mav result in the need for what
Metropy-:'f.tn Council mav deem as "premature" extension of sewer interceptors through
Orono to d^'-nv for added populations further west. This is the cost of protecting Lake
Minnetonka as a premier recreational resource. To allow the degradation of Lake Minnetonka
bv forcing high density development to occur throughout Orono. would be simply 'robbing
Peter to pav Paul*.
B. MUSA EXPANSION POLICIES
J_. Orono has e.xpanded the MUSA boundary into the Rural Scr\ice Area on a number of
occasions since 1980 to allow retrofittine of existing neighborhoods with municipal sewer.
Most of these neighborhoods were historically developed at densities greater than I home per
2 acres, or were located on the lakeshore. All such neighborhoods were studied prior to sewer
installation to determine the feasibility of long-term use of septic systems. In each case the
City concluded that municipal sewer was the most appropriate permanent sewage treatment
solution.
2. This 2000-2020 CMP will immediately expand the current (1999) MUSA bv
approximately 325 acres to accommodate the following:
a. Expansion of opportunities for higher density residential development along Highway
12 and adjacent to or abutting the City of l.ong Lake.
^ Incorporation into the MUS.\ of most remainimi non-MUSA Lake Minnetonka
lakeshore properties to allow their development or retrofitting with municipal sewer.
c. Incorporation of certain properties ^•■■hich have been provided with municipal sewer
under an agreement between the City and Metropolitan Council which allowed up to 50
seuer connections for properties which were not within the MUSA but were adjacent
to existing municipal sewers.
CMP 6-6
I
I
I
J
I
I
J
I
I
I
3. While the City has no staged development plan, staging of future MUSA expansions is
established as follows:
The RR-IA S-acre zoning district, plus the additional areas of northwest Orono
encompassing Hennepin Countv Park Reserve District’s Baker Regional Park, will not
be incorporated within the MUSA during the planning period 2000-2020.
^ The remaining 2-acre single-familv LR-IA Lakeshore Residential and RR-IB Rural
Residential zoning districts of western, north central and northeast Orono mav be
incorporated into the MUSA during the planning period 2000-2020 under the following
• •priority system:
Priority 1
Priority 2
Properties that abut the shoreline of Lake Minnetonka and all other
Orono lakes.
Properties that abut City-protected tributaries, and all other properties
within the Shoreland Qyerlav District.
Priority 3
Priority 4
Substandard developed lots not covered by Priorities 1 and 2.
New development using clustering that permanently preserves blocks
of open space.
Priority 5 Conforming developed lots not covered bv Priorities 1 and 2.
Priority 6 New development not covered bv Priorities 1. 2 or S.
4. Expansion of the MUSA on the established prioritized basis will occur only when one of the
following conditions is found:
a. When an area of existing homes has failing or non-conforming septic systems and
replacement drainfield sites are not available for a significant share of the existing
homes.
b. When an individual home has a failing or non-conforming septic system, does not have
an alternate drainfield site, and is adjacent to existing sewer lines.
c. When a new residential development meeting all required development standards is
adjacent to existing sewer lines and the developer agrees to bear all costs of extending
municipal sewer to the development.
^ The Metropolitan Council in 1996 granted the Citv SO sewer connections for existing
developed properties near existing sewer lines but outside the MUSA. The City has established
criteria for apportionment and use of those units based on condition of e.xisting septic system:
proximity toexisting sewer lines: and capabilin-for replacement ofexistingseptic system. The
City w ill from time to time review and revise as necessar\' the criteria established for use of
the 50 units. Additionally, from time to time the Citv w ill incorporate into the MUSA the
properties making use of the 50 units.
CMP 6-7
BASIC SEWAGE TREATMENT CONCEPTS AND PRINCIPLES
The Comprehensive Sewer Policy Plan is an integral part of Orono's Community Management
Plan. Although the statistics and detailed policies apply specifically to this one element of
community planning, the overall goals and objectives have been derived from joint and
concurrent consideration of all community planning elements. Therefore, the policy decisions
relating to Orono's sewer service area and facility capacity requirements complement and
balance regional plans with local concerns for historic development patterns, environmental
protection, public health, fiscal responsibility and general land use.
The basic responsibility of the City is the protection of its citizens' health, safety and welfare.
In terms of sewage treatment, this means that effluent from all occupied premises must be
adequately contained, treated and disposed in order to prevent the spread of disease. This goal can
be accomplished in a number of technically acceptable methods including in cin eratin g or
composting commodes, recyc lin g systems, traditional or innovative septic tank and drainfield
systems, package plants, incinerating or composting commodes, recycling svstems.or municipal
collection and olT-site treatment.
Each system has its own advantages and disadvantages and should be evaluated for its merits in each
circumstance. There is no particular health advantage of any system over any other provided due
care is taken to assure satisfactory final treatment. In addition to the proven technologies using soil
treatment systems for on-site wastewater treatment. MPCA Rules Chapter 7080 and its ongoing
revisions provide for a number of new and innovative technologies not reiving solely on soil
conditions, and provide system performance criteria to assure adequate sewage treatment.
A principal goal of Orono's planning program is the protection of natural resources and
environmental amenities, particularly the water qualitv ’ of Lake Minnetonka. The major
pollutants affecting Lake Minnetonka are contained in sewage effluent and storm water
runoff. Orono's sewage treatment policies are directed at minimizing or eliminating both
pollution sources.
Municipal sanitary sewers have been installed in the urbanized areas of Orono w'here land use
density is highest and where proximity to lakeshore and groundwater preclude effective alternatives.
The existing facilitieshavesufficient capacity to accommodate infill development ofexisting vacant
properties consistent with expected population increases. Major redevelopment to higher urban
density, or expansion of urbanization into the rural area, will not occur because of the proximity to
L.ake Minnetonka and the resultant unacceptable increase of pollutants contained in the storm water
runoff as well as the increased quantities and speed of the direct runoff.
Lake Minnetonka is replenished solely from storm water runoff, over one third of which flows
through the natural filtration system of Orono's rural marshland. In these rural areas, Orono's land
use policy is designed to integrate low density residential uses in and among the natural woodlands
and marshlands. This density is keyed to the findings of Eugene Hickok in his 1973 Storm Water
Impact Investigation prepared for the Metropolitan Council. Careful system design and an effective
management program assures proper on-site sewage treatment, recycling of water resources and
preservation of the natural marshland filtration system.
CMP 6-8
I
I
I
Orono's urban and rural areas provide distinctly different lifestyles, amenities and services
ivhich jointly benefit the community as a whole. Each area has separate planning priorities and
separate environmental considerations. Urban areas and urban services will not be permitted
to encroach on or destroy the rural community.
Historic development patterns established 100 years ago are responsible for the dual personality that
characterizes Orono. The lure of the Lake drew summer residents and resorters who established the
crossroads of Navarre, which continues to this day as the commercial center of Orono. Likewise,
away from the Lake, Orono has developed slowly as a farming or rural residential community of
agriculture, woodlands and open space. While the rural estate lifestyle has overtaken a significant
portion of Orono's agricultural lands.Tthe lakeshore and rural estate lifestyles are different, the needs
and desires of the citizens are different and the requirements for public services are different.
Orono ’s urban areas provide ample opportunity for a vast spectrum of housing opportunities and all
of the neighborhood services necessary to support the residents of the City, urban and rural alike.
These areas are provided with ty pical urban ser\ ices including sanitary sewer necessary to serve the
historic developed density, typically ranging from one to three homes per acre.
Orono ’s rural areas provide the opportunity fur low' density housing at affordable prices, orchards,
greenhouses, hobby farms and recreation areas not possible in either urban areas or in commercial
agricultural areas. This low density of land use is particularly valuable as a protection for the
marshlands, woodlands and other natural resources that dot the area. Here, individual sanitation is
accomplished with on-site sewage treatment facilities carefully designed and monitored to assure
adequate sewage treatment and complete environmental protection.
Orono ’s projected population increase can be comfortably accommodated within the existing zoned
densities of the urban and the rural areas without requiring anv significant increases in urban service
capacity or any decrease in environmental protection or the rural sense of community .
Orono's planning programs have long recognized the Development Paradox, or Urbanization
Spiral, which often ro.siilts from arbitrary planning assumptions or from incomplete analysis
of planning alternatives. The most striking example in Orono's situation is the documented
evidence that over extension of sanitary sewers, ostensibly to solve a pollution problem, can
easily in itself cause irretrievable water quality* degradation of Lake Minnetonka.
In the 1950's increasing urbanization all around Lake Minnetonka threatened to environmentally
"kill" the Lake by uncontrolled discharge of nutrients. Lake area municipalities began e.xtending
sewer systems to eliminate individual septic sy stem discharges, but by 1968, lake water quality was
still diminishing. The Minnesota Pollution Control Agency, together with the Lake Minnetonka
Conservation District, commissioned a study of lake pollution. Completed in 1971. the "Harza
Study" (A Program for Preserving the Quality of Lake Minnetonka) found that this nutrient input,
particularly phosphorus, was being generated from two principal sources: the seven municipal
sewage treatment plants and urban storm water runoff.
The first major pollution source, nutrient-rich effluent from the sewage treatment plants, has been
was systematically eliminated by multi-millon dollar construction of regional sew*er interceptors to
retnvwe eflluent from the watershed. But storm water runoff is a different matter. Unlike point-
source sewage pollution, there is no eeonom ieally practieal Nvay to artifieially-eoHcct or treat non -
CMP 6-9
i
pain t aou ree ato fm water p ollution, methods for collection and treatment of non-point source
stormwater runoff pollutants are extremely expensive and often impractical.
LAKE POLLUTIO\’
NON-PONT SOURCi
INCREASED HARD COVER
MORE RUN-OFF
MORE POLLUTANTS FROM
LAWN FERTILIZATION,
VEHICLE exhaust ,
OE-ICEING, AND STREET
SWEEPING
LAKE POLLUTION
PONT SOURCE a
IMMINENENT
HEALTH HAZARD
LAND SUBDIVISION
TO SPREAD UNIT
COSTS OF ASSESS
MENTS
ALTERNATIVES STUDIED
SEWER EXTENSION
■ ORDERED
PROPERTY ASSESSMENTS
POSE finanoal burden
DUE ro SPECIAL CONSTRUC
TION IN wetland terrain ,
LARGE LOT ACREAGE AND
SCATTERED DEVELOPMENT
THF. URBANIZATION SPIRAL
Illustrates the Development Paradox that faces Orono
if municipal serv ices are extended into rural areas.
The development paradox is that if municipal services are extended into rural zones, the cost of these
serv'ices ta.\es the land to the point that development is required. Particularly in the case of sewers,
even if extended to e.xisting pockets of development "to solve a pollution problem , inflation,
topography and sparse settlement combine to send cost skyrocketing. Such costs can be paid only
by increasing developmenL w hich in turn causes density increases, loss of w etlands and increasing
levels of storm water nutrient pollution. This spiral effect results in statistically even greater levels
of pollution than the original sewage "problem" might have been. For example, Eugene Hickok's
1973 Storm Water Impact Statement identifies up to ten times more phosphorus alone from urban
storm water runoff than from Orono's existing rural land use.
CMP 6-10
I
I
I
1
1
1
1
1
r
r
I
I
I
i
i
• «
One need only look to the ease example-of L-akc-Calhoun in Mmneapolis. There has neve r been a
drop of sewage effluent-running into Calhoun. but the lake ia suffering aeve fe-poHution from high
leve ls of nutrients eontained in the storm w ster runoff from the densety deve loped watewhed. Storm
water nutrient pollution from the urban runoff ovenvhelms the natural life system of the lake and
results-inaeeelerated emrophieation.
The cost of solvin g this problem, either filtering or rerouting the storm water, has eenststcntly been
judged too ex pensiv e'forCalhounrTheiwshefthc^amc solutions on the SO times large r Minnetonka
lendation of many studies as already incorp'^'-ated in State
PCA and DNR peHev oolrciesin the Jl970's is was that lakeshore density be limited and that the
natural system of wetland'^andjpgfshes be forever protected and preserved as the only practical,
economic method of filtering nutrients from storm water runoff.
In response to the above concerns, Orono in the 1970 ’s became has become a nationally recognized
leader in espousing environmental protection. Land use planning since the I950's has stressed the
environmental advantages of low- density development. Shoreland- wetlands and natural drainage
systems have been preserved by tradition and by ordinance. Compreiiensive Planning was underway
by the mid 1960's. In 1974, the first published Plan, as approved by the Metropolitan Council,
established as its foremost guiding principle the protection and preservation of Lake Minnetonka and
its associated wetlands.
Hard decisions have been were made bv the Citv' of Orono in the I970's to limit the extension of
bii. densome urban services into rural areas. Enforcement of these policies as an interrelated package
has been consistent and effective.
These practices and policies were developed by Orono citizens and they have been consistently
supported by Orono citizens and by environmental spokesmen nationwide. Development in Orono
is continuing to provide new housing and employment opportunities as it has for over 100 years, but
it is now managed better than ever to assure the health, safety and water quality preservation so
important to ail Lake Minnetonka area residents.
Recent changes in national priorities, population trends, metropolitan plans and metropolitan
facilities reinforce the planning and development objectives of Orono.
The I950's and 1960's were years of great expansion and reliance upon the powers of science and
industry to solve all problems. Population graphs showed growth projections running off the paper.
Suburbs boomed while core cities were fighting for their very surv ival.
The I970's brought a new environmental awareness and an understanding that nature, not science
was the key to our planet's survival. New social concerns revived the cities and showed how
characterless the suburbs had become. Inflation and population stabilization brought unlimited
expansion to a halt as roads, schools, and all public services began scrambling for maintenance
dollars while overbuilt facilities quickly became terrible taxpayer burdens. The cost of energy-»
dramatically refocusing dramatically refocused everjone's attention on conservation and careful
planning of any new facility.
f •
CMP 6-11
E
The result of these changes on the Twin Cities region and on Orono are were significant. Orono's
ultimate population projections have been dropping from estimates of 37,000 made in 1970, to
23,000 in 1972, to 14,000 in 1974, to the Metropolitan Coune il'a moat recent figure of 11,000 made
in 197*’*. to the most recent projections of iust under 9.000 based on current planned densities . This
figure is ver>’ close to our e.xisting population of 7?300 approximately 7.800. ta still prob ably high
considering the new energy problems and our rcecnt-groNvth trends, and would be easily obtainable
within our e.xisting zoning densities.
ORONO POPULATION PROJECTIONS (November 1999)
Population Forecasts
Year 1970 1980 1990 2000 2010 2020 Saturation
Urban Area (1/2 & I ac.)4,160 3,995 4,135 4,115 4,950 4,900 4,925
Rural Area (2 & S ac.)2,627 2,850 3,150 3,685 4,100 4,400 4,450
Total City 6,787 6,845 7,285 7,800 9,050 9300 9375
Occupied Household Forecasts
Year 1970 1980 1990 2000 2010 2020
Saturation
Urban Area (1/2 & 1 ac.)1,316 1,337 1,483 1,491 1,900 1,950 1,975
Rural Area (2 & 5 ac.)830 954 1,130 1,335 1,500 1,750 1,775
Total City’2,146 2,291 2,613 2,826 3,400 3,700 3,750
Sources: U.S. Census; Metropolitan Council forecasts; City records and forecasts.
*Does not include vacant dwelling units
Future trans portat ion pla ns ha v e been cha nged as commuters mov e in toward the center city. The
Stat e of Minnesota ha s droppcd-plans for relocat ing a nd expa nding Highwa y 12 through Orono
whi le Regional transportation needs have resulted in the planned bypass of Highway 12 around
much of the Cits’ of Long Lake and through Orono. to allow a free flow of commuter traffic between
Minneapolis-St.Paul and the developing cities and counties west of Orono. At the same time.
environmental and social pressures have permanently eliminated any plans fore.xpansion of County
Road 15 along the lakeshore, and fiscal pressures including the levy limitations have prohibited any
local assumption of new city street maintenance. The only pla ns a foot a re those to Orono has taken
positive steps to reroute suburban traffic away from the lakeshore, bv completion of the McCullev
Road connection between Countv Road 19 and Countv Road 6 in 1981. and recent upgrades to
County Road 6 and Watertown Road. Additionally, the recent reconstruction of Countv Road 15 will
allow for faster commutes for Orono and west Lake Minnetonka area residents . Th ere a re no pla ns
to e.x ped ite er improv e traffi c access to or with in Prone. However, all of these improvements have
had the primary goal of providing for commuter traffic through Orono. and were not necessarily
required to provide better access within Orono.
CMP 6-12
I
I
I
J
Housing opportunities have remained varied but with new emphasis on recycling of existing
structures both along the lakeshore and in the rural areas. New construction is heavily weighted
toward individual scattered sites with very little development on tracts of resulting in more than
three 5-6 dwelling units.
Likewise, there have been major changes in metropolitan sewer facilities. Where ten years ago
While thirty years ago the MWCC thought expected that all of Orono was to be sewered and
developed at an urban density, regional trends have Orono's low-densitv land use plan caused the
Orono interceptor to be redesigned, relocated and installed so as to serve only the existing urban
areas of the City and possibly certain other existing pockets of development along the lakeshore.
While The Metropolitan Council ’s 208 Water Quality Study in the 1970 ’s concluded that upgrading
of Maple Plain's treatment plat would best serve to reduce pollution problems without requiring
additional interceptor construction, the Maole Plain interceptor was eventually constructed but with
little excess capacity to serve Orono . Therefo re, no Oro n e-Lo n g Lake inte recpler eapacit)* was
pro vid ed for Maple Platn;
The remaining rural areas have therefore been recognized as being permanently rural and
permanently self-sufficient as far as sanitation facilities are concerned. This on-site capability is also
in tune with a realignment of national engineering and environmental philosophies which now
recognize the advantages of water resource recycling and the manageability of low density treatment
and disposal systems as opposed to ground water depletion and the tremendous environmental
problems of concentrated pollution overloading at central treatment plants.
CMP 6-13
COMMUNITY MANAGEMENT PLAN: IMPACTS ON SEWER PLANNING
The intent of this section of the CSPP is to provide basic community development information as
it is directly related to sewer facility planning. The intent is not to duplicate the more detailed
discussions included in other chapters of the Community Management Plan. Therefore, the
following sections are brief summaries of the information contained elsewhere in the CMP.
Historic development patterns have resulted in a city which is partially urban and partially
rural. The citizens of Orono have decided t. t a long range planning objective of the City is the
permanent retention of the rural community. This objective is in line with the existing developed
density of the area, with the similar plans of other cities abutting the rural area, and with the
legislative intent of metropolitan planning such that expensive urban services not be over extended
into undeveloped areas.
The urban areas of Orono will be provided with full and sufficient urban ser\ ices including
municipal sanitary sewer having sufficient capacity to accommodate all projected urban
development. The rural areas of Orono will be expected to remain self sufficient with each property
owner responsible for providing his own on-site sewage treatment.
Orono's natural resources plan provides for protection and preservation of Lake Minnetonka
through control of urban storm water runoff and through retention of all natural marshlands,
wetlands and drainageways. The basic goal of protecting, preserving and improving the water
quality of Lake Minnetonka is to be accomplished through implementation of two basic planning
principles:
1. The quality and quantity of storm water nutrient pollution is to be controlled by limiting the
density of development near the shoreline and throughout the watershed, and by providing for
ma.x imu m limitations on the amounts of hard surface development in relation to natural
assimilative capacit>.
Wetlands, marshland and natural drainagways are to be preserved and protected from
encroachment as the only practical, effective and economical method of retaining and filtering
nutrients from Lake Minnetonka's storm water inflow'.
These principles affect urban planning and sewer facility capacity by prescribing maximum urban
land use densities as utilized in the CSPP inventory of "future" sewer service demand. These
principles affect rural planning by permitting rural two acre development while prohibiting total
urbanization of the watershed. As discussed in the "development paradox", the extension of urban
services such as sanitary sewer into the rural area would so tax the land as to require urbanization
resulting in loss of wetlands and effectively an eventual degrading of Lake Minnetonka's water
quality.
Orono's land use plan calls for development in both the urban and the rural portions of the
City. The urban area will see new residential development on the existing vacant lots and
undeveloped parcels similar-to the forms of developmen t projected for the eloscr-in 3ubu rb3_at
densities of 1 -3 units per acre. Urban commercial development will be restricted to neighborhood
scrv ices in the existing Navarre Area and fuller utilization ofthe industrial and commercial potential
near Long Lake. Overall urban density will remain relatively low because of the ecological
CMP 6-14
I
I
I
r
I
I
considerations of proximity to Lake Minnetonka.
The rural area will see continued residential development at a slow, steady pace with mo st land
tH*- Mo na being of the two to fou r lot variety in a manner similar to that of the past two decades.
Str -1 subdivision review will ensure adequate retention of privately maintained open space, wetland
conser\ation, and on-site system site evaluation. Non-residential development will be limited to
quaai-agrieultural uae»«tehea greenhouae a, truek-farma and open space recreation. With the large
percentage of wetlands, steep slopes and public open space, the gross developed density is expected
to be about 1 unit per 7 acres in the 5-acre zone and 1 unit per 4 acres in the 2-acre zones , with the
net developed density not less than 1 unit per 2.0 acres of dr>'-buildable land, this being determined
on a detailed review of individual site conditions.
Orono's projected population growth has dramatically declined in the last ten years.
In 1970. Orono was projected to have an ultimate (year 2060) population of 37,000. As o f I9'?8;
Oreno projects a year 2000 po pulatio n of -9'.'5 40 and the Metro pelitim Cou ncil projects an ultimate
po pulatio n of 11,000 . As of 1998. Orono proierts a year 2020 population of just under 9,000 . This
figure is very close to our existing estimated population of 7.800 and is still potentially high
considering our recent growth trends, and would be easily obtainable within our existing zoning
densities.
This decline ts'co nsistent with the general decline in birth rate and po pulatio n project ions fo r the
region as a whol e, ns well as a realigatien that a po pulation shift is o ccurring which will see renewed
gre^ th o r stabilieatio n of the central cities and inner-ring suburbs. The proj ected po pulation is in
line ith Orono's pro posed land use and faeilitics plans. The po pulation reduction is co nsistent with
Oro no's rural land use preservation pol icies, with the State Department of Transpo rtatio ft'a decisio n
to abandon upgrading o f Highway 12 and with the reduced service area and design capacity of -the
Orono - Lon g bake ■ Intercepto r:
Orono's housing plan accommodates all expected population growth in a variety’ of housing
opportunities. The forecast population increase of Sr240 approximately 1500 persons in the ne.xt
twenty years translates into a housing demand of approximately 900 new dwelling units.
Approximately 40% 55% of these units are expected to develop in the urban area and approximately
60% 45% in the rural area.
Most new urban housing will be in the form of single family homes on scattered vacant lots
throughout the sewered area. Opportunities exist for substantial rehabilitation projects in the older
urban neighborhoods and for scattered-site new construction of affordable and lifecvcie housing
units. Some planned restdential develo pments including attached townhe mea shou ld-occu r in the
Navarre .‘\rca. Other new units will be in the fo rm of replacement o r eonveraten of cxi:uing seasonal
w<nhstnnfliiitl-dwelling«t cspecinllv along the lukcshere. New areas proposed for urban development
located primarily outside of the defined Shoreland area will be developed at densities ranging from
I to 4 or more units per acre, commensurate with the Citv's identified need for a wider range of
housing alternatives to serve an expanding range of housing needs.
Most neu rural housing will be on new lots of two to five acres net buildable area, all with prior
approved site evaluation and proof of adequate septic system operation. These rural building sites
when provided with private roads, wells and on-site systems ha\e market values comparable to
CMP 6-15
urban lots of t0,0ii0 aq. ft. 1/4 to 1/3 acre provided with paved streets, sewer, water, storm sewer,
etc. Therefore, the rural lots provide maximum protection for Lake Minnetonka plus an equally
affordable alternative lifestyle without requiring e.xcessive public facilities expenditures. Sanitary
sewers and other urban services will not be extended into the rural area to promote new development
or expansion of urbanization.
Orono's transportation plan is tailored to the different needs of urban and rural
neighborhoods. All roads within Orono directly seivice the abutting properties with limited-access
major arterials beginning east of the City. Near the lakeshore and in some rural areas, the collector
roads are relatively slow speed with circuitous alignment dictated by the hills and bays rather than
by commuter preference. These roads have been designated "scenic parkways" to connote their
aesthetic qualities and lack of high speed, through traffic potential.
The urban areas are provided with a typical network of city streets connecting residential and
shopping areas with each other. The rural area is gridded-off with a core system of publicly
maintained collector and minor arterial streets running at regular intervals. Within this grid, most
rural homes are located on neighborhood owned and maintained private roads serving from three
to ten residences each. These roads are constructed to city standards for safety and durability, but
are privately maintained without requiring city staff or equipment.
Orono's parks and open space facilities reflect different urban and rural characteristics. In
the urban area, the City is involved with numerous small neighborhood parks and playgrounds
offering centers for neighborhood activities such as swimming, skating, softball and soccer. In
addition, two larger urban area preserves offer substantial "natural" areas to break the urbanized
monotony.
In the rural area, most open space is managed on a privately-owned basis with large lots and
individual recreation opportunities including joint riding trails. Large public and quasi-publi''
recreational facilities include Hennepin County Park Reserve lands, several golfcourses, a gun club^
two DNR Scientific and Natural Areas, and the State DNR's Luce Line Trail.
I
I
I
-i
CMP 6-16
SEWA GE TREA TMEST POLICY PLAN
The following Goals and Policies comprise Orono's Comprehensive Sewage Treatment Policy Plan
(CSPP).
BASIC SEWAGE TREATMENT GOALS
1.
2.
3.
To provide an adequate, safe level of sewage treatment and waste water disposal for
all residences and other occupied properties in the City
To protect Lake Minnetonka, other lakes and streams, surface and ground waters
from sewage effluent pollution.
To achieve the above goals within the financial capabilities of the City and its citizens
without becoming an intolerable burden on the landowners or taxpayers.
URBAN SEWAGE TREATMENT POLICIES
1.
3.
4.
The Orono's urban (sewer) service area is fixed.
Orono's Urban Seiricc Area (MUSA) an d the Sewe r Service Area (MSSR )-are is fixed by
this and the other elements of the Community Management Plan and are ]s legally described
by Resolution of the City Council as shown on Map No.__(see also the CSPP Appendix).
The boundary bet>vcen Orono's urban and rural service areas is not strictly defined
bv the MUSA boundary. The boundary between Orono's Urban and Rural service areas is
defiled bv the density of development and level of public services intended to be provided.
Orono w ill not define its Urban and Rural ser\ ice areas based merely on whether municipal
sewer is provided. The MUSA boundary has been amended bv the City in the oast to allow
for retrofitting of existing Rural Ser\ ice Area neighborhoods with municipal sewer, to solve
existing sewage treatment problems. In these areas, the zoning has not changed to allow for
additional development at urban densities, and urban services other than sewer have not been
provided. Provision of municipal sewer ser\ ice to existing neighborhoods within the Rural
Service Area has not changed their classification from Rural to Urban.
Future expansions of the sewer svstem into the Rural Service Area to solve existing
neighborhood sewage treatment problems or along thelakeshore to avoid or eliminate
potential negative impacts on lake water qualit>‘. will not result in a reclassification of
those neighborhoods from Rural to Urban. Expansion of the sewer svstem into the Rural
Service Area will not result in the provision of additional urban services, nor will it result
in changes to allowed development densities.
Additional urban development will occur on lv in the designated Urban Service Area.
Additional urban development will occur in the urbanized areas consistent with the
capacities of the existing urban services and at limited densities consistent with all
environmental constraints.
I
CMP 6-17
5. Expansion of the MUSA to allow sewering of existing neighborhoods or developing
lakeshore properties within the Rural Service Area, is not an expansion of the Urban
Service Area.
^ Provision of municipal sewer to existing neighborhoods or developing lakeshore
properties within the Rural Service Area will not result in new development or
redevelopment at densities inconsistent with Rural Service Area standards. Provision
of municipal sewer to properties in the Rural Service Area will not result in the rezoning of
neighborhoods or individual properties to allow urban density development.
7. Additional rural development will occur in the designated Rural Service Area.
Additional rural residential and auasi-agriculturai development can occur in the rural areas
without taxing the limited capacities of existing rural services. Rural development will
occur at limited densities consistent with self-supporting on-site sewer and water services
and with maintenance of natural amenities, open space and other rural community
characteristics.
^ Sewering of the urban area was necessar>’. The character and historic density of land use
in the e.xisting urban area of Orono, coupled with its general proximity to Lake Minnetonka
both required and economically justified the installation of sanitary sewer to alleviate
existing health and environmental problems.
9i9. All urban property will be served. The City will provide a municipal sanitaiy sewer
collection system to all developed properties in the urban area.
4i 10. Urban sewage will be carried out of the watershed for treatment. Consistent with
requirements of the Minnesota Pollution Control Agency, Orono's municipal sewer system
will be is connected to the metropolitan interceptor for ultimate treatment at MVVCC's Blue
Lake Treatment Plant.
Si IjL Sufficient capacity will be provided for all planned development. The municipal sewer
facilities and metropolitan interceptor flowage reserve will be designed with sufficient
capacity to accommodate existing users and proposed development of Orono's urban area
at the existing zoned density.
S: 12. The existing urban area will not be expanded beyond the revised boundaries proposed
in this plan. Orono's Community Management Plan Is not a staged growth plan. The urban
service area will not be expanded into the rural area. Municipal sanitary sewers will not be
e.\tended into the rural area for purposes of fostering or allowing increased development
density in those areas, and will only be extended to provide service to specifically identified
lakeshore areas to serve e.xisting neighborhoods or new development at currently zoned
de nsities, or to solve sewage treatment problems in existing neighborhoods where on-site
systems are determined to be not practical or feasible on a lonu-term basis.
li Excess sewer capacity will not be required. The ultimate density of Orono's urban
development is determined by the environmental constraints of proximity to Lake
Minnetonka. The fixed location of urban development is determined by wetlands
prescr\ation and the permanent viability of the rural community. Taken together these
CMP 6-18
I
I
I
I
I
1
]
1
1
I
1
I
I
I
I
1
I
I
I
I
I
I
I
I
I
I
I
I
factors allow accurate determination of ultimate sewage flow and hence facility capacity
without the need for arbitrary and expensive oversizing.
8: 1^ City sewer projects will serve existing development only. Municipal sewer laterals will
be extended within the boundaries of the urban area to serve those few developed properties
which are not presently served. The timing of such e.\tensions will be dictated by the nature
and severity of any health of environmental problems as they may arise. These extensions
will be undertaken as City projects with the majority of costs assessed against the benefiting
prope.ties as has been the policy and practice of the City of Orono on aH past sewer
projects.
9; 1^ New developments will be served by developer-installed laterals. Municipal sewer
laterals may be extended w ithin the boundaries of the urban area to serv e new development
on vacant properties provided the development occurs at the established zoned density, the
development does not overburden or exceed the design capacity of the existing system, and
the developer pays and finances the entire cost of the project.
■fO; The City will operate and maintain the urban sewer system. To assure cost effectiveness
and quality control, the City will own, operate and maintain the entire urban sewer system
of mains and laterals except for those lines operated by the MWCC as interceptors.
14717. All sewer-serviced properties must be connected. Consistent with the regulations of the
Minnesota Health Department SHrte-Board of Health, and the MWCC MCES. every building
intended for human habitation, occupancy or use shall be provided with suitable sanitary
faci’ities and shall-be connected to the municipal sewer system whenever a sewer lateral
serv es the property or is within a reasonable distance of the property.
-IS; 18. City sewer service will be self-supporting. The operation, maintenance and depreciation
financing of the municipal sanitary sewer system will be completely financed by user
charges sufficient to cover all allocable costs without requiring any general tax subsidy.
48; 19. Sewage discharges will be regulated. Consistent with the rules and regulations of the
MWCC MCES. the City will regulate excessiv e strength or hazardous material discharges;
the City' will prohibit roof and foundation drainage discharges; and the City will actively
monitor and control storm water infiltration.
14; 20. Sewer construction will conform with state codes. Installation of new building sewers,
connection stubs or sewer laterals shall be by licensed plumbing contractors and shall utilize
materials and methods approved by the Minnesota State Board of Health Department .
48; 21. Orono's urban sewer policies have impact on metropolitan facilities to the extent that
the known sewage flow must be accommodated in the metropolitan interceptor. There
is no adverse impact and no unplanned impact.
CMP 6-19
RURAL SEWAGE TREATMENT POLICIES
1.
2.
3.
4.
5.
6.
7.
The Rural Service Area is fixed. Orono's Rural Ser\ ice Area is fixed by this and other
elements of the Community Management Plan and is legally described by Resolution of the
City Council as shown on map No.___(see also the CSPP Appendix).
The boundary bet^veen Orono*s urban and rural service areas is not strictly defined
by the MUSA boundary. The boundary' between Orono's Urban and Rural serv ice areas is
defined bv the density of development and level of public services intended to be provided.
Orono will not define its Urban and Rural service areas based merely on whether municipal
sewer is provided. The MUSA boundary has been amended bv the Citv in the past to allow
for retrofitting of existing Rural Service Area neighborhoods with municipal sewer, to solve
existing sewage treatment problems. In these areas, the zoning has not chanced to allow for
additional development at urban densities, and urban services other than sewer have not been
provided. Provision of municipal sewer service to existing neighborhoods within the Rural
Service Area has not changed their classification from Rural to Urban.
Future expansions of the sewer system into the Rural Service Area to solve existing
neighborhood sewage treatment problems or along the lakeshore to avoid or eliminate
potential negative impacts on lake water quality, will not result in a reclassification of
those neighborhoods from Rural to Urban. Expansion ofthe sewer system into the Rural
Service Area will not result in the provision of additional urban services, nor will it result
in changes to allowed development densities.
Additional urban development will occur only in the designated Urban Service Area.
Additional urban development will occur in the urbanized areas consistent with the
capacities of the existing urban .services and at limited densities consistent with all
environmental constraints.
Expansion of the MUSA to allow sewering of existing neighborhoods or developing
lakeshore properties within the Rural Service Area, is not an expansion of the Urban
Serv ice Area.
Provision of municipal sewer to existing neighborhoods or developing lakeshore
properties within the Rural Service Area will not result in new development or
redevelopment at densities inconsistent with Rural Service Area standards. Provision
of municipal sewer to properties in the Rural Service Area will not result in the rezoningof
neighborhoods or individual properties to allow urban density development.
Additional rural development will occur in the designated Rural Service Area.
Additional rural residential and quasi-agricuUural development can occur in the rural areas
without taxing the limited capacities of e.xistinu niral services. Rural development will
occur at limited densities consistent witiT self-sunnorting on-site sewer and water serv ices
and with maintenance of natural amenities, open space and other rural community ’
characteristics.
I
I
I
I
I
I
I
I
I
CMP 6-20
I
I
I
3; 8. Rural density is limited by natural conditions. Dev elopment of rural Orono is limited by
a number of natural conditions including extensive wetlands, steep slopes and areas of high
water table, which factors influence building locations and transportation options as well
as the location and spacing of on-site sewage treatment systems.
h 9. Rural land uses do not require municipal sewer service. Orono's soil, topography and
low-density rural land use provide the ingredients necessarv' to assure safe, adequate,
permanent on-site sewage treatment and waste water disposal without hazard to ground
water, surface water or the public health.
4; 10. Rural sewage will be treated on-site. Sewage treatment and waste water disposal within
the rural area will be by means of individual septic tank and soil absorption systems or other
innovative on-site methods approved by the Minnesota Pollution Control Agency and the
City of Orono.
n. Rural sewage treatment is the responsibilitv' of the individual property owner.
Individual property owners are responsible for providing their own safe and adequate
sewage treatment on each and every property within the designated rural area of the City.
Failure of the owner to provide for proper maintenance, or failure of the system itself, will
cause City intervention and strict ordinance enforcement. In extreme cases if a system
cannot be repaired or maintained because of site limitations, the City is prepared to
condemn such properties for health and sanitation reasons.
1^ The existing rural area will not be urbanized. Orono's Community Management Plan is
not a staged growth plan. The urban service area will not be expanded into the rural area.
Municipal sanitary sewers will not be extended into the rural area or across open, rural
lands, but will only be e.xtended to provide service to specifically identified lakeshore areas
to serve existing neighborhoods or new development at currently zoned densities, or to solve
sewage treatment problems in existing neighborhoods where on-site systems are determined
to be not practical or feasible on a long-term basis. Rural land uses and rural land use
density will be maintained at a level to ensure that private on-site aewef sewage treatment
systems will operate satisfactorily.
13. Municipal sewer capacity' is not available for rural development. Orono's rural land has
sufficient natural capacity for on-site sewage treatment to accommodate proposed rural
development at the existing zoned density. The municipal sewer system and the
metropolitan interceptor arc not designed for increased sewage flow from rural Oiono under
a high-densitv development scenario.The municipal-sewer system and the metropolitan
mtereeptor are not av ailab le for eonneetton from properties in the Rural Sen icc Area.
8; 14. Rural development will be subject to proven on-site sewage treatment capability. New
development in the rural area will continue to be contingent upon the developer providing
prior technical evidence that the site contains sufficient suitable land for all development,
an acceptable primaiy drainfield area, and reserved space for at least one alternate drainfield
area. The zoning area requirements for rural Orono are therefore based upon minimum areas
of drv buildable land e.xclusiveofroadwavs, wetlands, streams or areas of high water table.
L
D CMP 6-21
9; Orono's established inspection program will monitor all on-site systems to assure
proper use and maintenance. The owners of all properties in the rural area are required
to properly use and maintain their on-site sewage treatment systems so as to assure the
highest level of adequate sewage treatment. This requirement is administered and enforced
by the City's established On-Site Management and Inspection Program.
Evidence of improper system functioning will require immediate corrective action.
Whenever an existing on-site system should be found to be operating improperly, the
property owner will be responsible for correcting the deficiencies in an e.\peditious manner.
Such corrective measures include a number of options and alternatives ranging from simple
maintenance to system replacement. If the owner cannot afford repairs or refuses to correct
a demonstrated problem, the City will cause the repairs to be made and the cost to be
assessed to the-property. If repairs are impossible, the City will condemn the property.
a. 17. Analysis of alternative waste management options will occur if sewage treatment
deficiencies are documented in rural housing clusters. In the event that multiple on-site
system deficiencies should occur in one of the extsttng few remaining isolated pockets of
unsewered development in the rural area, the correction of those deficiencies will be a
concern of the City, the neighborhood and the property owners alike. Individual system
repair or replacement will remain the first option. This may involve joint systems,
acquisition of additional land or selective condemnation. Other options include innovative
or low-water systems, community drainfields or selective condemnation. The extension of
municipal sanitary sewer will be considered only if the environmental and/or health
problems cannot be economically resolved on-site and then only if the neighborhood is
adjacent to the existing urban area or along the route of the MWC€MCE$ interceptor. In
no case will the land use density be increased or new areas opened for development because
of such a sewer extension.
43; 18. The City's on-site management program will be self-supporting. The administration and
enforcement of the On-Site Management and Inspection Program will be completely
financed by permit fees and an annual service charge to be paid by all operators of on-site
sewage treatment systems, which charges shall be sufficient to cover all allocable costs
without requiring any general tax subsidy.
43.19. Education is a principal tool of the on-site manager. A major emphasis of the On-Site
Management Program will be in the education of designe rs; tnatallcra, and homeowners in
the proper location, desig n, eon struet io nruse and maintenance of individual on-site sewage
treatment systems. Education of ISTS professionals will remain in the purview of the
Minnesota Pollution Control Agency.
44:2^ On-site sewage treatment systems will be designed and constructed to strict
performance standards. Site evaluation, location, design and construction of all new on
site systems, and repairs to all existing systems, shall be by licensed trained installers ISTS
professionals in accordance with State requirements and shall utilize methods and materials
consistent with the rceemmendatien a requirements of the Minnesota Pollution Control
Ageney'a WPC -40 Rules Chanter 7080 and the City of Orono's mere restrietive On-Site
Sewage Treatment Ordinances.
CMP 6-22
I
I
I
\
I
t *
B
i5;2i. Orono's rural sewage policies have no minimal impact on metropolitan facilities in that
the rural area is self-sufficient and is intended to requires no metropolitan reserve
capacity.
1.
2.
COOPERATIVE SEWAGE TREATMENT POLICIES
The City of Orono will cooperate with adjoining municipalities. Lake area municipal
boundaries do not always follow watershed or historic development patterns: thus the
sewage treatment needs of isolated neighborhoods often are best and most economically
served by cooperative agreements between cities. Orono expects to continue the agreements
and working relationships established with Minnetonka Beach, Wayzata, Long Lake,
Plymouth, and Medina.
The City of Orono will cooperate with State and regional agencies in the satisfactory
achievement of metropolitan planning objectives. The City of Orono supports the
Minnesota Pollution Control Agency's plan for providing sewer service to urban areas
abutting Lake Minnetonka. The City of Orono supports the Minnesota DNR, the Minnehaha
Creek Watershed District and the Lake Minnetonka Conservation District in their goal of
watershed protection and water quality preseivation for Lake Minnetonka. The City of
Orono supports the Metropolitan Council in their quest for rational planning and efficient
use of public urban services in the Twin Cities Metropolitan Area. The City of Orono
supports the Metropolitan Waste Control Commission Council Environmental Services in
their need to determine ultimate capacity of regional sewer service facilities.
CMP 6-23
RURAL SEWAGE TREATMENT POLICY PLAN
INDIVIDUALON-S ITE FACILITIES
Individual privately owned and operated on-site facilities provide safe and adequate sewage
treatment for properties located in Orono's rural service area. Orono's Rural Service Area
(comprised of the 2-acre and 5-acre residential zones) is identified oirMap Ne. 6 in Figure The
rural area includes two-islands in Lake Minnetonka p lus th e west, central and northern p ortions of
th c-Gity adjacent to Independence and Med in a. Within the rural area, nearly all water supplies are
provided by individual wells and aH most sewage treatment is provided by individual on-stte sewage
treatment systems ("ISTS"). A number of specific neighborhoods within the Rural Service Area
have been provided with municipal sewers to solve neighborhood problems or to protect the lakes,
but no other urban services are planned for these areas.
Rural land use is characterized by low density residential and quasiagricultural properties
interspersed with fields, woods and marshland. Neighborhood character varies from lonely
farmsteads to a few "crossroads" housi ng clusters dating from the early 1900 ’s ranees from scattered
farmsteads, to a small number of residential clusters dating back as much as a century, to the
characteristic rural subdivision developed in the last 25 years. Summer cabins generally on small
lots populate Big Island, while mainland homes are scattered typically on parcels of two to five acres
or more. Non-residential properties are very limited in number.
The topography of rural Orono is rolling and pockmarked with glacial potholes and wetlands. The
soil types are generally heavy yellow clays providing slow percolation but superior filtration and
waste water treatment.
The combination of soil, topography^ and historic development patterns and the City's commitment
to protection of Lake Minnetonka have limited the rural density while at the same time have
provided reliable on-site sewer and water performance. With sufficient dry buildable land
surrounding each dwelling, each property owner has the means of providing for his own utilities in
an economical, environmentally acceptable manner which will give maximum protection for Lake
Minnetonka and its watershed.
.1
I
I
The City of Orono maintains a complete inventory of existing on-site sewage treatment
systems. Each rural property relying upon on-site sewage treatment has been individually identified
and inventoried as part ofthe City's On-Site Management Program. The City records for each system
include Installation permits and periodic inspection reports plus an a computerized Inventory card
detailing the occupancy type, construction date and installer, system type, septic tank details,
drainfield details, well data, location sketch, pumping data and city inspection record.
Eaeh en-si te syste m has been located on plat map half-sectio ns which arc in cluded in (he Appen d ix
Sectio n of the CSPP. The inventoiy of system users is summarized in the following table:
CMP 6-24
I
I
I
I
I
I
I
I
I
I
L
a
-------------(OLD TABLE)---------------
EXISTING ON-SITE SEWAGE TREATMENT SYSTEMS
Residential
Residential - Seasonal
Churches
Retail
Golf Courses
Conference Center
Art Center
Day Care Center
City office
930 (includes farmsteads)
SO (cabins - most on Big island)
4
4 (1 market, 1 auto repair, 2 boat suppliers)
3 (2 with clubhouse)
I (Spring Hill - use varies)
1 (short class educational)
I (5 days/week)
1 (5 days/week)
TOTAL ON-SITE USERS 995
(NEW TABLE)
Existing Individual Sewage Treatment Systems
Residential
Residential-Seasonal
Churches
Golf Courses
Daycare Center
1101
SO (Cabins on Big Island)
3
4
1
Total On-Site Users 1159
ISTS Management Program
The use of on-site sewage treatment systems is carefully regulated by the City per standards
established bv the Minnesota Pollution Control Agency to assure adequate public health and
environmental protection.
City regulation of on-site sewage treatment systems began in the early 1950's when construction
practices were inspected according to State Board of Health recommendations. In 1961, a new
ordinance was adopted governing site evaluation, design and construction of all systems. The
standards in this ordinance were equal to or exceeded those adopted by the Minnesota PCA MPCA
in their 1978 WPC-40 Recommended Practices. Since the mid 1960's site evaluation and system
design approval has been required prior to building permit issuance.
In 1970, the City of Orono became one of the first cities in the nation to adopt a wetlands
preservation ordinance prohibiting marshland destruction and establishing flood plains and
protective setbacks for all construction including on-site systems.
in 1974, the minimum rural lot size was increased from 1 acre gross area to 2 acres dry buildable
net area per residence consistent with Federal EPA recommendations. Simultaneously, the City
CMP 6-25
began close cooperation with the Hennepin Soil and Water Conservation District in soil analysis for
septic system design.
Beginning in 1976, the City has required engineered site evaluation and proof of adequate area,
ground water and percolation rate prior to rural lot division approval. This has become the most
critical criteria in all rural subdivision considerations. Fin ally, in in 1978, all of the above
regulations were codified into one comprehensive on-site sewage treatment ordinance which
in cludes included a City inspection program and mandatory use and maintenance provisions for all
existing systems.
In the late 1980*s the MPCA recodified it*s on-site sewage treatment rules as MR Chapter 7080. In
1992 the City of Orono revised its ordinances to incorporate the Chapter 7080 standards, while
retaining certain standards which were more restrictive than those in Chapter 7080. and required
City licensing of site evaluators. Bv the mid 1990's the MPCA began to license Individual Sewage
Treatment System HSTS) professionals, and the City dropped its local licensing requirements.
During the late I990's the State Legislature has made annual changes to the provisions of Chapter
7080 which the City is monitoring on an ongoing basis. City ordinances will be revised as necessary
to meet Chanter 7080 requirements as they evolve.
The most recent Chapter 7080 revisions allow local units of government to approve and allow the
use of "performance systems”, i.e. septic systems of an innovative or unusual design which do not
meet historically accepted "prescriptive ” svstem design parameters, such as height above seasonal
saturation, etc. The intent of this new State regulation is that the actual site-specific environmental
impacts of each individual performance svstem installed, shall be monitored on an ongoing basis,
and if maximum impact parameters are exceeded, the svstem must either be made compliant, or
abandoned. There are numerous risks involved with the acceptance of such systems, and the City
of Orono will proceed cautiously to ensure that new technology will be given a "fair shake". At the
same time, the City will not allow new technology to become an administrative burden nor allow
it to result in properties which have no options should the new technology fail to provide adequate
sewage treatment and disposal
Each on-site system is periodically inspected by the City to assure proper use and adequate
maintenance.
Orono's on-site sewage treatment ordinance mandates that each system owner properly use and
maintain his system so as to assure adequate sewage treatment. There are two very inn ovative
important parts of Orono ’s ordinance. First is that these provisions are administered and enforced
by a City On-Site Systems Manager who devotes full time to administration of the ordinance.
Second is that this program is totally financed by user fees:
- Developers pay for the City's site analysis and review through special application
fees;
Contractors pay for site inspections through construction permit fees; and -
Periodic inspection of existing systems is paid by the on-site landowner who is sent an
annual inspection fee bill similar to utility billing practices in other cities.
Orono's On-Site Management Program includes educational materials and typical review of site
evaluations and system designs. The un ique An important feature is a programmed inspection of
I
I
I
I
I
I
CMP 6-26
every existing on-site system by the trained City employee. Each system is physically inspected for
proper operation, at least once every three years and more often if site or use parameters are more
critical than normal. To date, after two summers of operation; this program has resulted m the
inspeetion of some SOO sys tems ehosen on a priority basis. Inspcetion of the remaining (gcncfalty
pmgHimmcd-fof completion during the summer of 1980; This inspection program
has been in place for more than two decades, and has generated a substantial history for each
individual system in Orono.
A report is completed following each inspection. Each system is rated on its design and actual
operating characteristics. The site is evaluated for limiting factors such as soil, slope, or groundwater
and room for expansion or replacement, one copy of the report becomes a permanent City record,
while the second copy is provided to the owner for his information.
Most existing systems have been subject to soil borings in the past 4 years to confirm compliance
with the required separation from zones of seasonal saturation. It is estimated that 42% of the
approximately 1100 existing systems are non-compliant with the separation standards as of
November 1999. and City ordinances require that systems be made compliant within specified time-
frames when found to be non-comoliant. If repairs or alterations are required, the owner is notified
and given a reasonable time to comply. Septic tanks are required to be pumped every three years or
more often if there arc signs of trouble necessary based on inspection results. Pump reports are
received from contractors and evaluated to assure compliance and/or to reveal premature signs of
trouble.
On-site system operation has proven reliable in rural Orono.
Most of the ex isting sy stems were originally constructed or have been upgraded since the 1964-
ordinance. System failures have been rare away from the lakeshorc. Most deftetenetes have been
because of exee ssive water use or insufficient drainficid area for the typi cally heavy elay soils, of
the 500 syste ms inspected in the last hvo yea rs, only 6 0 required repairs.'of those-only a handful!
needed new septie tanks or drainficid, most requiring only miner tank repair or dramfic Id c.xpansionj
Orono began to require the use of mound drainfield systems in the late 1970's in locations where soil
were not suitable for trench systems, usually due to high seasonaltesting indicated conditions
groundwater conditions. As of November 1999 approximately 37% of the existing on-site systems
in Orono were mound systems. Of the approximately 700 systems which are not mounds, a majority
are standard trench systems, of which approximately 2/3 have been identified as not meeting the
minimum required vertical separation from seasonal saturation and which are on a finite schedule
for replacement.
Most of these nonconforming trench systems w ill be replaced bv mound systems. Orono has had
substantial success with the use of mound systems, and the level of expertise of ISTS professionals
has risen to a level over the last two decades such that mounds have become a reliable, standard
sewage system and not the 'innovation' they were in the late I970's. Approximately 95% ot all new
or replacement systems in Orono in the past decade have been mound systems.
The education and inspection program is expected to increase awareness of proper septic system use
and maintenance, and the required tank pumping will e.xtend usable drainfield life. In those c.xiatmg
cases where groundwater is high, inno>'ativc shallow trench or mound type syatema have proven
workable according to WPC-40 criterm: The majority of the developed properties on eld farmsteads
I
I
1
CMP 6-27
I
I
I
Of new aubdivisio n3 in Orono's rural service area have sufficient lot area available to provide ample
abso rptio n a rea for permanent reliance on standa rd dra inficid treneh dispo sa l on-site sewage
treatment systems. In the isolated cases where such area is not available, innovative approac hes will
be required to avoid the premature extension of municipal sewers.
The on-site industry is ever-changing. On the horizon mav be sewage treatment methods that do not
rely on site/soil conditions for proper sewage treatment. However, even if the provision ofdr ainfield
sites on each residential propertv becomes no longer necessary. Orono will not abandon it's
commitment to low-densitv residential development for the protection of La ke Minnetonka. The Cit>
of Orono is committed to assuring that on-site systems work properly and permanently and that any
operating problems are promptly corrected by the individual property' owner before becoming a
neighborhood liability.
Orono ’s ISTS Ordinances
A list of City ordinances which effect implementation of Orono ’s ISTS manageme nt program is
included in the appendix. The primary ordinances are contained in Municipal Code Section 12.30.
ORDINANCCNO. 210 APPLIES TO ALL PROPCRTICS W TllC CITY PCR SCCTION 22.20 A-S
FOLLOWS;
o fSECTION 22.20 GENERAL PROVISION!
The provisions of Section 12.30 appiv to all properties in the City, a s follows:
Subdivision 1. Treat ment Reo ttired. All sewage gene rated within the City shall be disposed ef by
co nnectio n to a central sewer system o r sha ll be treated and disposed of m an on-sitc system
ac co rding to the previsions of this Cede:
Subdivision 2. Jurisdictio n. The provisio ns of this Code shall a pply to -the metho d of sewag e
dispo sabf rem every build-lng within the City intended fo r huma n useor habitatten; whether such
use is permanent, tempo ra ry' er-seaso nal,-rega rdless ef the date of o riginal construction or use.
+r The ow ners ef all buildings where central sewer is available o r beco mes a va ilable, shal l
conne ct the buildings to the central sewer within 16 month s of the a va ilab ility ef the
sewer acc o rding to the prov isio ns of Cha pter 2s of the Orono Municipal Code.
3rr The owne rs of thos e buildings which have been com pletely co nnected to central sewer
shall be exempt'fro m the ma intenance and ina pectio n provisions of this Code*.*
Subdivision 1. General Provisions.
A. Treatment Required. All sewage generated within the City shall be disposed of by
connection to the Citv sewer svstem or shall be treated and disposed of in an on-site system
according to the provisions of this Section.
B. Jurisdiction. The provisions of this Code shall appiv to the method of sewage disposal from
every building within the CitN' intended for human use or habitation, whether such use is
permanent, temporary or seasonal, regardless of the date of original constructio n or use.
CMP 6-28
1.
2.
3.
The owners of all buildines where central sewer is available or becomes
available, shall connect the buildings to the Citv sewer within 16 months of the
availability of the sewer according to the provisions of the City Code.
At the time connection to Citv sewer is completed, all existing septic tanks no
longer in use sail be pumped out and filled with native soil.
The owners of those buildings which have been completely connected to central
sewer shall be exempt from the maintenance and inspection provisions of this
Section.
Administration of Ordinance No. 210 Section 12.30 inciudes all of the following requirements
and procedures which are consistent with the pol icies of the water quality-chapter o f the
Metropo litan Dev elo pment Guide general guidelines of the Metronolitan Council's Water
Resources Management Policy Plan
1. Subdivision regulations - no new subdivision is approved unless sewer is available or each lot
has been evaluated and proven to be aeecptable-fer have both primary and alternate drainfield
sites for construction of an ISTS o n-si te system in stallation .
2. Building regulations - no building permit is issued for new construction unless municipal
sewer is available or until the lot has been evaluated and proven capable of accepting all
development plus a primary and secondary drainfield area, and until the proposed on-site
design has been submitted and approved. No building permit is issued for any addition to
properties connected to on-site systems unless the existing system has been inspected by the
City and found to be o peratin g pro perly compliant, or, if substan dard noncomolian t. has been
upgraded to current requirements.
3. Site evaluation - soils in all areas of the City have been surveyed an d mapped by the Henn epin
Coun ty Soi l an d Water Cense rs’ation Service identified in the Hennepin Countv Soil Survey.
All site evaluation reports must relate soil type, topography and water table to the proposed
drainfield type and location. Site evaluation includes analysis of results from two soil borings
and four percolation tests in the primary draint ficid plus o n e bo ring and two perco latio n tests
in the seco ndary drainfie ld. and alternate drainfield sites. No system is permitted in flood
prone areas, near nor within established setbacks from creeks, lakeshore or marshland, or on
steep slopes (Orono has no bedrock situations).
4. System design and location - detailed construction draw ings and systcTn design information
are req uired before issuance of any on -site con structio n ISTS installa.i t permit in cludin g
gfestgn flow criteria, so il type, tan k, bed an d distribution system design. S\ ucm types are
regulated by the results of the site evaluation including standard and alternative designs
.''ependent upon soil type. The Citv is currently investigating whether or not to adopt
provisions of the the recently revised Chapter 7080 in regards to allow ing the use of
"Performance Systems”.
5. System construction - all new system installation or existing system repair or alteration is
subject to the issuance of a construction permit. All permittees must be licensed by the-City
State of M innesota an d must show evidenc e-o f qual ifleation in cluding co ntin uin g educatio n
in the Untv ewitv of Minn esota Agricultural Exten sion Sen ‘iee Ho me Sewage Treatment
I
I
I
1
1
CMP 6-29
I
I
I
I
I
I
I
I
I
I
I
I
I
[
I
I
I
6.
11.
12.
13.
Workshop. Materials and construction methods are regulated by code consistent with WPC'
4 0 and Minnesota Board of-Hcalth (plumbing code) the Chapter 7080 standards.
Construction inspection - The City On-Site Systems Manager inspects each proposed site after
receipt of a subdivision or building permit application and before approval of either. He works
with the developer and the developer's site evaluator to identify any site characteristics which
will affect the use of ISTS on the site. He reviews in the field the actual data submitted and
the physical properties of the site. He approves, modifies or rejects the proposed design (many
subdivision lot boundaries have been adjusted following such an inspection). The Manager
placards each drainfield-^ite to keep eenstruction activities away (sec Appendix). The
developer is required to fence each approved drainfield site prior to commencement of any
site improvements. After issuance of the ISTS construction permit, inspection is made at least
twice during the work and befere-the-system is buried throughout all phases of system
installation.
7. Scheduled inspections - the City inspector periodically inspects all existing on-site systems
in the City to determine operating characteristics and to detect operating deficiencies. Newer
systems are inspected at least once every three years with older systems programmed for
annual inspection.
8. On-Call inspections - The City Inspector will inspect any system upon receipt of a question
from the owner or a complaint by a neighbor to assist in handling problems or to enforce
compliance with proper operating standards.
9. Construction records - The City keeps permanent files of each system's site evaluation report,
design specifications and actual construction including contractor and dimensioned sketches
of actual system component location.
10. Operation records - an inspection Record is made upon every inspection of each system
including notice to the owner of operational characteristics and/or any orders for correction
of deficiencies
Pumping records - Each septic tank is required to be pumped-out every three years. Records
submitted by the licensed pumpers arc kept of every pump-out in the City to assure pumping
on schedule and to warn of excessive pumping indicative of improper system operation.
Ordinance enforcement - the Ofrimnnec Section 1 2.30 provides that each owner is responsible
for the correct operation of any on-site system. Repairs or corrections if necessaiy' are ordered
with reasonable times given for compliance dependent upon the nature of the problem. Non-
compliance is a misdemeanor subject to criminal citation, or can be corrected through civil
enforcement including injunction.
Administration - all portions ofOfdinanee-2 10 Section 1 2.30 are administered by a full time
City employee identified as the On-Site Systems Manager. All costs of the program are funded
by user fees in the form of permits, plan review fees and an annual inspection fee charged to
each operator of an existing onsite system ISTS through a computerized billing system
identical to typical sewer and water utility billing.
CMP 6-30
i
Future changes in sewage treatment ISTS administration are expected to be refinements of the
existing policies and ordinances, as well as changes promulgated at the State level.
The 1978 adoption of Ordinances 210 and 212 for the first time established detailed standards for
use and maintenance of both on-site systems and discharge into the municipal system. This new
emphasis will continue to need rcfincmcnt-as-it affects other ordinances-of the City. Citv’ code and
State rule revisions since 1978 have resulted in regulations which enhance the ability of ISTS to be
a permanent sewage treatment and disposal option for rural Orono.
A general reeodification of all City ordinances is in process and is necessary to completely integrate
these ordinances with other sections of the Municipal €odc. In the interim, the On-Site Code is
applicable by itself and has affected theFlood Plain ordinance (adopted on I0 -26-78) and the eurrent
drafts of a revised subdivision ordinance;
Office procedures, records and administration are also continuously being refined as the On-Site
Program matures enters its third decade. Educational materials have been prepared and updated, and
Permit forms and design manuals are available, ftrecord systems are being modified after two years
experience have been computerized. New-engineering procedures have been developed for design
standards,'review and inspcction-of-ncw sewer laterals and their effect on the-cxisting system.
A primary goal of the On-Site Program is to keep abreast of the ever-changing State regulations and
ensure that the Citv takes advantage of new technologies as they become proven. However. Orono
will not become a testing ground for such new technologies without establishing strict parameters
for monitoring and mitigation, to ensure that no new home is left without ISTS options should an
unproven technology fail.
In addition to ISTS regulations, the Citv has adopted regulations to prohibit sump pump discharge
to the municipal sewer system. Orono's extensive lakeshore area sewer system has experienced
inflow and infiltration (1 & 11 problems which have resulted in excessive incurred costs for sewage
treatment. Reduction of 1 & I bv eliminating sump pump discharges is one means of reducing the
City’s sewer system operating costs.
CM? 5-31
I
I
I
r
r
I
I
I
I
}
I
EXISTING SEWAGE TREATMENT FACILITIES
Sewage collection and treatment in Orono is accommodated by three separate "systems". Rural
Orono is served by individual on-site sewage treatment facilities. Urban Orono is served by a
municipal sanitary sewer collection system.•The Metropolitan Waste Control Commission Councjl
Environmental Serv ices operates an interceptor sewer system which receives flow from municipal
sewer systems in the Orono, Long Lake, Maple Plain. Medina and Minnetonka Beach munivipal
systems.
METROPOLITAN FACILITIES
I
The Metropolitan Waste Control Commission owns, operates and maintains interceptor sewer and
treatment facilities in Orono as indicated on Map No. 9; in Figure
FORMER ORONO TREATMENT PLANT
The now defunct Orono Sewage Treatment Plant was constructed in 1964 and was intended to be
the only treatment facility for urban Orono. The plant is was located on the west shore of French
Lake near County Road 84. The plant includes provided primary and secondary treatment equipment
pins followed bv an activated sludge tertiary’ treatment settling pond. Effluent discharges discharged
into French Lake which in turn ou tlets outletted into Crystal Bay of Lake Minnetonka, from 1964
until 1980 .
The Orono plant was orig inally designed to serve approximately 4 ,000 persons with vApavit> to treat
an average flow of .40 mgd. The plant receives all sewage flow Minnetonka Beach as well as
flow from southern Orono. The plant has been operating at about 75-800fi capacity with a
docume nted flow of .36 mgd. in 197 5 : The documen ted totol flow of 188 MG inl9 78 is equival ent
to. an average flow of 357 g pm. At this treatment ute., effluen t df r> argeyha-. c conformed to aH
quali t}’ standards except Pil:
TV.e MWee assumed ownership and operation of the Orono plant as a metropolitan facilit>' in 19^.
Upon completion and opening of the Orono-Long Lake Interceptor inoariy 1980, sewage processing
at the Orono plant will be was discontinued. The depreciation'schedule of the original purchase
agreement calls for owmership of the plant and g rounds to revert to the Cit> of Orono, without cost,
■It thp time pmee^sing ceases: Ownership ofthe plant and grounds reverted to the City of Orono, and
it has been converted to park and natural open space use bv' the Citv. except for a small parcel which
is the site of MCES Lift Station No.
FORMER LONG LAKE TREATMENT PLANT
The Long Lake Treatment Plant is considerably older than the Orono plant having served the City
of Long Lake and a portion of northern Orono for many years. This plant is was located in Orono,
just south of the Long Lake municipal boundary, on Orono Orchard Road. The plant includes
provided primary treatment only, with settling pond effluent discharging into Long Lake Creek
which m tu rn meanders through luial Orono before emptying into Tanagcr Lake and Drowns Day
Lcjkc Milinctonkii.
L CMP 6-32
As with the Orono plant, the MWCC assumed o\M)cr3hip and operation of the Long Lake Plant
around 1970. Prior to 1980 the Long Lake Plant operated at over capacity for approximately 5 years.
Upon completion and opening of the Orono-Long Lake Interceptor, this plant too wtH bc was
phased-out and the land returned to local control, except for a small parcel which is the site of
MCES Lift Station No. . The grounds, owned b\ the City of Lone Lake, were annexed from
BLUE LAKE TREATMENT PLANT
All sewage outflow from Orono will eve ntually be is conveyed to and treated at MW'CC's MCES's
Blue Lake Treatment Plant on the Minnesota River in Shakopee, which was expanded in 1993 to
increase its design capacity to the current level of 38.0 mad to meet the advanced secondary
treatment standards imposed in its NPDES operating permit. According to Orono’s System's
Statement, the Blue Lake Plant is currently operating at about 50% of its ultimate 20 mgd.
approximately 75% of its ultimate capacity, and is expected to be adequate until approximately
2009. at which time further expansion will be necessary under current growth projections. Orono's
sewer service capacity is limited by the capacity of the intervening interceptors including the Orono-
Long Lake Interceptor, and not strictly by the capacity of the Blue Lake Facility.
idc!
ORONO-MINNETONKA BEACH INTERCEPTOl ’
The Orono-Minnetonka Beach Interceptor (MCES designations 6-OR-641 and 8567) delivers
sewage flow from Minnetonka Beach and southern Orono to MCES Lift Station 59 at the site of the
farmer Orono Treatment Plant. Most of the interceptor line was constructed in 1964 as part of
Orono's original municipal sewer project, although future capacity was even then provided by Orono
for Minnetonka Beach.
Reconstruction and minor reconfiguration of portions of the line occurred in 1985 (project 85-67L
EDIT / UPDATE / CORRECT THE FOLLOWING 3 PARAGRAPHS
The original line runs principally along County Roads 19 and 31 from the Navarre Area to
the treatment plant on French Lake LS-59. The construction of this line consists of segments
of 10", 12", and 15" vitreous clay pipe interspersed mth five segments of 8" cast iron force
main. This line includes service stubs to properties along all gravity' segments.
The remaining portion of the Orono-Minnetonka Beach Interceptor was constructed in 1966
CMP 6-33
45%
9ver
4ant
iary
telv
57),
♦ •
The remaining ponion of the Orono-Minnelonka Beach Interceplar was consirucled in '^66 also
^mZPpar, ofOrono's local service ,o ihe NarmreArea This lineru^
ofCrvsIal Bay between Minnetonka Beach and the originai trunk sewertn tttmly ■
t^ZlTmline was utilised to service a han^ll of homes
short 6" iron force main. This line also includes local service stubs.
In 1973 the entire City of Minnetonka Beach >i'05 completely seweredutilLing the Orono
t!dZec!tlnt7antfl^^^^^Metropolitan Waste Controi Commission purchased the interceptor iinefrom onoin ■
TtZlZ mcc has assumed totai responsibility for operation and maintenance ofthts 3.5
miles of sewer and six lift stations.
nRONO-LON^- I AKF interceptor
rs^tX IJ Uke Treatmen. Plan, on .he Mlnnesca Rivenn ^^
more than S50 million dollars to extend interceptor sewers into the region. Ut seven origi ^
^pla„.s,.he0.c„op.a„u««
ulb^lzaton to make .his in.erceplor thefinal pne pf .he lasj phases of.he overall
project.
BeaTlntereeTtormril^ toe Is doon Conn.>' Roads 84 and 51 .o Conmy Road 1 5 and then
n‘?nn nrehard Road, eonneclin- vi.h 71 1 3 at the intersec|ion of Orono Orehard Road and onmy
Road IS.
imuccptui L.LLcpt by mtmiJ of municipal iiijcetion puiupme atation^
urban Orono as follows:
?66
CMP 6-34
J
(OLD TABLE)
Pipe and Pump Design Year 2000 Design Demand
Average Daily Flow (cfs)Average Daily Flow (rogd)Peak Flow Sewered Sewer Units
CITY Residential Non-Residential Residential Non-Residential Total gpm Populatio Residential Non-Residential
Total n Total
Orono Pump Station peak
Orono 1.37 0.13 1.50 0.89 0.08 0.97 factor 7,699 2.405 212 2.617
Mtka. Beach 0.13 0.02 0.15 0.08 0.02 0.10 3.3 695 220 70 290
Sub-total 1.50 0.15 1.65 0.97 0.10 1.07 2.450 8.394 2.625 282 2,907
Lona Lake Pumo Station
Orono 0.03 0.14 0.17 0.02 0.09 0.11 peak 165 52 193 245
Long Lake 0.42 0.34 0.76 0.27 0.22 0.49 factor 2.350 735 596 1.331
Medina-Mom.0.07 0.00 0.07 005 0.00 005 3.5 265 83 0 83
Sub-total 0.52 0.48 1.00 0.34 0.31 0.65 1.600 2.780 870 789 1.659
Future Orono Injectors
Orono 0.09 —0.09 0.06 0.06 —522 163 0 163
Subtotal
Orono Only 1.49 027 1.76 0.97 0.17 1.14 —8,386 2,620 405 3.025
Total
Interceptor 2.11 0.63 2.74 1.37 0.41 1.78 —11.846 3.658 1,071 4,729
Flow rate: I IS gal/capita/day and 3.2 persons/household = 368 gpd = 1 unit
Source: City of Orono Resolution No. 901 - April 17,1978
Addendum No. 3, Preliminary Engineering Report, Orono-Long Lake Interceptor
Prepared by McCombs Knutson Associates for MWCC: November 1977
ONSERT NEW TABLE HERE>
I
I
1
]
J
J
I
CMP 6-35
J
>emand
er Units
^on-Residential
212 2.617
70 290
282 2.907
193 245
596 1,331
0 83
789 1.659
0 163
405 3,025
1,071 4.729
■The following section needs significant updating-
/. SOUTHWEST ORONO SYSTEM
CAPACITY 1511 units connected (1369 residential: 142 non-residential)
1099 units reserve
2610 units design capacity
DISCHARGE Orono Pump Station of Orono-Long Lake Interceptor
CONSTRUCTION Six (6) Projects I964U979
1964 Project: 8'\ JO”, 12”. 15” VCP gravity: 8 ” 10” CIP force main
1966 Project: 8 ”. 10” VCP gravity: 4”, 6” CIP force main
1967 Project: 8 ” VCP gravity
1970 Project: 8 ” VCP gravity: 4”. 6” CIP force main
1973 Project: 6”. 9” P VC & 12”, 15" RCP gravity: 2”. 4”. 6” DIP force main
1979 Project (private): 8" PVCgravity
SPECIAL FEATURES 29 wet wells and lift sattions
3 grinder pump stations
4 underwater channel crossings
2 force main bridge crossings
30% of the line is on private easements
This is the original municipal sewer system and it still serves the majority of urban Orono.
These lines were installed to provide pollution abatement and sewer service to the Navarre
business area and to the urban residential areas along Lake Minnetonka. The system was
originally designed with capacity to discharge flow from the saturation population in the
areas currently served including those areas designated for servi:e but not yet developed.
The original design included capacity for Minnetonka Beach. T lose portions of the trunk
sewer carrying Minnetonka Beach flow are now operated by MIVCC as the Minnetonka
Beach Interceptor.
fNeed to reflect addition of Stubbs Bav. North Shore Drive, Little Orchard. Etc.)
2. ORONO SCHOOLS S YSTEM
CAPACITY 100 units connected (2 residential: 98 non-residential)
0 units reserve because of restrictions in Long Lake
120 units future reserve with construction of Long Lake bypass
planned for 1981
220 units design capacity for Orono
DISCHARGE Long Lake municipal system
(& Long Lake Pump Station of Orono-Long Lake Interceptor
CONSTRUCTION 1967 Project: 8" VCP gravity
CMP 6-37
I
I
I
I
I
I
I
I
I I
I
This portion of the municipal system was constructed as an extension of the Long Lake
municipal system primarily to provide sewer (and water) service to the new Orono High
School being built on the campus west of Long Lake. In addition, this system provides
service to two other schools and to the Orono Industrial Park,
Allflowfrom the Orono School System discharges into the Long Lake municipal system and
eventually into the Long Lake-Pump Station of the Orono-Long Lake Interceptor. The
Orono School System has additional capacity in the Orono lines hut is limited by
restrictions of certain downstream lines in Long Lake.
In a cooperative agreement with the cities of Long Lake and Medina, Orono will participate
in construction of a bypass line in Long Lake to alleviate the existing constriction. The basic
purpose of this bypass is to provide capacity for sewering the existing 83 homesites in the
housing cluster of Medina-Morningside to eliminate an existing health problem caused by
failure of the on-site systems due to small lot sizes, tight soil and high water table. This
project will bypass the Long Lake restrictions with a new 10" line allowing sufficient
capacity for Medina-Morningside to be connected to tl. • existing Orono sewer line near the
Orono High School. In addition, the bypass will provide reserve capacity for the Long Lake
industrial area and other Long Lake users, will reroute enough flow to allow permanent
connection of Orono's Hackberry Hills area as it exists, and will permit reallocation of the
existing reserve in the Orono lines to the existing system users.
(Need to reflect completion of Medina system, the Long Lake bypass, addition of more area
to MUSA in 1989, and construction of sewers serving Sugarwoods, North Long Lake, and
Long Lake Countr>' Club Addition)
3. HACKBERR Y HILLS SYSTEM
CAPACITY 25 residential units connected - design capacity
0 units reserve
DISCHARGE Long Lake municipal system
& Long Lake Pump Station of Orono-Long Lake Interceptor
CONSTRUCTIOS 1973 Project: 9" PVC, 15" RCP gravity
Hackberry Hills is a compact development of 25 homes constructed in the 1950's on small
lots and with poor septic systems The area was experiencing multiple system failures and
health hazards by the early I970's which resulted in the construction ofthese sewer laterals.
Because the surrounding area is rural pastureland, the project was designed and
constructed solely to serve these homes with no reserve capacity for future development.
Also, the system discharges into the Long Lake system at a location that has no capacity for
additional Orono service. This discharge was originally intended to be temporary; however ,
upon completion of the Long Lake bypciss. there will be sufficient Long Lake capacity to
accommodate these 25 units on a permanent basis.
(Onlv minor chances needed re Hackberry)
CMP 6-38
r
4. WAYZATA SYSTEM EXTENSION
CAPACITY 54 residential units connected
II units reserve (existing vacant lots)
65 units design capacity
DISCHARGE Wayzata municipal system
CONSTRUCTION 1970 Project: 8" VCP gravity
1977 Project (private): 8" PVCgravity
1979 Project (private): 8" PVC gravity
This portion of the Orono municipal sewer systemfimctions as an extension of the Wayzata
system serving existing housing adjacent to the Wayzata border. The majority of the project
was extended in 1970 to provide sewer (and water) to the existing Chevy Chase
neighborhood. The two private projects provide service to small developments of vacant
land within the service area. As in the case of Hackberry, the surrounding land use is very
low density rural residential. There is design capacity in this system only to service the
existing vacant residential lots with no capacity allocated for any future system expansion.
These 65 units flow directly into the Wayzata system and are therefore not included in the
design capacity of the Orono-Long Lake Interceptor.
(Only minor revisions needed re Wayzata system)
Need to add and detail the following as separate systems:
5. Minnetonka Bluffs/West Femdale/Edcewood Hills/Woodhill CC System
6. County Road 15 Marinas System
7. Cr\'stal Bav System including Heritage and Bavridge
8. Bracketts Point System
9. Orono Orchards System
The municipal sanitary sewer design capacities listed in this plan are those ultimate
capacities utilizedfor final design of the Orono-Long Lake interceptor.
A major function of Orono's 1977 Comprehensive Sewer Plan was the engineering review
and analysis of the ultimate design capacity of the Orono municipal sewer system as a
necessary criteria for the final design of A/fVCC’s Orono-Long Lake Interceptor.
The municipal .system was analyzed by McCombs-Knutson Associates to determine the
actual number of existing and potential users, the crit ical pipe s ize and s Iope. the lift station
capacities and the expectable rates for average and peakflows. The study methods and raw
data are assembled in the appendix section of this CSPP as they appeared in the 1977 CSP .
The net system capacity is summaried as follows:
I
CMP 6-39
I
I
I
r
r
I
I
\
I
OLD TABLE, NEEDS UPDATING
TOTAL ORONO MUNICIPAL SEWER SYSTEM CAPACITY
SYSTEM
EXISTING
UNITS-1980
RESERVE
UNITS
DESIGN CAPACITY
2000
SW Orono
Orono Schools
Hackberry
Orono Injector(s)*
1,511
100
25
0
1,099
120
0
163 (future)
2,610
220
25
163
Total Orono Flow
to Orono-Long Lake
Interceptor 1,636 1,382 3,018
Compare to Interceptor
design capacity assigned
to Orono
Wayzata System
TOTAL ORONO
54
1,690
(3,025)
65
3,083
NOTES:* Injectors are city-owned lift stations which will pump into the
interceptor. They will be located as required to serve existing isolated
pockets of development along the lakeshore if a future need arises to
provide alternative sewer serv ice to these areas.
1,230 units available now plus 163 future units at injector stations.
-INSERT NEW TABLE HERE-------------------------------
CMP 6-40
*'
-ja.
SEWER FACILITIES PLAN
Oron o*s plan for fatqre sewer facilities is co usistent with the existing loc al and
metro po litan sewer facilities capacities: is co muteut with Oron o 's natural features and
enviro nmental preservation plans: and is con sistent or ith all ot her elements o f Oron o*s
Com munity Management Plan.
The existing sewer system capacity is sufficient to acco mmod ate all fore cast population
growt h and urban develop ment witho ut requiring increased municipal or interceptor
capacity.
Orono*s Plan for future sewer facilities will require specific up2rades to existing
local sewer facilities, but is not expected to require additional capacity allocation
in metropolitan sewer facilities. Anv potential need for additional capacity in
metropolitan systems is tied directly to changes in the Land Use Plan which will
allow for increased housing density. The increased housing density is necessary
in order to meet identified City housing needs as well as to be consistent with the
Metropolitan Council ’s life-cvcie housing goals.
The existing population and household ratio is split 00% urban and 40% rural 65% sewered
and 35% using septic systems. There are estimated for year 2000 now 2,430 approximately
3.020 full time households residences in Orono of which 1,450 1.950 are connected to sewer
and 980 1.070 utilize on-site systems. Even if all of the Metropolitan Council's forecast
growth of 750 new households between 1980 and 2000 were to be located in the urban area,
the exis ting 1,230 available sewer units would be sufficient to prov ide for this growth:
In terms of Residential Equivalent Connections or REC’st I REC = 274 gpd= lOO.OOOgpv).
Orono in year 2000 is estimated to have 2.420 REC’s (as compared to 1.987 REC’s in 1990)
which translates to an annual flow of 242 million gallons per year. Orono’s actual annual
flows for 1985-98 are shown in Table
The eSPP element of the 1980 CMP indicated an ultimate interceptor design capacity
assigned to Orono of 3.025 units based on a flow of 368 gpd per unit (115 gal/person/day
X 3.2 persons per household) totaling 1.14 mgd or 416 million gallons per year (mgv).
Current Citv forecasts as shown in Figures and_____indicate that Orono’s estimated
annual flows for 2000. 2010 and 2020 are expected to be equal to or less than the flows
anticipated bv Metropolitan Council in the Water Resources Management Plan.
In addition to the-abcrv e-absoliite capacin*. Orono has sufUcient rural land ava ilable to
permit all or most of the forecast devel opment to occur in the rural area at exis ting rural
densities consistent with rural land use. env ironmental protection and permanent on-site
sesv er system operation. Recentdev elopment trends lu»e witnessed approximately 60% of
the annual residential develop ment occurring in the rural area:
Orono has sufficient land available in the Rural Area for the level of rural unsewered
development currently forecasted. Likewise. Orono has sufficient land in the existing
urban area and in the few areas proposed for conversion from rural to urban
development, to allow For the forecast levels of urban development. The urban and
CMP 6-41
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
J
rural development forecasts have been derived from careful analysis of available land
on a parcel bv parcel basis, takine into account recent development trends and the
City ’s intended development types and densities for each parcel.
In the period 1980-1999 Orono added approximately 500 new residential connections
to the municipal sewer system, the majority of which were the result of installation
of sewer lines to serve existing residential development. Many of the neighborhood
housing clusters served were adjacent to a metropolitan interceptor and made use of
interceptor injector stations.
In the period 2000-2020. a poiuon of the anticipated residential connections will be
from the few remaining urban-densitv housing clusters in the rural area: but the
majority of new connections will be from newurban-densitv residential development
occurring along the Highway 12 corridor in north central Orono. The primary
impacts will be to the LS-60 interceptor service area. While Orono’s other
interceptor sei^vice areas will experience only modest flow rate increases. Orono
flows to LS-60 are expected to more than double bv 2010. primarily due to new
residential development, but partially due to additional commercial and institutional
developemnt. Because most of the planned urban-densitv housing in this area is
expected to develop in the next 10 years. Orono’s total flows are expected to be at
the high end of Met Council’s flow estimates for 2010. but nearer the low forecast
for 2020 (see Table ).
The combina tion of thg-^v; factors , plus the interceptor injector statio n ca paci ty, will
permit connection of certain exis ting housing clusters al ong the interceptorroute plus
providing-cap a city fernonTesidential urban development, all within the confines of
€>rono^s land use plan and the interceptor design ca pa city.
Orono’s projected sewer facility use and reserve capacity needs-is are indicated in the
following table. Two populati on Population and household projections are shown:
the first is based upon the Nletiv^politan Council's projected population level: the
second (lower) figure is the City of Orono's projection included. These are based
upon actual Kiiilding pemiit records for the last ten years , as well as on City
expectations to: future development based on current and planned zoning.
CMP 6-42 I
I
I
I PROJECTED SEWER FACILITY USE AND CAPACITY REQUIREMENTS
POPULATION
Sewered Septic Total
HOUSEHOLDS
(Includes vacant, i.e.
total dwelling units)
Sewered Septic Total
SEWER UNITS MGY MCY
Residential Non-Residential Total Actual Forecast
EXISTING DEVELOPMENT 1980-1990
1980 Actual *3,975 2,870 6,845 1,437 1,036 2,473 1,437 240 1,677 - 168
1990 Actual *4,430 2,855 7,285 1,692 1,095 2,787 1,692 295** 1,987 196' 199
FORECAST DEVELOPMENT 2000-2020
2000 pph»2.74 5,050 2,750 7,800 1,950 1,070 3,020 1,950 470 2.420 - 242
2010 pph»2.65 6,100 2,950 9,050 2,445 1,185 3,630 2,445 625 3,070 - 307
2020 pph»2.50 6,100 3,200 930 2,595 1,.^55 3,950 2,595 670 3,265 - 327
Assumptions made in the above table:
1) 2000 Census will confirm a year 2000 population of 7,800 persons living in about 2,800 homes, with an
additional 220 homes vacant
2) During the period 2000-2010, Orono will build approximately 600 new dwelling units, an average of 60
units per year, significantly higher than in the past few decades due to the added higher density housing in the areas along Highway
12. Of these 600, approximately 400 will be developed with sewer and 200 will be developed with septic systems. During the
decade, approximately 85 existing homes will be connected to municipal sewer, for a net increase of 115 in homes using septic
systems of. 1 he vacancy rate will remain at a constant 6%; and persons per household will drop to 2.65 by year 2010.
3) During the period 2010-2020, Orono will build 320 new dwelling units, an average of 32 units per year.
Of these 320, -tO will be developed with sewer and 280 will be developed with septic systems. During the decade, 110 existing
homes will be converted from septic to sewer, for a net gain in septic systems of 170. and a net gain in sewered households of 150.
The vacancy rate will stay at a constant 6%; and persons per household will drop to 2.50 by year 2020.
» •
c
Map No. 6 Figure__indicates the location of the Metropolitan Urban Service Area
(MUSA) and the Metropolitan Setici SeiTicc Region within Orono for year 2000 and
beyond.
The MUSA and MSSR are consistent does not coincide with the boundary beuveen urban
and rural Orono as exists in fact and as maintained by the policies and objectives of ^
discussed elsewhere in this the Community Management Plan. As indicated in the
preceeding table, forecast growih in sewer facility use will occur primarily within the
Orono’s Urban Service Area, but may also o^cur in the Rural Ser\ ice Area as existing
housing clusters are connected to the Orono-Long Lake Interceptor.
Sewer facilities planning for urban Orono is oased upon inventory and analysis of the
ten various contributing areas to the existing municipal system.
The invcntoryofthee.xisting municipal sewer system capacity ineludedanalysis of expected
urban development and increased sewage flows shown as reserv e eapaetty m the tables on
CMP 6-43
1999 Projection: Sewer Connections and Wastewater Flows 2000-2020
(By Interceptor Service Area)
Interceptor Service Area Exuting
Connections
1999
(RECs)
Projected Connections (EEC's)
2000 2010 2020
Metro Lift Station 59 (Orono)1682 1712 1784 1829
Metro Lift Station 60 (Long Lake)298 383 928 1068
Downstream Interceptors
(Direct conects to 7113 and 7113 A)
206 247 284 291
Wayzata Direc: Connections 69 69 71 71
Plymouth Plrect Connections 5 5 5 5
Total EEC’s 2260 2416 3072 3264
Total Flow Rate (MGY)226.0 241.6 307.2 326.4
1996 Met Council Forecast: Flow Range:
Yearly Wastewater Flows (MGY)
LOW HIGH LOW HIGH LOW HIGH
241 287 265 307 334 359
I
I
I
I
1
I
I
I
1
Forecast EEC's 2000-2020: Residential & Non-Kesidential
Interceptor Service
Area
2000 2010 2020
Res.Non-Res.Res.Non-Res.Res.Non-Res.
L.S. 59 1557 155 160.-*177 1642 187
L.S. 60 110 273 515 413 595 473
Downstream Interceptors 217 30 252 32 259 32
Way/ata Direct 69 0 71 0 71 0
Plymouth Direct 0 5 0 5 0 5
Subtotals (Rounded)
1950
470 2445 625
2565
695
Total REC*s 2420 3070 3260
I
I
I
PROJECTED SEWERED POPULA TION2000-2020
Interceptor Service Area 2000
(pphs2.76)
2010
(pphB2.65)
2020
(pph«2^)
Lift Station 59 (Orono)4025 4000 3875
Lift Station 60 (Long Lake)285 1275 1400
Downstream Interceptors 560 625 625
Wavr.ta Direct 175 175 170
Plymouth Direct 0 0 0
Total 5045 6075 6070
Source: City estimates, 1999
PROJECTED SEWERED HOUSEHOLDS 2000-2020
li..crceptor Service Area 2000 2010 2020
Lift Station 59 (Orono)1557 1607 1642
Lift Station 60 (Long Lake)no 515 595
Downstream Interceptors 217 252 259
Wayzata Direct <9 71 71
Pivmouth Direct 0 0 0
Total 1950 2445 2565
\fct Council Projection 1997 ^000 2200 2800
Source: Cit> estimates
PROJECTED SEWERED EMPLOYEES 2000-2020
Interceptor Service Area 2000 2010 2020
Lif*. Station 59 (Orono)350 350 350
Li* Station 60 (Long Lake)1015 1095 1115
Do nstream Interceptors*20 20 20
Wayzata Direct**10 10 10
Plymouth Direct 5 5 5
Total 1400 1480 1500
SoL.-v:: Met Council 1997 Estimates; City projections.
• Docs not include employees of Woodliill CC, which is located in Wayzata but
disc! irgcs to Orono sewer system.
••D 'ot include employees of Wayzata CC, which is located in Orono but
discharges directly to Wayzata sewer system.
ex pected urban development and inereased sewage flows shown as reserve capacity in
the tables on Page and in the CSPP Appendix. The 1999 review of Orono Sewer
Connections (See Appendix ) included an analysis of expected development within
each of the 31 existing MUSA areas as well as the areas proposed to be added to the
MUSA. For purposes of sewer facilities planning, this expected growth is divided into
f9t»r five categories:
1) INCREASED FLOW FROM EXISTING USERS. In the case of building
expansion or increased occupancy, higher flows could be expected through
existing service co inections. No new municipal sewer facilities are required.
2) INFILL URBAN DEVELOPMENT. In the case of development of existing
vacant urban properties, new connections can be expected through existing
service stubs. No new municipal sewer facilities are required.
3) NEW URBAN DEVELOPMENT. Certain areas within the existing and
proposed Urban Service Area are und'^veloped or developed at less than the
zoned densities. New sewer later <s can be expected to be e.xtended into these
areas as identified on Map No. 11. Facilities plans for this growth are discussed
below.
4) EXISTING UNSEWERED DEVELOPMENT. As of this datc,-thcfe are thfcc
small pockets of ex isting residential dcvelopmenHvtthin the urban area which
are not provided with scwcf lateral scfviee. Facilities plans for eonneetton-ef
these units arc discussed beimv. Within Orono’s urban service area, virtually all
existing developed areas ha\ e been provided with sewer lateral service.
However, within the rural ser\ ice area a number of developed properties which
are now (or arc proposed to be) within the MUSA have vet to be provided with
municipal sewer laterals.
5} NEW SHORELAND DEVELOPMENT. A number of properties within Orono’s
rural service area are also within defined Shoreland areas and have been
incorporated into the MUS.A to allow their development at rural densities with
municipal sewer.
Sewer facilities planning for rural Orono is the function of the on-site management
program.
The Metropolitan Council’s Water Qutdity .Management Policy 13 (Pg W12/79) states
that "THE PREFERRED METHOD OF WASTEWATER DlSPOSAfc FOR-NBW
RURAL DEVELOPMENT IS THE INDlVlDUAh-QN SITE SYSTEM”. Consistent
with this philosophy, and with Orono's commitment to maintenance of permanent rural
area.s in the community, Orono has in 1978 pioneered in the establishment of a full-
service On-Site Systems Management program designed to assure the continued
performance of on-site systems.
In terms of sewer facilities planning, the On-Site Systems Management Program can be
divided into four categories of activity:
CMP 6-44
I
p
NEW SYSTEM LOCATION, DESIGN AND CONSTRUCTION
REGULATIONS. All new rural subdivisions and individual building
development is subject to strict compliance with the standards of Orono's On-
Site Sewage Treatment Code ordinances and MPCA Rules Chapter 7080 to
ensure proper, permanent sewage treatment without requiring extension of
sanitary sewer. Residential density is no leas th an 2.0 aercs of dry, buildable area
per dwelling.
f ^
I .
I
2) EXISTING SYSTEM INSPECTION AND MAINTENANCE PROGRAMS. All
properties not connected to municipal sewer are required to have and maintain
on-site sewage treatment systems which operate according to accepted standards
for public health and environmental protection. The On-Site Program includes
educational campaigns to teach proper system use and maintenance. The On-Site
Program includes periodical City inspection of each operating system to review’
actual conditions and to enforce adequate treatment regulations.
3) HOUSING CLUSTER IDENTIFICATION. Orono’s 1980 CSPP identified as
many as 16 rural housing clusters which Map N»: 12 indicates 1 6 exist ing-ru fal
housi ng cluste rs wh ich have been identified by4hc On-Site Management
Program as h aving developed prior to adoption of current zonine standards at
less than the recognized 2.0 acre rural density. Because of restricted lot sizes,
these areas have had more operational restrictions and fewer replacement
options than the typical rural development, h ence they are scheduled for more
frequent City inspection. To date. City inspection records indicate that the
mcidenee of operational defieieneies is no greater in most of th ese housin g
eittsters-tha n in thc -general'ru ral area. In those few eajcs whe re operational
problems do affect a significant percentage of th e properties in any one
neighborh ood, the area has been designated for Alternative aste Management
Studies as diseu ssed below. All but one of the 16 identified housing clusters
have since been subject to an Alternative Waste Management Study as discussed
below, and have -^ince 1980 been incorporated w ithin the MUS.A and either
provided with municipal sewer or are scheduled for sewer nstallation in the near
future.
OPERATIONAL DEFICIENCY IDENTIFICATION AND CORRECTION. The
City inspection program and records of site limitations, system locations,
complaints and/or tank pumpouts combine to effect early identification of
individual on-site systems having operational deficiencies and'or housing
clusters having potential for neighborhood sewage treatment problems.
Whenever such problems arise. City ordinances provide that it is the property
owner’s responsibility to correct the situation, prcferrably without such
correction becoming a burden on the neighborhood or the general public. The
first, least burdensome option is individual correction of individual problems.
When a potential problem exists in an entire neighborhood however, the City
becomes involved in Alternative Waste Management Studies before ordering
expensive individual repairs.
Rural facilities planning includes alternative waste management studies.
The objective of public involvement in sewage disposal is to provide assurance of
CMP 6-45
treatment methods and levels sufTicient to safeguard the public health and the natural
environment. The objective of sewage treatment planning is to determine the most cost-
effective treatment method consistent with the primary goal and with the City's other
planning objectives. In urban areas, the preferred method is obviously central sewerage.
In rural areas, at rural densities, the preferred method is individual on-site treatment and
disposal. Where older, developed housing clusters exist within otherwise rural areas,
sewer facilities planning requires the study of a wide range of alternative treatment
methods.
Orono's Alternative Studies include an inventory and analysis method similar to that
included in the MWCC's 201 Alternative Waste Management Systems Evaluation Study.
Acceptable solutions for treatment difficulties include the follow ing list of options:
Alteration of the water consumption habits of the users, coupled with careful
system maintenance.
2)
3)
Repair or reconstruction of individual systems.
Replacement of existing systems with new individual systems constructed to
new City (WPC-40) City and State standards.
Installation of innovative on-site systems inc ludin g eonst dcfatien-e^ mpostin g
Of in cin erating devices within guidelines established in City codes and MPCA
Rules Chapter 7080.
5)
6)
Installation of individual holding tanks with off-site disposal.
Installation of a collection system and a community drainfield (only where
municipal sewer is not a viable option).
Installation of a collection system connected to the metropolitan int cfceptor
sewer system.
8)Condemnation and demolition.
All of the foregoing options are self-contained, on-site alternatives e.xcept the connection
to municipal sewer. The Metropolitan Coun cil's Water Quality Man agement Policy 11
(Pg. W12/7 9HiHew9 the connection of ex istin g rural de^■clepn1 cn ^ into th e inte rceptor
system if iden tified in th e CSPP. Orono's Rural Sewage Treatment Peltey H- Policies
allows consideration of such a connection as one alternative to solving a documented
health hazard should the on-site systems fail to function properly. In no case would such
sewerage foster new development, it would only be used to correct existing deficiencies,
and then only if this option is cost effective compared to the other viable alternatives.
Orono has-idc ntified five rural hou sing clusters for ahrrn ative waste mana gement
studies.
In certain-ho usin g clusters, poor soil or topography condi tion s combine with relatively
small lot sizes to inc rease th e likelih ood of system failures wh ile at th e same time
reducing th e option s-avatlable for repair cr replacement . -In oth er areas, in divich fitHot
sizes do not confor m to th e Minnes ota's DNR's Muni cipal Sh orelan d Managemen t
CMP 6-46
L.
I
I
I
1
1
1
I
1
I
I
I
I
L
y
criteria which suggests a minnmtm tot size of20,000 gq. ft. within 1,000 ft. of General
Development lakeshore.
The five clusters identified forftirther study In* the On-Site Management Program are
shown on Map No. 12 and are listed as follows
+:-------Stubbs Da^-------------------------
o V T ^i_ oi_ - o r*—n*
----------59 homes
A.. r^ortn Ignore iSl ^coten i me 1 uomes
voiai uajf
w:-----------UIUIV1I5 uay-----------------------------------JU I1U11IC5
Prlmnctonkd Uluiis ilOlllCS
TOTAL-----------------------------------------------200 homes
Of these five. No. 2 & No. 4 generallv oinform to the DNR's minimum lot size, but do
have water tablc'^PolylenTS^Jceausc of^eneraH^ low-l^ in§ topography* Of these fivCi all
c veept Stubbs Day lie adjacent to the Or>rno-Long Lake Intereeptor as built, which factor
w as one of the primary reasons Orono supported this final routing and so strongly
opposetlThe^ort^ntal interceptor routing the center of an""tmde\ eloped’Ttiral''areat
The remaining eleven housing clusters identified m the On-Site Management Program
are being monitored but have not exhibi ted signs of neighborhood system difficulties and
have therefore not been scheduled for alternativ e s^slcin evaluation* The existing oii“Sitc
systems are working or are capable of being replaced with acceptable individual systems
meeting current design and operating standards:
Alternative wastewater treatment studies are audenvay in all of the five identified'
clnsters;
1974 ORONO GROUND WATER STUDY by NieCombs ICnutson Associates. This study
was commissioned to gather ground water contamination data from the Ditnvns Day, Ciystal
Day and Sttibb? Day Areas. Samples were taken and analyzed from vanons properties
having on»site systems and compared to well samples and lakewater control samples. The
study found that shallow groundwater wcntamination was present but that lake or wellgrounowarer «.vi
lontamination was not. The study cer.cluded that systems l>*mg near to the shore,
particularly if below lake level, were deli^ering insufficiently treated water into the lake but
that the total influence was small with insignificant effect on public health. Those portions
of the Crystal Day Area removed frum the shoreline'(which have sandy soil) sho%ved little
shallow- ground water eoncentrations and better' treatment levels despite the more
concentrated density' of the area.
1975 PRELIMINARY SANITARY SCWTR CNGft<JCCRrNG REPORT b>‘ Mc€ombs
Knutson Associates. This study was commissioned as a feasibility* study for alternative
solutions to waste disposal from the Stubbs Day Area. Two alternatives were explored
ins'oK'ing the construction of a coliccticn system with either a community diaiiificld orn
connection to the (then proposed) Oror.O'Lone Lake Intereeptor. This study was never
implemented because at the time, the MPCA w as not in a position to appro\ e the coiiimunity
svstem and the final route of the interceptor had not been dctemiined.
19 77 ORONO COMPRCIILNSI VC SENS CR PLAN identified the final preferred routing for
the Orono'Long Lake Interceptor so as to pass within connecting distance of all of the study
CM? 6-47
(
!
areas exc ept Stubbs Da>‘. These identified ho using clusters wo uld remain in the rural service
area until do cumented need for sewer service tnitiated feasibility studies:
1978 ON»SlTE-SEWAGC TREATMENTCODC ■ ORDINANCCNO. 210. A full-time On-
Site Manager was added to the City staff in the Spring o f 1978 to implement the new
or dinance and the pro vision s o f the CSP calling for o n-site system inspectio n pro grams. Tlie
first area-wide inspectio ns'in 1978 and 197 9 were do ne in the identified ho using clusters
with ex tensive record s and do cumentation developed o n cach system and each area. This
actual field data resulted in the identification o f the 5 areas currently tmder stud>% and the
ranking o f prio rities for thos e studies.
1979 STUBBS BAY STUDY AREA MORATORIUM ORDINANCE NO. 219. on Ja nuary
23, 1979, the entire Stubbs Bay Area was placed under a construction and develo pment
mo ratori um-rcstrieting any new development o r ex pansio n of ex isting uses pending
com pletio n of studies on several issues, but particularly including the necessity fo r reso lving
sewage treatmentdefieicneic»in the area.-Thta mo rato rium has been exten ded through Ju ly;
1980r-ln-December, 1979, an exh austive 93 page resolut ion No. 1099 was ado pted which
included directio n to "co ntinue all necessary effo rts to assure that sewage treatment o r
collect ion in the Stubbs Bay Area is adequate to prote ct vtatcr quality* and the public health*'.
I979S'H1BBS BAY PREL1M1NAR¥-REP0RT UPDATE by Bone stro o ; Ros ene, Andcriik
& Assoc iates. Utilizing new so ils-info rmatio n, new data from the-on -Site Management
Prog ram and the final Intercepto r locatio n, this brief repo rt updated-the design and co st
analysis of the 1975 McCombs study. Project costs were estimated at between $6,000 and
$13,000 per unit with the intercepto r con nection and co mmunity drainfield co sts being
com parable;
1980 SANITARY-SEWER FEASlBtfcffY REPORT by Bo ncstroo,-Ro scno; Anderlik &
Assoc iates.-In 1979, the On-Sitc Prog ram identified seriou s sewage treatment deficiencies
and system failures in the Minneto nka Bluffs-Wcst Fcmdale (Bro wns Bay) Area.
Neighbo rhood meetings wereealled-and a co nsensus given to investigate po ssible municipal
sewerage. The City Engineer's Feasibility- Study has been co mpleted-indicating the
pos sibility of a sewer project serving 56 units at an average cos t-of between $9,745 and
frl6r700 per-unit."Public hearings are pending:
1980SAN1TARY SEWER FEASIBILITY REPORT fo r the No rth Sho re Drive/Seoteh Pine
Area-has been o rdered by the City Cou ncil as of February, 1980;
1979-PRELIMINARY ENGINEERING REPORT FOR THE CITY OF-MEDINA by
Me€o mbs Knutson .Assoc iates. The City of Orono has signed an agreement with the cities
q1~ Medina and Long Lake to participate in the solut io n of a sewage treatment problem in
the Mo mingside ncighbo rhot>d of Medina. This report and pro pos al will- result in the
co nstructio n of sewers in the Medina neighbo rhood; a eenneetion bct>vecn Medina and
Orono 's e.ststing Orono Seho el's system; and a new bypass line in Long Lake. The net result
o f this"for €>ro no is a permanent eonn eetio n of Oron o's Haekbcrty Hills Area to the Lo ng
Lake system and the ability fo r Oro no to utilize the capacity within the existi ng Orono
Schoo l's lines which ts no w limited by-bottic neeks in the Lo ng-Lake System.
implementatio n is a^-aiting federal grants fo r Medina and is planned for eo nstruetio n in
4980"o r 1981.
1
1
► •
CMP 6-48
I
I
I
I
r
I
I
I
I
I
I
I
Rural facilities planning has resulted in the ability to maintain the long-term viability
of on-site system usage in Orono ’s rural service area.
The result of providing municipal sewer to individual scattered neighborhoods within rural
Orono has been elimination of pressure to "sewer rural Orono”. The historically high-
densitv neighborhoods have been or will soon be sewered, and the vast majority of
remaining properties in rural Orono contain adequate land for lone-term use of on-site
sewage treatment. The Citv has identified those existing on-site systems which are
nonconforming, and will continue to make steady progress towards replacing them with
conforming on-site systems.
Residential development in Orono’s 2-acre zones is expected to continue at a slow, steady
pace for the next 20 years, at which time little additional land will be available for
development. In the S-acre zone, only scattered subdivision opportunities remain, with a
potential for no more than 30-40 additional homes to be constructed.
■new table-
Summar}' of Rural Facilities Planning 1974-1999
Year Planning Activity
1974 ORONO GROUNDWATER STUDY by McCombs Knutson Associates, studied groundwater
contamination from Stubbs Bay, Crystal Bay and Brown’s Bay; concluded that lake and well
contamination was not present, but shallow groundwater contamination was present which could
lead to insufficiently treated water reaching the lake from near-shore systems.
1975 PRELIMINARY SANITARY SEWER ENGINEERING REPORT BY McCombs Knutson Associates,
reviewed alternative solutions for was ewater treatmnet in the Stubbs Bay Area. Proposed either
connection to (then proposed) Orono-l.ong Lake interceptor or installation of a community drainfield
system. Neither solution was implemented; MPCA was not in a position to approve the community
system and the interceptor route was not > ?t determined.
1977 ORONO COMPREHENSIVE SEWER PLAN identified final preferred route of Orono-Long Lake
interceptor to pass near all rural cluster study areas except Stubbs Bay, allowing for future neighborhood
connections.
1978 ON-SITE SEWAGE TREATM.ENT ORDINANCE NO. 210 adopted, full-time On-Site Manager hired,
first area-wide inspections completed in 1978-79 resulted in identification of 5 rural clusters needing
further stu_v.
1979 STUBBS BAY STUDY AREA MORATORIUM established to restrict new development or
expansion of uses pending completion of study to resolve sewage treatment deficiencies in the
area.. Preliminary report by Bonestroo, Rosene, Anderlik & Associates updated the 1975
McCombs study as to costs.
1979 cn Y OF MEDINA PRELIMINARY ENGINEERING REPORT resulted in the Orono-Long
Lake-Medina Sewer Agreement to allow permanent connection of Orono s Hackberry Hills
neighborhood sewer to the Long Lake sy stem, and allow ed construction of sewer connection
from Medina's Momingside neighborhood to Orono/Long Lake system. Resulted in the
construction of a new by-pass trunk line through Long Lake, w ith allocation of units to each
citv.
CMP 6-49
1980 MINNETONKA BLUFFS-WEST FERNDALE ALTERNATIVE WASTE MANAGEMENT
STUDY resulted in the construction of sewers in the Minnetonka Bluffs, West Femdale and
County Road IS Marina areas in 1981-82. The CMP was amended in 1981 to incorporate these
areas into the MUSA.
I
I
I
1980 NORTH SHORE-SCOTCH PINE ALTERNATIVE WASTE MANAGEMENT STUDY
resulted in construction of municipal sewer to serve lakeshore properties along North Shore
drive in 1981-82.
1985 CRYSTAL BAY ALTERNATIVE WASTE MANAGEMENT STUDY resulted in construction
of municipal sewer to serve the Crystal Bay neighborhood in 1986-87.
1988 STUBBS BAY ALTERNATIVE WASTE MANAGEMENT S fUDY resulted in 3 years of
discussion before actual construction of municipal sewers to ser\ e the Stubbs Bay area in 1992.
CMP Amendment No. 4 brought the Stubbs Bay area into the MUS.A in 1992.
1993 ORDINANCE 118,2'^'^ SERIES required upgrade within 2 years of on-site systems not meeting
3' separation from seasonal water table. ORDINANCE 120, 2^^^ SERIES susbsequently placed a
moratorium on enforcement of Ord. 118 pending review of "hot spot" areas within City which
might be better served by municipal sewer than by on-site system replacement.
1994 "10 HOT SPOTS" ALTERNATIVE WASTE MANAGEMENT STUDIES resulted in City
action to delay replacement of nonconforming septic systems in 10 identified rural
neighborhoods where it was concluded that long-term sewage treatment should be via municipal
sewers rather than on-site methods. These 10 neighborhoods each included e.xisting
development at densities greater than 1 unit per 2 acres, and each were found to have substantial
difficulties in replacing e.xisting septic systems due to lot size, topography, soil conditions or
proximity to the lakeshore. Resulted in CMP Amendment No. 6 in 1996 to incorporate all 10
neighborhoods into the MUSA. Also resulted in Met Council granting Cit>’ use of 50 undefined
REC’s for connection of individual properties located outside MUSA but adjacent to sewer.
1995-
1997
NEIGHBORHOOD MEETINGS resulted in establishment of a schedule for provision of
municipal sewer to 10 "hot spot" neighborhoods.
1997-
1999
CONSTRUCTION of municipal sewers to serve 7 of 10 "hot spots": North Long Lake, Long
Lake Countiy Club, Bay Ridge, Foxhill, Bracketts Point, Orono Orchards. Edgewood Hills.
1998 CMP AMENDMENT NO. 8 added the northeast shore of Ma.\well Bay to the MUSA to allow
connection of existing and future shoreland development to municipal sewer system.
EXPECTED SEWER IMPROVEMENTS
Based upon the existing sew er facilities of the City, the Metropolitan Interceptor capacity
assigned to Orono, and the foregoing .Alternat ive Wa ste Ma nagem ent Studies. Citv ’s plans
for future development, the following improvements as shown on Ma p No. 13 Ficure
are expected to be constructed in the foreseeable future:
+T MINNETONKA--BLUFFS - Construction of g ra\ ity flcwer late ra ls servin g 33-2S
existing units v ia a ir injector stat ion into the Oreno-Long Lak e Interceptor.
Expected construction yea r; 19 8 1 • 19 82 :
CMP 6-50
I
I
I
t «
I •
fr
ft
97
1.
1
4.
5.
BROWNS BAY - Construction of combination gravity and force main sewer
laterals along West Femdale, Shoreline Drive and Orono bane serving 30-33
existing units via the same injcetor station as-the Minnetonka Bluffs system;
Expected eonstruetion year 1981 - 19 8 2;
■NORTH SHORE/SCOTCH PINE- Construetion-of combination gravit>< and force
main sewer laterals serving twelve existing units via an injector station into the
Orono-Long Lake Interceptor. Expected-construction year 198 1 • 19 8 2.
CARMANS BAY ■ Construction of a grtnder pump station and lateral to extend
service to two existing units within the MUSA. Expected eonstruetion before 19 8 5;
NORTl lERN AVENUE - Construction of a gravity sewer lateral and a possible Kft
station to extend service to four existing units within- tnc MUSA. Expected
eonstruetion before 19 8 5.
NORTH SHORE/HIGH WOOD ■ Construction of a gravity sewer lateral to extend
service to four existing-unitssvithin the MUSA. Expected eonstruetion before 19 tt5:
-CARRIAGE TRAIL • Private developer extension of gravity sewer lateral to
service seven new units within the MUSA. Expected eonstruetion year: 19 8 0.
NAVARRO ■ Private developer extension of gravity sewer lateral to service 2 4 new
units within the MUSA. Expected eonstruetion year; 198 0.
■BALDUR PARK - Private devdoper extension of gravity sewer lateral to service
two new units within the MUSA. Expected construction year; 1980 -1981.
ORONO-MEDINA INTERCEPTOR • Joint tri-city project with Medina and Long
Lake including lateral sewer eonstruetion in Medina. Interceptor eonstruetion in
Orono and bypass eonstruetion in Long Lake. Expected construetion-year^l98H
49«3 t
WEBBER HILLS - Constniction of a lateral sewer system and trunk forcemain to
serxe 37 existing units within the MUSA. Expected construction vear: 2000.
FOX RIDGE - Construction of a lateral system and trunk forcemain to serve 7-9
existing units within the MUSA. Mav he designed to serve additional 7-10 units
which will be within future MUSA. Expected construction year: 2000.
EAST LONG LAKE - Construction of a lateral system and forcemain to serve 1C
existing units within the MUSA. Expected constniction year: 2002.
LAKE MINNETONKA WOODS - P'-j\.;tc develoner extension of gravity' sewer
lateral system to serve 29 towphomv, • 'lits within the MUSA. Under construction
in 1999.
BALDUR PARK - Private develoDcr/owncr construction oFgravity sewer lateral
to serve I existing and 2-3 future ut.its within the MUSA. Expected construction
CMP 6-51
year: 2001.
6.
7.
8.
9.
DANCOR DEVELOPMENT - Private developer construction of sewer lateral
system and trunk to serve 25 single family homes within MUSA. F.xpectcd
construction year: 2001.
HIGHWAY 12 CORRIDOR - Private developer construction of sewer trunk and
laterals to serve up to 250-300 units of multifamilv and commercial on north side
of Highway 12 between Willow drive and Old Cr\stal Bav Road. Expected
construction year: 2002-2005.
HIGHWAY 12 CORRIDOR • Private developer construction of sewer lateral and
trunk lines to serve 150-250 residential units on south side of Hiehwav 12 west of
Old Cry stal Bav Road. Expected construction year 2005-2010.
HACKBHRRY EXTENSION - Private developer construction of sewer lateral
system to serve 30-50 ne\s residential units cast of Willow Drive between
Watertown Road and Highway 12 Bypass.
SHORELAND AREAS - C itv/private developer construction of trunks and lateral
sewers to serve various existing and to-be-developed Slu~>reland areas in Lontt
Lake/Pickev Lake area, alone the northeast shore of Maxwell Bay, along the
northeast shore of Cr\stal Ba\. and along the shores of Tanager Lake. Expected
conrtniction year: 2010-2020.
EXISTING MUNICIPAL SYSTEM IMPROVEMENTS - Capital Improvements
to the existing municipal sewer system include the following:
a) Grindcf-pump replaceme nt; one eneh-'in 1980, 1981, I9 6-2 t
b) Lift stati on-upgra ding; depending upon (niieome of infiltrat ten study ex pected
in 1981;■ Lift-Stations 6. 8 and 10 mas -tnicd pump replace ment to increa se
ca pac ity for certa in sen’icc suba reas.
(NEED TO UPDATE THIS SECTION)
I
r
(NEED TO ADD SECTION DISCUSSING TRUNK/INTERCEPTOR
IMPACTS OF HVVY 12 BYPASS AND CITY PLANS TO ALLEVIATE
EXISTING CAPACITY DEFICIENCIES IN HVVY 12 AREA ON
TEMPORARY AND PERMANENT BASIS)
12. EXISTING INDIVIDUAL SYSTEM IMPROVEMENTS.- The On-Site
Management Program is expected to continue enforcing major improvements to,
or replacement of, 30-40 existing on-site systems each >ear for the licxt five
h ,1 years.
I
I
CMP 6-52
I
I
I
EXPEC -TfeD-NEW SEWER-GQNNEGTIONS EACH YEAR; 1980-1985
(ADD A NEW TABLE HERE FOR EXPECTED CONNECTIONS
BY YEAR FOR 2000-2010)
»*
•«
* •
M CMP 6-53
»
1
/0/4’^hlX /I
1999 Review of Orono Sewer Connections: Metro Lift Station 59 (Orono)
I
I
MUSA Part/Description Existing
Connections
1999
(RECs)
Projected Additional Connections (REC’s)
2000
Add Total
2000-2010
Add Total
2010-2020
Add Total
Part I: Navarre/Forest Lake/Tonkawa
1. Residential'
2, Non-residential
1382
153
+25 =1407
+2 =155
+25 = 1432
+20 = 175
+10 =1442
+10 = 185
Part XII: North Shore/Scotch Pine = 13 +0 = 13 = 13
Part XVI: Stubbs Bay 130 = 130 +2 = 132 = 132
Part XVll: Orono Sewer Plant Property +0 =+0 =
Part XXXI: Maxwell Bay Area +3 +25 = 30 +25 = 55
Total LS-59 RECs 1682 +30 =1712 +72 = 1784 +45 =1829
Total LS-59 Flow Rate (MGY)168.2 171.2 178.4
182.9
'Counted as follows:
Sec 5S: 32 Sec 8S: 1 "54 Sec I7S:246
Sec 6S: 56 Sec 9N; 5 Sec I8N:16
Sec7N: III Sec 9S: 33 Sec 20N:147
Sec7S: 216 Sec 16N: 5 Sec 20S:116
Sec 8N: 60 Sec 17N: 102 Sec 2IN:103
I
I
I
♦
¥4
i •
»
I 4
I f
I •
I •
1999 Review of Orono Sewer Connections: Metro Lift Station 60 (Long Lake)
MUSA Part/Description Existing Projected Additional Connections (REC's)
Connections
1999 2000 2000-2010 2010-2020
(RECs)
Add Total Add Total Add Total
Part II: Orono Schools/Industrial Park
1. Orono Schools, west side of OCB Rd.
2. Orono Industrial Park
50
69
+5 = 55
+0 = 69
+0 = 55
+25 = 94
+0 = 55
+25 = 119
Part III: Hackberry 26 +0 = 26 +0 = 26 +0 = 26
Part IX: Fulmer Property'2 +0=2 -2=0 +0 = 0
Part X: Highway 12 Corridor West
1 . Suganvoods Residential
2. Rebers Commercial (Outlot F)
3. Wear Commercial
4. Service 800
5. Onen Brothers
6. City Offices Complex
7. Orono Schools Annex
8. Orono Middle School
9. 58 Acres SW 6/Willow
10. 60 Acres on 12 (Willow to OCB) (Res.)
(Non-Res.)
22
0
32
3
12
12
2
0
0
0
0
+ 1 = 23
+0=0
+0 = 32
+0 = 3
+0 = 12
+0 = 12
+0=2
+75 = 75
+0=0
+0=0
fO = 0
+2 = 25
+30 = 30
+0 = 32
*0 = 3
+5 = 17
*5 = 17
+0 = 2
+0 = 75
+25 = 25
+100 = 100
+70 = 70
+0 = 25
+0 = 30
+0 = 32 1
-.0 = 3
+10 = 27
+0 = 17
+0 = 2
+0 = 75
+0 * 25
+25 = 125
+0 = 70
Part XI: Highway 12 Corridor East 0 +0=0 +3=3 +0 = 3
Part XIII: 650 Brown Road North 1 +0 = 1 +0 = 1 +0 = 1
Part XIX: North Long Lake 31 +0 = 31 +0 = 31 +0 = 31
Part XX: Long Lake Country Club 20 +0 = 20 +0 = 20 +0 = 20
Part XXI: East Long Lake 0 +0=0 +10 = 10 +0 = 10
Part XXIII: Fox Ridge 0 +0=0 +10 = 10 +0 = 10
Part XXIX: Orono Schools/Ice Arena 12 +0 = 12 +3 = 15 +0 = 15
Part XXX: Dillman Property 0 +0=0 + 1 = I +0 = 1
"50 Nop-MUSA Connections Allotment"4 +-4 = «+0 = 8 +0 = 8
Future MUSA Additions:
1. Van Ecckhout Property
2. Dumas/James Properties
3. Hackberry East
4. Long Lake Shorelancl
5. Dickey Lake Shoreland
0
0
0
0
0
+0=0
+0=0
+0=0
+0=0
+0=0
+8=8
+200= 200
+50 = 50
+0=0
+0=0
+0 = 8
+0 = 200
+0 = 50
+40 = 40
+40 = 40
Total LS-60 RFX's 298 +85 = 383 +545= 928 +140 =1068
Total LS-60 Flow Rate (MGY)29.8 38.3 92.8 106.8
1 REC = 274 gpd = 0.1 mgy
'Part :X: Fulmer Property will be eliminated from L.S. 60 upon completion of the Hwy 12 bypass before 2010.
1999 Review of Orono Sewer Conneetions: Downstream Interceptors
(Direct Connects to 7113 and 7113A)
MUSA Part/Description Existing
Connections
1999
(RECs)
Part VI: Mtka Bluffs/Orono LnAV. Femdale 53'+0 —53 +0 r=53 +0 r=53
Part VII: Co. Rd. 15 Marinas
1. Residential
2. Non-residential
3 + 1 4 +0 *4 +0 4
a. Windward Marina 6 +0 6 +0 ---6 +0 6
b. Genmar/Kings Cove 5 +0 5 +0 5 +0 5
Part VIII: Crystal Bay
1. Residential
2. Non-Residential
78 +0 78 +2 80 +0 80
a. Mtka Art Center 10 +0 10 +2 —12 +0 =12
b. Environmental School 4 +0 4 +0 =z 4 +0 r=4
c. Sailor's World Marina 4 +0 4 +0 4 +0 r=4
d. US Post Office 1 +0 =:1 +0 =1 +0 s=1
Part XVIII: Nettles Property 1 +0 —1 +0 r=1 +0 1
Part XXII: Orono Orchards 0 +15 —15 +10 =r 25 +0 =25
Part XXIV: Webber Hills 0 +20 =20 + 17 37 +0 =37
Part XXV: Edgewood Hills 8 +0 —8 + 1 =9 +0 =9
Part XXVI: Bracketts Point 16 +0 =16 +0 16 +0 16
Part XXVII: Foxhill 9 +3 =12 +5 =17 +0 —17
Part XXVIIl: Bayridge/Hartwood 8 +2 =10 +0 =10 +7 17
Total Direct Interceptor Connection
RECs 206 +41 247 f37 284 +7 291
Tota' Direct Interceptor Connection
Flow Rate (MGY)20.6 24.7 28.4 29.1
Projected Additional Connections (RECs)
2000
Add Total
2000-2010
Add Total
2010-2020
Add Total
'includes 3 units from 50-unit non-MUSA allocation; docs not include flows from Woodhill Countrj' Club which are
generated in Wayzata.
I
I
I
I
\
{
I
I
L
1999 Review of Orono Sewer Connections: Wayzata Direct Connections
MUSA Part/Description Existing
Connections
1999
(REC’s)
Projected Additional Connections (REC's)
2000 2000-2010 2010-2020
Add Total Add Total Add Total
Pari IV: Herrick Circle 6 +0=6 +0=6 +0=6
PartV: Chew Chase/Femdalc Green 58 +0 = 58 +2 = 60 +0 = 60
Part XIV: Fairway Hills Addition 1 +0=2 +0=2 +0=2
Part VI: West Femdale 3 +0=3 4-0 = 3 +0=3
Total Wayzata Direct Connection REC's f>9 +0 = 69 +2 = 71 +0 = 71
Total Wayzata Direct Flow Rate (MCVO 6.9 6.9 7.1 7.1
1999 Review of Orono Sewer Connections: Plymouth Direct Connections
MUSA Part/Description Existing
Connections
1999
(REC's)
Projected Additional Connections (REC's)
2000 2000-2010 2010-2020
Add Total Add Total Add Total
(TO BE ADDED TO MUSA 1999)
St. Edwards Church -
Co. Rd. 6 at North Femdale Road
5
r-fo111+0=5 •foIIC/ITotal Plymouth Direct Connection
REC’s
5 +0=5 +0*5 +0=5
Total Plymouth Direct Flow Rate (MGY)0.5 0.5 0.5 0.5
ORDINANCES, CONTROLS. ADMINISTRATION AND ENFORCEMENT
The Citj* of Orono has adopted ordinances and controls for proper sewage
treatment in both urban and rural portions of the cit>'.
On-site sewage treatment systems have been regulated by the City since 1961.
Municipal sewer connections have been regulated since 1964, the first year municipal
sewers were available. The following is a chronological listing of ordinances
applicable to sewage treatment in the City:
Ordinance Number & Date Ordinance Title and Description
Ord. 32 - November 13, 1961 REGULATING SEWAGE DISPOSAL SYSTEMS including site
evaluation, design and construction standards similar to WPC-40.
Ord. 35 - November 13. 1961 ADOPTING MINNESOTA PLUMBING CODE including requirements
for connection to available municipal sewer; standards for on-site
disposal; acceptable materials and methods; and licensing of plumbers.
Ord. 67 . July 27. 1964 PUBLIC AND PRIVATE SEWERS codifying above ordinances into the
.Vlunicipal Code.
Ord. 87 - August 22, 1966 ADOPTING SEWAGE DISPOSAL SYSTEM CODE including
additional design criteria and construction standards. See Appendix.
Ord. 101 - December 9. 1968 H ookups to public sewer requiring connection to available
public sewet. or annual inspection of on-site systems by a registered
engineer. SeeAppendix.
Ord. 125 -December 28, 1970 PROTECTING WETLANDS AND LANDS ABUTTING
MEANDERED LAKES AND WATERCOURSES including the
pre\ention of filling, dredging or alteration of the w etlands or
drainageways or on lands directly affecting such protected areas.
Ord. 143-M.irch 12. 1973 METRO SEWER - SAC establishing requirements for payment of SAC
charges to MWCC.
Ord. 152-August 27. 1973 DEFERRED SANITARY SEWER HOOKUP DATE allowing 16
months from availability of sewer until connection is required.
Ord. 210- April 13,1978 ON-SITE SEWAGE TREATMENT CODE superceding Ord. 87 with
state-of-the-art standards for soil evaluation, site evaluation, design and
construction, plus establishment of maintenance requirements and annual
City inspection program. Exceeds WPC-40 standards and
recommendations See Appendix.
Ord. 212 -June 15. 1978 METRO SEWER STRENGTH CHARGE establishing MWCC sewage
waste strength charges. See Appendix.
Ord. 213 -October26. 1978 FLOOD PLAIN M.ANAGEMENT updating ordinance 125 prohibiting
development in wetlands and flood plains and establishing procedures for
review of development on adjacent lands.
I
I
J
.1
I
.1
I
I
I
Ord.218-January 23, 1979 AMEND ORDINANCE 210 - minor language reyisions inclutimg
establishment of contractor qualifications. See Appendix.
Ord. 246-Dec. 30. 1982 ZONING - LAKE MINNETONKA ISLANDS - establishinc new zoning
and develoomenl standards for islands in I^ake Minnetonka, including
special sewaac treatmnet system standards
2nd Series Ordinances:
Ord. 1 - March 12. 1984 CODIFICATION - Ordinance 210 and subsequent revisions codiHcd as
Municipal Code Section 12.30
Ord. 34 -ADril27. 1987 SANITARY SEWER CONNECTION CHARGES - established charge.s
for connection to existing sewer svstem
Ord. 100-February 10. 1992 ON-SITE SEWAGE TREATMENT SYSTEMS - formally adopted
sections of Chapter 7080; established additional minimum standards Tor
design, construction, installation, operation and maintenance of ISTS;
required Cit> license for site evaluators, system designers and
contractors.
Ord. 101 - Februar%-24. 1992 ESTABLISHING REGULATIONS FOR THE MANAGEMENT OF
SHORELANDS includina establishcmcnt of more restrictive standards
for ISTS within shoreland areas.
Ord. 105-July 27. 1992 ALLOW AN EXTENDED TI.ME PERIOD OF HOOKUP FOR
STUBBS BAY SEWER - deadlines established for connection to sewer
bas:J on existing ISTS condition.
Ord. 118 -July 26. 1993 AMEND NONCONFORMING SYSTEMSREPLACEMENT to allow 2
full construction seasons for replacement of ISTS found to be nont
compliant due solelv to lack of 3' separation.
Ord. 120 - Sertember 13. 1993 MORATORIUM ON REOUIRING UPGRADE OF CERTAIN
(extended yia NONCONFORMING SEPTIC SYSTEMS during study to determine
Ord. 125 -March 14. 1994 and ut’" *'er certain higher densitx neighborhoods will be provided with
Ord. 128. ScDlember 12. 1994)rnt.-icipal sewer rather than replace septic s\ stems
Ord. 129 -October 24. 1994 ADD SUMP PUMP REGUL.NTIONS AND PENALTIES - prohibiting
di^^charec of sump pumps to municipal scuer s\stem
Ord. 147 -May 13. 1996 LICENSING OF ON-SITE SEWAGE TREATMENT
•
CONTRACTORS. ETC. - discontinued Citx licensing of ISTS
nrote-sionals due to commencement of State licensing; revised certain
definitions; revised standards for issuance of building permits, variances
and Cl 'Ps for properties with ISTS: extended timeframe for repair of 3'
sepa.-ation noncompliant sv terns from 2 sears to 10 set 's outside
Shoreland District.
Ord. 162 - Sentember 22. 1997 AMEND TIMEFRAME FOR UPGRADE OF NON-COMPLIANT
SEPTIC SYSTEMS WITHIN THE SHORELAND OVERLAY
DISTRICT - extended timeframe from 2 sears to 7 sears for replacement
of 3‘ separation noncompliant ISTS
(.
L
ORDINANCE NO. 210 APPLIES TO ALL PROPKRTIICS IN THK CITY PER
(2^
/
NEW SEWER CONSTRUCTION DESIGN STANDARDS
All new sewer connections are inspected to preclude and prevent inflow from roof
drains, foundation drains, yard drains, sump pumps and cooling water drains
consistent with State Plumbing Code and MWCC requirements. All new sewer
connections are inspected to assure use of proper materials and construction methods
to limit the probability of future pipe breakage, defective joints or other sources ot
infiltration.
All new sewer construction, both individual connections and lateral extensions, will
conform to the following standards to minimize infiltration as follows:
The maximum allowable rate of ground water leakage shall be 100 gallons a day per
inch diameter of pipe per mile.
Manhole castings in areas subject to frequent flooding shall be located a minimum
of two feet above the ground level.
Manhole covers in areas subject to frequent flooding shall be solid, without vent
holes.
Inflow connections as described above shall be prohibited. A copy of the minimum
design standards for sewers is attached in the Appendix.
Orono expects waste water strength to remain relatively low because of
primarily residential serv ice.
Less than 1% of the land area in Orono is designated as industrial and commercial.
The predominant sewage characteristics will be typically domestic. Concentrations
are expected as follows:
Biochemical oxygen Demand = 250 mg/I
Suspended Solids = 250 mg/I
The existing industrial park area serviced by the Orono School's system has the only
potential for increased waste water strength. In the event that some future user may
increase discharge strength, ordinance No. 212 provides lor extra-strength regulation
and charges consistent with .MWCC requirements.