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Home My WebLink AboutRE: request for and council action/remove from sewer project � . � TO: Greg Gappa, Public Services Director FROM: Stephen Weckman, On-Site Systems Manager DATE: August 18, 1998 RE: Request for exclusion from municipal sewer project,Jorgen Viltift-1155 Heritage Lane As per your request, the City performed a review of your septic system to determine whether you are eligible to be exempted from connecting to the Municipal Sewer at this time. In order to be exempted from connection at this time, we needed to show that the septic system meets a three foot separation to the seasonal water table, the septic tanks have bottoms, and the system is of adequate size for the dwelling. Several soil borings were performed in vicinity of the drainfield to determine the depth to the seasonal water table. Due to gravelly soils and the fill soils near the drainfield, only two borings reached a depth of seven feet (three feet below the drainfield). One boring was located in fill soils and was not used to identify the depth to the seasonal water table. The remaining soil boring showed no evidence of a seasonal water table. Inspection of the septic system revealed that the system is of adequate size and the tanks are of suitable construction to remain in use. The tanks have bottoms and are therefore not considered to be cesspools. The septic system inventory information indicates that 600 square feet of drainfield area was installed in 1969. Also, a typical 1969 septic system installation would have twelve inches of rock under the distribution pipe. A five bedroom dwelling would then require 500 square feet of drainfield area to be of adequate size in the sandy soils. Based on this site inspection, your residence does meet the conditions necessary for exclusion from municipal sewer connection at this time. The septic system may or may not meet all current codes, but is compliant and of adequate size for its current usage. If the system becomes non-compliant due to surface discharge or future changes in the septic system regulations, the residence will be required to make connection to municipal sewer. Any changes in the size or usage of the residence that would require addition or alteration of the septic system must instead be connected to municipal sewer. ' ' SEPTIC SY.ST�1Vi INVENTORY j . Address: 1155 Heritage Ln. PID: 10-117-23 13 0012 Bwlding Type: residence #BRs/GPD: #Systems 1 Units Billed 1 Permit#: 2109 Date of Permit: 5/9/69 Installer: Widmer Bros. System Type standard trench Experimental: no Appliances SYSTEM CONDITION Conformity: 2 Tank Condition: 9-� ondition: 11 Failure Pot: medium � SEPTIC TANKS . Material: Capacity: , Setback�to-Bld - Cess ool: no ��l � � _g• _�_ P � DRAINFIELD � Length of Lines Lines: Trench Width: reatment Area: 600 �ype of Filter Soil Boring: yes ; T' . n er ile Perc Rate: �� Setback DF-Bldg: / DF Ht above Wt: '�� Soil Type: i Li.mitations: � % • WELL DATA_�__- Setbacks-Well-Tanks: WeJ1-DF: Report in File: y Pump Type: subm. Depth: 179 Diameter: 4 Method: drilled INSPECTION RECORD P UMPO UT RECORD DATE DESCRIPTION COMPLIANCE DATE GALLONS 10/31/78 compliance s 4/16/� 2000 6/18/84 no surfacing 2 10/3/20 1000 9/24/87 no surfacing-two sunken spots in DF 2 6/28� 1000 7/10/90 no surfacing 2 10/1/92 no surfac' b 2 6/8/94 no mot ing to�60",tren h bottom at 48" 2 • 4/14/98 no surfa 'ng-p p�' s � 2 � � . � \ , ' z / C C' �Y ,�l� , {� �� i � U .�� --'�.�) � �--� J � � �� L�� -� c� �� -�'r ��'��-�' � � � � � � �� rl"��-- �''�l� G�� ?. � ��-�, ,_ � �U� � C f� �� o, �� " �� l� � �/��,� fi�/1 � ��-�� r ��-�� . �1c� � 1 �� z Ln . � � � � �. ' _ � � � � C � r� . ��'� � � � ��s ; � 31� h , � _ _ ; �,� �< � � A � �� ; ��`-� � � � �, � � � �� ,�5- � � ��t � � � � � �� Ti .�r> -- ►31�� d`6 / �' �i (� ,� /� � _ - `�� T .�n I� � �� - � �� 3� � � d ��. . �r � -�. ' _ ' � �� '�� ` -< �6 �� 6 / .�� lJ l ��i �� ; � ,��- -�--3 i� � ,� , . ,�� G Li /�a -- — '\ .�� / � I , / —� �-- /U �`r�� ' L. ��'J �1� �J l � / i� - i �`�� r --, �j` l/ , . �' ,`� �/ �� _�� ' - — , - / �� " ; �� ,� �� y� ,� . , . , , � � _ ,� � � �� , �; �� -:-� ' , �� 1 � � � � , � �� l / - �� /�� ✓ �b` � �� _. G%,��;/ INDIV'iDU�I. SEWAGE TREATMENT SYSTEM WORKSHEET :-- � �.Ow D-7 A. Esrimated gpd (See D-7 or I-3,4,5)or ESTIMCT�D ScWAGc �Lo'NS IN GALLONS P� OAY ' measured gpd NUMBER TYPE OF RESIpENC'c° ' SEP'I'IC?ANK VOLUME BEDROOUS I � II L'"i.. � g, gallons(See C-3 or C-5) 2 30o z23 i eo sos 3 450 300 218 0� 4 6C0 3TS 256 �°�� SOILS (Site evaluation data) 5 75o a�o Zsa rY�:� C. Depth to restricting layer= � �-�-' feet 6 900 525 �z a. D. Maximum depth of system C-3 ft= f�t e i zo�o � 6� 4oe coi��s E. Percola on rate MPI F. SSF o�sq ft/gpd(See D-b,B-29) TR�CH BOTTOM AREA H. For trenches with 6 inches of rock below the pipe: C-3 A x F=�3 x�_=�,�sq ft of bottom area SEPTIC TANK CAPACITIES, IN GALLONS I. For trenches with 12 inches of rock�lo the pipe: uo��o��PA�m A x F x 0.8=�x�x 0,8 =�q ft of bottom area r+u�aeEa cF MiraMun� WfTH GAR04GE e�aoors uauio CaaACrrr otsaosa� j. For trenches with 18 inches of rock below the pipe: A x F x 0.66 = x x 0.66= sq ft of bottom area z oa�ess �so i i zs K. For trenches with 24 inches of rock below the pipe: ,oA. ,000 � ,sao AxFx0.6= x x0.6= sqftofbottomarea SOH6;' ,soa z2s BED BOTI�OM AREA �.e.OR 9 z000 00 � L. For seepage beds with 6 or 12 inches of rock below the pipe; 1.SxAxF= 1Sx x = sqftofbottomarea , ROCK VOLUME IN CU FT' M. Rock depth below distriburion pipe plus 05 foot times bottom area: tii =Rock depth+6 inches x Area (H,I,J,L,K) B-29 � +05 ft)x = cu ft 501� ��FOR�RSEWIGE TREA'McNT�D GAEAS - ROCK VOLUME IN CU YDS soi� a•aac�.aisrics soi� rrn�rMo+r u+ecs N. Volume in cu ft divided by 27 pEqmUiION RiTC y�i� SaVeRE R:'f GeLLOM �.A M+27=cu yds_+27= cu yds iwNUT6��EA �Mw T�� I �d`°" s«'pE`� ROCK WEIGHT ,.�„�o.�• �� v,,�o —� — O. Cubic yards times 1.4 = tons o.� ro s _su+o o.as i.a� QI TO ] fIME S�MO� Id7 0.60 N x 1.4= tOIlS -x 1.4= tOI15 °T° �� s°"°T�c"' �2T aT9 - is� jo �cau i.sr aso 7t TO a] SiLT LOu.� 200 0.70 DISTRIBUTION �6� co a.'r�n°" uo au SiawEFt n�w 5a� cur (Check one based on slope) °y��-_.-----�-^�.w��-�--- .^--- �L,..-.�..e...,..w.......�..�,��.,�. Bed Qess than 6%a slope) `��-^�-��^�-��--..^�-w.-�--^�-� Trenches Drop boxes(any slope) Distribution box(level to slighdy sloping) TRENCH LINGTH f•f•l•�•f•�'1'f'f.r.f.f.;. T ti.ti•ti ti ti•ti •. ti.ti•�•ti.�.•'.•'• 2 inch Co •t 1•l�l.f.J.j.r.f.r.r.f.l• VCt ft •. � ti.ti.ti.•..•..ti.ti.�••.•ti••.•� � P. Select trench width= �f'f:f:'��`'f'f�f�f�f�f�?�• P- , ;f:f.:,f.. .,r:f,f.f_;. Q. Divide bottom area by trench width: (H,I,J,or K)+ �'�•~•`-• `.`.~.•.•� f.r r•r r•r•r•�• lineal feet ��f�f=f~: f�;'r'1� 4 inch Pipe �• �•~f�f f:,.�t:1: + = lineal feet �'`'~'�' �'�'�'�' f,f,f.f. .f.f.l.l. ti•t••.••.•ti• ti•ti•ti•ti'�• LAWNAREA •f.f.f f�'�,;� : f•r�f�f•r• .��.f,f:f'f:•.f'f.l:f.f� �:�, feet �:�.ti.•..ti.ti.�..,.ti..,..,.ti.ti.•. R. Select trench spacing,center to center= • f�f�f•f•f•r•�•f•�•f•�'�' ti.�.ti•ti••.•�•ti•�••..•..�•ti•ti•� r•f•r•r•r.f.r r•f•r•r•.•.• b-24 inch S. Multiply trench spacing by lineal feet R x Q=sq ft of lawn area ;;�•�''•'�'�'�'�''•''•''•'~'"•'` 1•r•l�f•f•�•f`�•�•f•�'f' ti.t.t.�.`..�.ti.ti.ti•V•'..•�.•.•ti x _ � ft �.r•r•f•r•f•f•f•r•r.r•f•r•�Rock Below the i: t•�•�•�•�•y•�•'••�•�•�•'•'�•`� y •• :•: 1•:•f•f•:•:•�•l• •:•.•. ti:�,:�,.•.•'.••.••.••.••.�'.••. . .� f�f f ��f�f�f f f�� ti:ti:t.ti.�..•..•..ti.ti.•..•..•.•'.••. LAYOUT(Use other side) �f�f~f�r�'�f�f~'�f�'�f~f~�` �`- =� 1. Select an appropriate scale;one square= feet. � 2.Show pertinent property boundaries,right-of-way,easements. 3. Show location oE house,garage,driveway,and all other improvements, exisring or proposed 4. Show locadon and layout of sewage treatment system. 5. Show locarion of water supply well. 5. Dimension all set backs and se�aration distances. � . . . � � S � (� � �.� � }� Et L�bd�� xc1�L��e rr��, Y'n.o� � C� REQUEST FOR COUNCIL ACTION DATE: October 9, 1998 ITEM NO.: �� Department Approval: Administrator Reviewed: Agenda Section: Name Gregory A. Gappa � Public Services Title Director of Public Services % Item Description: Revised Assessment Roll Resolution for Shoreline/Heritage Sanitary Sewer Project - Resolution Construction is nearly complete on this project with sodding and paving of the final lift of bituminous pavement in 1999 left to be completed. Construction went very well for this project, with no unexpected problems, so the project costs are substantially lower than estimated. The original assessment roll,which was adopted at the June 29th assessment of$19,100 per unit. This was based on 20 properties being assessed for the project. There are two lots that were platted in the original subdivision that have been owned by an adjacent landowner outside the subdivision ever since the lots were platted. These were purchased to provide a buffer between the subdivision and the adjacent parcel. This subdivision was platted in the 1960's before the cunent zoning regulations were in effect, so all of the lots in the subdivision are non- conforming and are all approximately one acre in size. The original proposal was not to assess the two vacant non-conforming lots, so as to not imply any zoning or development rights for these lots. Also the property owner has no intention of selling or development these lots,at this time,and would have likely appealed the assessment. The assessment of these two vacant lots was questioned by one of the citizens at the assessment hearing. The Council indicated that based on the development of all of the other lots,the two vacant lots would most likely be considered buildable in the future. Development of these lots with septic would be difficult, but with sanitary sewer available, it would be feasible to develop these lots. The Council directed staff to review the ability of these parcels, and to include them in the project for the calculation of the per-unit assessments if staff found that they would most likely be considered buildable. Staff is recommending these lots be included in the calculation of the per-unit assessments. This w�ill lower the unit cost for all of the other properties in the project. The City will carry the costs for these lots until they are developed at which time the costs will be covered through a connection fee. Due to costs substantially lower than estimated, and based on the costs for project completion distributed over 22 parcels, versus the original 20 parcels, the per unit project assessment will be $15,500. The feasibility study assessment estimate was $19,100 per unit. / . Revised Project Assessment Shoreline/Heritage Sanitary Sewer October 9, 1998 Page 2 Revised Assessment Interest Rate An interest rate of 8%per year was included in the original assessment roll. We are recommending a revised interest rate of 6.25%. This is the same interest rate that was presented at the Orono Orchards project public hearing. The proposed plan is to sell bonds in 1999 to cover the costs for the 1999 constniction, Orono Orchards project and this project. The assessment interest rate for the 1997 projects, based on a 4.97% bond interest rate was 6.25% based on current trends, we are anticipating a stable bond market and similar interest rates for next year. Requests for Project Exclusion Three property owners have requested exclusion from the project. The assessment hearing notice indicated that property owners needed to request exclusion from the project at that time. Two written requests were received before the assessment hearing and were listed in the assessment hearing staff memo. One additional resident requested exclusion at the assessment hearing. Subsequent investigation of the septic system proved the existence of a conforming septic far this property. No additional requests for exclusion have been received. The three property owners requesting exclusion are listed below: Daniel and Barbara Hoffman 1135 Heritage Lane Jorgen and Lucille Viltoft 1155 Heritage Lane C E and K Rusch 1920 Shoreline Drive A connection fee will be charged for these properties when a sewer connection is requested. The estimated annual City costs for debt service for a$15,500 assessment at a 5%bond interest rate for five properties will be $7,300. This includes the two vacant lots and the three properties excluded from the project. Notices to the property owners describing the prepayment options available will be sent to the properties after adoption of the revised assessment roll. The assessment roll needs to be submitted to the County by December 1 st. COUNCIL ACTION REQUESTED: Approval of the attached resolution adopting the revised assessment roll for the Shoreline/Heritage Sanitary Sewer Project. J � . ♦ I / i /' � \ � I / ` Y / , /' -, ,/ �' � �. , /� .�� : ,�o I �' ' � �- � i � . � LO � � , �u-� �� -� ' Q ' � , � � �� v J � Ii � / , � � oP% / � l I I � I P�/ _ '� `� � � • � e-, �, .� � � ` (� G �� .�o/ �X� � � , ; .� � , ,/ ,� �-� '��'L �� , ,�,�� '\� / /" t��c � =,; I� � � '�F�� \ / � ,� ,°` i.� ,0 4 , � � � �� I � ir/1 �1S� \9��tiGF / I HERIYAGE DRIVE C-1 � \` / _- �` � 4;. I � - - f-- �- '-- - -- -' -_' ' - - ' ' Hy � �� }, i � � 1 � /� -�__�i � h � �� ; �. ��, p � � _�" � � � �� , , � / i j /,/" —- � i " o��, � � , /�� I / p��-�,� N / / s� S ------- FORCEMAIN 7� �'�, q ---- GRAVITY SEWER � � \ e / A � GRAViTY MANHOLE _� /, � `- � RESIDENTIAL ° '0° / ' \/ GRINDER STATION �`°'° '^ '"` I _ 7 , HERITAGE DRIVE � Bonest�oo o Rosene ORONO, MINNESOTA FIGURE 4 Anderlik & - � Associates SANITARY SEWER E�g;��,� & Architects 1391004.OWG 2/20/98 COMM. 139100