HomeMy WebLinkAboutResolution 5639CITY of ORONO
RESOLUTION OF T�EICIZY9COUNCIL
NO. b 55
A RESOLUTION GRANTING VARIANCES
TO MUNICIPAL ZONING CODE
SECTION 78-1288 AND A CONDITIONAL
USE PERMIT PURSUANT TO MUNICIPAL ZONING
CODE SECTION 78-1286
FILE NO. 07-3284
WHEREAS, Thomas W. Ritchie and Kristen Ritchie, husband and wife
(hereinafter "the applicants") are the owners of the property located at 2507 Kelly Avenue,
within the City of Orono (hereinafter the "City") and legally described as follows:
Lot 3, Block 1, and Outlot A, Navarre Cove, Hennepin County, Minnesota
(hereinafter the "property"); and
WHEREAS, the applicants have made application to the City of Orono for a
conditional use permit pursuant to Orono Municipal Zoning Code Section 78-1286 to allow
grading within 75' of the OHWL in order to create a rain garden to manage the on site surface
water drainage; and
WHEREAS, the applicants have made application to the City of Orono for a
variance to Orono Municipal Zoning Code Section 78-1288 to allow 28.5% hardcover within the
75'— 250' zone where 25% is normally allowed and 30% currently exists in order to construct an
in -ground pool.
Minnesota: NOW, THEREFORE BE IT RESOLVED by the City Council of Orono,
FINDINGS
1. This application was reviewed as Zoning File 07-3284.
2. The property is located in the LR — 1B Residential Zoning District which requires
a minimum lot area of 1.0 acre and a minimum lot width of 140'.
Page 1 of 5
moo\
CITY of ORONO
RESOLUTION OF THE CITY COUNCIL
NO. 5639
3. The Planning Commission reviewed this application at a public hearing held on
April 16, 2007 and recommended approval of variances based on the following
findings:
a. The property contains 44,670 s.f. (1.0 acre) in area and has 150' in width.
b. A new home was constructed on the property in 2001 and the building permit
plans reflect a conforming 75' — 250' hardcover level of 25%. The applicants
are the current owners and purchased the property in 2006. At the time of
purchase the property contained illegal, non -conforming hardcover within 75-
250' and 250' -500' zones.
c. The hardcover variances as requested will result in a net reduction from the
existing non -conforming levels. The 250'-500' zone will be reduced from a
nonconforming level to a level below that which is allowed. The proposed
residence meets the structural lot coverage limitation of 15%.
d. The proposed pool complies with all LR -1B setback requirements.
e. The applicants are proposing to construct a rain garden and plant a 10' wide
native vegetative buffer along the lakeshore in order to alleviate some of the
surface water drainage issues as a result of the excess site hardcover.
4. The City Council has considered this application including the findings and
recommendation of the Planning Commission, reports by City staff, comments by
the applicants and the public, and the effect of the proposed variance on the
health, safety and welfare of the community.
5. The City Council finds that the conditions existing on this property are peculiar to
it and do not apply generally to other property in this zoning district; that granting
the variance would not adversely affect traffic conditions, light, air nor pose a fire
hazard or other danger to neighboring property; would not merely serve as a
convenience to the applicants, but is necessary to alleviate a demonstrable
hardship or difficulty; is necessary to preserve a substantial property right of the
applicants; and would be in keeping with the spirit and intent of the Zoning Code
and Comprehensive Plan of the City.
Page 2 of 5
CITY of ORONO
RESOLUTION OF THE CITY COUNCIL
NO. 5639
CONCLUSIONS, ORDER AND CONDITIONS
Based upon one or more of the above findings, the Orono City Council hereby grants a
variance to Orono Municipal Zoning Code Section 78-1288 to allow 28.5% where 30% currently
exists and 25% was previously allowed in order to construct an in -ground pool and patio as well
as a conditional use permit to allow grading within the 0-75' zone to construct a rain garden,
subject to the following conditions:
1. Council approval is based on the site plan and engineered plans submitted by the
applicants and annotated by City staff, attached to this Resolution as Exhibits A & B.
Any amendments to the site plan which are not in conformity with City codes will require
further Planning Commission and City Council review.
2. Hardcover in the 0-75' zone shall not increase above the level of 0 s.f. or 0%. Hardcover
in the 75-250' zone shall be limited to 7,079 s.f. or 28.5% per the proposed plan and
hardcover allowance summary as depicted on Exhibit A. Applicants are advised that any
future requests to increase hardcover or change the nature of existing/approved hardcover
shall require City approval, and increases in hardcover will not likely be approved
without concurrent reduction in existing hardcover.
Applicants shall remove all plastic or fabric liner material from the decorative landscape
beds on the property to ensure their permeability as non -hardcover surfaces.
4. Required removals of all structure and hardcover to be removed shall be completed prior
to the footing inspection for the proposed pool.
5. Submittal and approval of an as -built grading plan verifying compliance with engineering
and zoning approvals is required prior to the final inspection.
6. Authorities granted by this resolution run with the property not with the applicants, but
are permissive only and must be exercised by obtaining a building permit for the new
construction within one year of the date of Council approval, or the variance will expire
on that date (July 9, 2008).
7. Violation of or non-compliance with any of the terms and conditions of this resolution
shall constitute a violation of the zoning code, shall automatically terminate any authority
granted herein, and shall be punishable as a misdemeanor.
Page 3 of 5
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CITY of ORONO
RESOLUTION OF Tf� C,ITYEOUNCIL
NO. (J r
8. The undersigned applicants have read, understand and hereby agree to the terms of this
resolution and on behalf of the applicants and the applicants' heirs, successors and
assigns, hereby agree to the recording of this resolution in the chain of title of the
property.
Adopted by the Orono City Council on the 9th day of July, 2007.
ATTEST:
'J
Linda S. Vee, City Clerk J es M. White, Mayor
Pr6p,qfty Owner(s)
Page 4 of 5
STATE OF MINNESOTA
COUNTY OF HENNEPIN
CITY of ORONO
RESOLUTION OF THE CITY COUNCIL
NO. 5639
This instrument was acknowledged before me this 1 day of Au 2� 2007 by
Thomas W. Ritchie, husband of Kristen Ritchie.
JIJ''/!JJ!!IIlIJJJIJJIJIJI.F/lJ��
Notary Public
STATE OF MINNESOTA
COUNTY OF HENNEPIN
This instrument was acknowledged before me this / day of 2007 by
Kristen Ritchie, wife of Thomas W. Ritchie.
&160'--L4 J" '
BARBARA G. SILUS Notary Public
` NOTARY PUBLIC-MINNESOTA
My Commission Expires Jan. 31, 2008
Page 5 of 5
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56397
GRONBERG & ASSOCIATES, INC.
SURVEYING, ENGINEERING AND LAND PLANNING
445 N. WILLOW DRIVE
LONG LAKE, MINNESOTA 55356
YCL-4/3-4141
F.V . 952-473-4435
5639
THONIAS & KRISTEN RITCHIE
PERbJEABILITY ANALYSIS NEAR PROPOSEDGRASSPAVE DRIVEWAY AREA
JUNE 22, 2007
TEST HOLE NO. 1
TIME
MEAS.
DROP
PERC. RATE
10:50
5 5/8"
11:20
6 5/8"
1"
30 MPI
11:50
7 1/2"
7/8"
34.3 MPI
12:20
8 3/8"
7/8"
34.3 MPI
34.3 Min. per inch = 1.75 inches per hour
TEST HOLE NO. 2
TIME
MEAS.
DROP
PERC.RATE
10:51
6 3/8"
11:21
7"
5/8"
48 MPI
11:51
7 1/2"
1/2"
60.0 MPI
12:21
8"
1/2"
60.0 MPI
60Min. per inch = 1 inch per hour
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563a
RAIN GARDEN WORKSHEET 5 6 3 9
1) Slope:
Height of suing (in inches)
Distance between inches) a 100
1)
><
%
stakes (in
2) Rain garden depth:
2)
From Chart on page 5
y
in.
3) Home footprint:
3)
of house x width of house
><Length
sq. ft.
4) Number of downspouts:
4)
number of downspouts on home
><,Total
5) Roof area draining to garden?'(/4L inn pFq viaui
5)
(Line 3 _ Line 4) x number of downspouts Wt 6 'a
O G o
sq. ft.
directed to the rain garden
6) Lawn area (if more than 30 ft from downspout):
6)
Length of uphill lawn area x width of uphill lawn area
'72 o o
sq. ft.
7) Total drainage area:
7)
Line 5 +line 6
/o, Z o o
sq. ft.
8) Soil type:
8)
Enter sandy, silty or clayey from results on page 7
C /-1 y e y
9) Rain garden size factor:
9)
Results from table I or table 2 on page 8
10) Rain garden size:
10)
Line 7 X Line 9
1020
sq. ft.
Lines 2 and 10 give you the dimensions of your rain garden. This is based on capturing 100% of
the runoff. If you do not wish to build a rain garden of this size, a smaller rain garden will still help
control runoffand filter pollutants.
Rain Carden.Nanualfar Ham "nen IS
5639
4.6 Preparation:
(Ensure that sub -base materials are structurally adequate to receive designed base
course, wearing course, and designed loads. Ensure that grading and soil porosity of the
sub -base will provide adequate subsurface drainage.)
A. Place base course material over existing surface, in lifts not to exceed 150 mm (6"),
compacting each lift separately to 92% minimum -95% maximum Modified Proctor. Leave
1" to 1.25' for Grasspave2 unit and sand or sod for Final Grade.
B. Base course depths - 6" (minimum) deep; 3" of #57 stone, under a mixture of 1" of
washed #89 (3/8" max) and 2" of clean, compactable, well draining fill sand compacted
with a motorized plate tamper or a riding roller compactor to 92% Modified Proctor. Base
placed over existing surface. This creates an ideal surface for Grasspave2. Stone to
sand ratio should be between 65/35 and 75/25.
(continued from page 7)
provides for good drainage at the surface and makes the firelane or
parking area not only safer but more durable. Do a site inspection
when the base is installed to ensure the depths are accurate and
drainage is effective.
Base Course Design
Calculating the depth and composition of materials for the base
course incorporates the same design criteria as for other pavements:
• load bearing capacity of native (or fill) subsoil
• plasticity or impact of moisture on
strength and longevity
• frost heave potential
• traffic load, frequency andor duration.
Sample Base Course Depths
Please consult with a soils engineer
for site-specific base requirements.
Generally, the depth that is used under
asphalt will be the requirement under
Grasspave2. Golf carts and pedestrian
traffic may require nothing over sandy
gravel soils, and just 2" to 4" (5-10 cm)
over very weak soils. Cars usually need
4" to 8" (10.20 cm). Buses, trucks, and fire
trucks can easily require 8" to 12" (20.30
cm) or more. The use of geotextiles,
though not required, below the base will
prevent integration with subsoils and is
strongly advised in areas of clay or silt
soils and frost heave.
Filling Grasspave2 with Topsoil
Is Unwise
Remember that we are building a road-
way with grass as the surface. Maintaining porosity for air and
water movement is very important. When organic, clay or silt
particles are in the rings, compaction can take place within the
small cells, defeating the structure, and restricting access by air
and water to roots. Growing grass in sand over a sandy gravel
road base is more difficult to get established, but horticulturally
and structurally it works! If ruts should appear in a finished
installation, topsoil has been used either under the rings or within
the rings, contrary to our installation instructions.
5639
ensure that the root system is well established. Seeding allows
total customization of plant selection and eliminates possible con-
tamination of the root zone from clay based or high peat content
sod, both problems with high use areas.
92% Root Area and 100% Grass Coverage
Our installations are hard to find because they are invisible!
With so little plastic near the crown of the grass, the blades of
grass are not smashed by product. Root development is not inter-
rupted from spreading laterally. The rings are strong and rigid,
Dupont Center, Irvine, U —Fre department testing of
Grostpavez with sand -filled dogs to determine stability of
outriggers when ladderwar extended Below. rirelane
shown years later. Grass enhanced Me landscaping and
softened the appearance of this building.
Seeding Grasspave2 Is Popular
In California and other temperate climate zones many of our
installations are seeded. Waiting for a period of two mowings will
keeping grass root systems protected
from harm. The roots grow directly
downward and deeply into the sandy
gravel base course. Grasspave2 by
Invisible Structures is, by far, the best
possible "living" paving surface
designed by a landscape architect.
Grasspave2 Uniqueness
• Large rolls for fast installation — 10
to 125 m2
• 92% root area for best grass growth
• Strong rigid rings that conform to
undulating terrain with
flexible grid between rings
• 100% recycled post -consumer plastic
• Hydrogrow — polymer, fertilizer, soil
amendment provided free
• Rolls can be cut and shaped with
pruning shears
CSI Grants Specification Number
0179SParousftng — Recognition by CSI
has helped establish legitimacy to the
porous (grass and gravel) paving indus-
tries. Now we can all agree on 02795! As designers expand their
use and acceptance of porous paving, the industry will grow.
Creativity With Hard Surface Pavers
Ideas include: Combine Grasspave2 with flush paths, pads or mark-
ers of concrete in a firelane for pedestrian traffic, design elements
or delineation; use brick pathways through the grass; fill the rings
with other plant materials such as daisies and ground covers; lay
strips of concrete to define parking areas, especially handicapped
parking; checkerboards of grass and pavers or other patterns to
be enjoyed from high-rise offices; design of company logos in the
parking lots or frelanes with polymer -bound colored stone; narrow
residential streets with guest parking on grass shoulders.
50 CM (19.7•) SPECIFICATIONS 5 O g
16.7 CM (6.6") 25 CM (9.8") UNIT SIZE - 50 CM X 50 CM X 2.5 CM
(20" X 20" X 1 ")
AVAILABLE IN 9 STANDARD ROLL SIZES
8.3 CM (3.3")
2.3 CM (0.9")
604(2.4')
��� IIII ���� IIII ;;� IIII viii IIII=;; IIII �
UNIT WEIGHT - 510 GRAMS (18 OZ.)
OR 2.0 KG (4.5 POUNDS)
STRENGTH - 402 KG/CM x(5720 PSI)
COLOR - BLACK (STANDARD)
RESIN - HDPE (WITH SOME POST -CONSUMER
RECYCLED CONTENT)
ELM
GRASSPAVE2 SQUARES
ADJACENT GRASSPAVEZ SQUARES
SEE ENLARGEMENT BELOW
TDROGROW MDC BELOW RING
SUPPLIED FREE BY MANUFACTURER
- RINGS FILLED WITH CONCRETE SAND (CLEAN, SHARP SAND)
NOTE: GRASS/PLANT TYPES SHALL BE SPECIFIED BY A LANDSCAPE ARCHrrECT OR
LANDSCAPE DESIGNER.
COMPACTED SANDY GRAVEL ROAD BASE
95% MODIFIED PROCTOR DENSITY
6 INCHES TO 12 INCHES
(DEPTH OF BASE COURSE TO BE DETERMINED
7 BY ON-SITE ENGINEER)
COMPACTED SUBGRADE,
SECTION
TOP OF GRASS ROOT MASS 6 MM
(1 /4") ABOVE TOP OF RING
GRASSPAVEZ ATTACH WITH
SNAP -FIT FASTENERS
ROOT MASS TO FILL
GRASSPAVEZ
)IMPACTED SANDY GRAVEL Ce /YtJ f /fr-J)
BASE COURSE
TYPICAL GRASSPAVEZ DETAIL
CHOOSE THIS PRODUCE FOR RENFORGNG GRASS W EARNG SURFACES
" DT TO 9 1600 Jackson SL, Ste. 310
Invisible GOLDEN, COLORADO 80401
800.23}1510 OR 303-233-8383
Structures. Inc. FAX 800-Z33-1522 OR 303-233-8282
www..vmblcrz turea.cam
fvP0ET.0wG
rev. 10/05
r arc v u i i
from buckets mounted on tractors, which then exit the site by driving over rings already filled with J5 6 39
sand. The sand is then spread laterally from the pile using flat bottomed shovels and/or wide "asphalt
rakes" to fill the rings. A stiff bristled broom should be used for final "finishing" of the sand. The sand
must be "compacted" by using water from hose, irrigation heads, or rainfall, with the finish grade no less
than the top of rings and no more than 6 mm (0.25") above top of rings.
3.04 Installation of Grass
(Choose one paragraph below to meet grass installation method desired.)
0 (Preferred method) Hydroseeding/hydro-mulching - A combination of water, seed and fertilizer
are homogeneously mixed in a purpose-built, truck -mounted tank. The seed mixture is sprayed onto the
site at rates shown on plans and per hydroseeding manufacturer's recommendations. Coverage must be
uniform and complete. Following germination of the seed, areas lacking germination larger than 20 cm
x 20 cm (8" x 8") must be reseeded immediately. Seeded areas must be fertilized and kept moist during
development of the turf plants.
B. Install thin sod directly over sand filled rings, filled no higher than the top of the rings. Sod
strips should be placed with very tight joints. Sodded areas must be fertilized and kept moist during root
establishment (minimum of 3 weeks). Sodded areas must be protected from any traffic, other than
emergency vehicles, for a period of 3 to 4 weeks, or until the root system has penetrated and established
well below the Grasspave2 units.
C. Install grass seed at rates per grass type. A light "dusting" of commercial topsoil mix, not to
exceed 1/2" (25 mm) can be placed above the rings and seed mix to aid germination rates. Seeded areas
must be fertilized and kept moist during development of the turf plants.
3.05 Protection
(Choose one paragraph below to match grass installation method.)
A. Seeded areas must be protected from any traffic, other than emergency vehicles, for a period of 4
to 6 weeks, or until the grass is mature to handle traffic.
B. Sodded areas must be protected from any traffic, other than emergency vehicles, for a period of 3
to 4 weeks, or until the root system has penetrated below the Grasspave2 units.
3.06 Cleaning
A. Remove and replace segments of Gtasspave2 units where three or more adjacent rings are broken
or damaged, reinstalling as specified, so no evidence of replacement is apparent.
B. Perform cleaning during the installation of work and.upon completion of the work. Remove all
excess materials, debris, and equipment from site. Repair any damage to adjacent materials and surfaces
resulting from installation of this work.
EMD OF SECTION
If you have any questions regarding this specification, please call Invisible Structures, Inc. 1-800-233-
I510, overseas call 303-233-8383.
6/25/2007
i ar'c J V, ,
H. Grasspave2 Sign: A sign to identify the presence of Grasspave2 paving, stating that special
maintenance is required, with the Manufacturer's phone number, and made of durable materials for 5 6 3 9
outdoor exposure shall be provided and installed_
I. Firelane Signage & Delineation: Firelanes must be identified regarding their entrance and physical
location with the placement of signs, gates, curbs, bollards, etc. Specific signage wording and other
details must be coordinated with and approved by local fire authorities.
PART 3 - EXECUTION
3.01 Inspection
(It is recommended that Fire Department inspectors be scheduled to inspect installation of Grasspave2
during preparation of the subbase, installation of the base course, and installation of Grasspave2 units.
Most small projects can accommodate these inspections all on the same day. Verify with Fire
Department if certificates of inspection are required.)
A. Examine subgrade and base course installed conditions. Do not start Grasspave2 installation
until unsatisfactory conditions are corrected. Check for improperly compacted trenches, debris, and
improper gradients.
B. Installation constitutes acceptance of existing conditions and responsibility for satisfactory
performance. If existing conditions are found unsatisfactory, contact Project Manager for resolution.
3.02 Preparation
(Ensure that subbase materials are structurally adequate to receive designed base course, wearing course,
and designed loads. Generally, excavation into undisturbed normal strength soils will require no
additional modification. Fill soils and otherwise structurally weak soils may require modifications, such
as geotextiles, geogrids, and/or compaction (not to exceed 90%). Ensure that grading and soil porosity
of the subbase will provide adequate subsurface drainage.)
A. Place base course material over prepared subbase to grades shown on plans, in lifts not to exceed
150 mm (6"), compacting each lift separately to 95% Modified Proctor. Leave minimum 25 mm (I,,) to
35 mm (1.5") for Grasspave2 unit and sand/sod fill to Final Grade.
B. Spread all Hydrogrow mix provided (spreader rate= 4.53 kg per 100 m2 (10 lbs per 1076 ft2)
evenly over the surface of the base course with a hand-held, or wheeled, rotary spreader. The
Hydrogrow mix should be placed immediately before installing the Grasspave2 units to assure that the
polymer does not become wet and expanded when installing the units.
3.03 Installation of Grasspave2 Units
A. Install the Grasspave2 units by placing units with rings facing up, and using pegs and holes
provided to maintain proper spacing and interlock the units. Units can be easily shaped with pruning
shears or knife. Units placed on curves and slopes shall be anchored to the base course, using 16d
Common nails with fender washer, as required to secure units in place. Tops of rings shall be between 6
mm to 13 mm (0.25" to 0.5") below the surface of adjacent hard -surface pavements.
B. Install sand in rings as they are laid in sections by "backdumping" directly from a dump truck, or
6/25/2007
I ar,G T V1 ,
(Crushed shell and limerock alone can set up like concrete without sand added.) 56 3 Q
B. Hydrogrow Mix: A mixture made from several commercial products including: 1) cross-linked
polyacrylimide (<O.1%) polymer, which is non-toxic and neutral in pH, and will absorb 150 to 350 times
its weight in water from most tap sources; 2) ZeoPro zeolite mineral, amended with small amounts of
starter fertilizers, from Zeoponix, Inc.; 3) Isolite porous ceramic, designed to hold large amounts of
water without physical degradation or change of size of particle, from Sumitomo Group; 4) and
aggromolated Humate, a natural source of nutrients and micronutrients, from Tri -C Enterprises.
C. Grasspave2 Grass Paving Units: Lightweight injection -molded plastic units 0.5x0.50.025 m
(20"x20"xI" high, 2.7 ft2 each) with hollow rings rising from a strong open grid allowing maximum
grass root penetration and development. The plastic shall be 100% post -consumer recycled plastic
resins, predominately HDPE, with minimum 3% carbon black concentrate added for UV protection.
Loading capability is equal to 402 kg/cm2 (5700 psi) when filled with sand, over an appropriate
depth of roadbase. Standard color is black. Unit weight = 5I0 g (18 oz.), volume = 8% solid. Units
may also be shipped in pre -assembled into rolls that vary from 10 square meters (108 sf) to 125 square
meters (1345 sf).
D. Sand: Obtain clean sharp sand (washed concrete sand) to fill the 25 mm (one inch) high rings
and spaces between the rings when seeding or using 13 mm (half inch) thick sod (soil thickness).
E. Grass: Use species resistant to wear by traffic generally a Blue/Rye/Fescue mix used for athletic
fields in northern climates, and Zoysia, Fescue, or Bermuda types in southern climates.
(Check with local sod and seed suppliers for preferred mixtures.)
(Dedicated firelanes can use same grass species used on surrounding turf.)
(Parking applications require greatest wear -resistant species possible, generally available only by
seed or sprigging.)
(Choose one of the following paragraphs to suit project requirements.)
1. Sod: Use 13 mm (0.5") thick (soil thickness) rolled sod from a reputable local grower.
Species should be wear resistant, free from disease, and in excellent condition. Sod shall be grown in
sand or sandy loam soils only. Sod grown in soils of clay, silt, or high organic materials such as peat,
will not be accepted.
2. Seed: Use seed materials, of the preferred species for local environmental and projected
traffic conditions, from certified sources. Seed shall be provided in containers clearly labeled to show
seed name, lot number, net weight, % weed seed content, and guaranteed % of purity and germination.
Pure Live Seed types and amount shall be as shown on plans.
F. Mulch: (Needed only for seeding.) Shall be of wood or paper cellulose types of commercial
mulch materials often used in conjunction with hydroseeding operations. Mulches of straw, pine
needles, etc. will not be acceptable because of their low moisture holding capacity.
G. Fertilizer: A commercial "starter" fertilizer, with Guaranteed Analysis of 17-23-6, or as
recommended by local grass supplier, for rapid germination and root development.
6/25/2007
Page 3 of 7
shipped in flat sheets that measure 1 -meter (40") square.
2. Do not build on frozen work or wet, saturated or muddy subgrade. 56 39
E. Protect partially completed paving against damage from other construction traffic when work is
in progress, and until grass root system has matured (about 3 to 4 weeks). Any barricades constructed
must still be accessible by emergency and fire equipment during and after installation.
F. Protect adjacent work from damage during Grasspave2 installation.
PART2-PRODUCTS
2.01 Availability
A. Manufacturer: (Grasspave2, Hydrogrow) Invisible Structures, Inc., 1600 Jackson Street., Suite
310, Golden, Colorado 80401. Call from USA and Canada 800-233-1510 toll free, International 303-
233-838J, Fax 303-233-8282.
B. Local Sales Representative:
(Contact Manufacturer)
2.02 MateriaLs
A. Base Course: Sandy gravel material from local sources commonly used for road base
construction, passing the following sieve analysis.
% Passine Sieve Size
100 3/4"
85 3/8"
60 #4
30 #40
< 3 #200
1. Sources of the material can include either "pit run" or "crusher run." Crusher run material
will generally require sharp sand to be added to mixture (33% by volume) to ensure long term porosity.
If there is difficulty in finding local sources to meet this sieve analysis, and alternative mixture can be
created by mixing 2/3 crushed drainage rock (0.75" dia) with 1/3 concrete or river sand.
2. Selected materials should be nearly neutral in pH (range from 6.5 to 7.2) to provide adequate
root zone development for turf.
3. Alternative materials such as crushed shell, limerock, and/or crushed lava may be considered
for base course use, provided they are mixed with sharp sand (33%), and brought to proper compaction.
6/25/2007
B. Related Work:
1. Subgrade preparation under Section 02200 Earthwork. 56 39
2. Subsurface drainage materials - Section 02710 Subsurface Drainage, when needed
3. Irrigation installation -Section 02810 Irrigation, when needed.
1.03 Quality Assurance
A. Follow Section 01340 requirements.
B. Installation: Performed only by skilled workpeople with satisfactory record of performance on
landscaping or paving projects of comparable size and quality.
1.04 Submittals
A. Submit manufacturer's product data and installation instructions.
B. Submit a 10" x 10" section of Grasspave2 material for review. Reviewed and accepted samples
will be returned to the contractor.
C. Submit material certificates for base course and sand fill materials.
1.05 Delivery, Storage, and Handling
A. Protect Grasspave2 units from damage during delivery and store under tarp to protect from
sunlight, when time from delivery to installation exceeds one week. Keep Hydrogrow in a dark and dry
location.
1.06 Project Conditions
A. Review installation procedures and coordinate Grasspave2 work with other work affected.
Generally, Grasspave2 is installed at the same time as project grass installation, nearly the last site
construction activity.
B. All hard surface paving adjacent to Grasspave2 areas, including concrete walks and asphalt paving
must be completed prior to installation of Grasspave2.
C. Gradients for grass porous paving surfaces can vary from flat to 20%, depending upon vehicle types
to use the surface. Please note that firelanes, or other emergency vehicles, will generally require a
gradient that is less than 6%. If there are any questions regarding existing gradients on this project,
please contact the Project Designer, or Invisible Structures, Inc.
D. Cold weather:
1. Do not use frozen materials or materials mixed or coated with ice or frost. Be careful in
handling rolls of Grasspave2 in temperatures below 50 degrees F, as product connectors become stiff
and can separate, and the individual units will retain the roll curl until warmed to room temperature
(aided by placement in sun for 15 to 20 minutes). If cold weather is anticipated, Grasspave2 can be
6/25/2007
TECHNICAL SPECIFICATION - Grasspave2 with 92% Void Space and Hydrogrow
Mixture
CSI blaster Format 32 12 43 Flexible Porous Pavement
(1997 Section 02795 Porous Pavement)
PART I - GENERAL 6 9
1.01 General Provisions
A. The Conditions of the Contract and all Sections of Division 1 are hereby made a part of this
Section.
1.02 Description of Work
A. Work Included:
1. Provide and install sandy gravel roadbase as per Geotechnical Engineer's recommendations
and/or as shown on drawings, to provide adequate support for project design loads. See 2.02
Materials.
2. Provide Grasspave2 Paving System products including Grasspave2 units, Hydrogrow soil
polymer, and installation per the manufacturer's instructions furnished under this section.
3. Provide and install clean sharp sand to fill the Grasspave2 units, when needed.
4. Provide and install grass by using sod or hydroseeding.
RECEIVED
JUN 2 5 2,n0
CITY OF ORONO
6/25/2007
STATE OF MINNESOTA )
) ss
COUNTY OF HENNEPIN )
The undersigned, being duly qualified and appointed City Clerk of the City of
Orono, Minnesota, certifies that I compared the foregoing resolution adopted at the
meeting of the Orono City Council on July 9, 2007, with the original thereof on file in my
office, and the same is a correct transcription thereof.
WITNESS my hand officially as such City Clerk and the Corporate seal of the
City this 18`h day of July , 2007.
2�
City Clerk
,,(seal)
f
t
Doc No 4500718 05/28/2008 09:00 AM
Certified filed and or recorded on above date:
Office of the Registrar of Titles
Hennepin County, Minnesota
Michael H. Cunniff, Registrar of Titles
TranslD 406915
New cert Cert
1195426
1214423
Deputy 59
Fees
$1.50 AF
$10.50 STATEFEE
$54.00 TDOCFEE
$0.00 TSUR
$66.00 Total
A RESOLUTION GRANTING VARIANCES
TO MUNICIPAL ZONING CODE
SECTION 78-1288 AND A CONDITIONAL
USE PERMIT PURSUANT TO MUNICIPAL ZONING
CODE SECTION 78-1286
FILE NO. 07-3284