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HomeMy WebLinkAbout2.g. East Side Water Study CITY OF ROSEMOUNT EXECUTIVE SUMMARY FOR ACTION COMMITTEE OF THE WHOLE MEETING DATE: April 14, 1999 AGENDA ITEM: East Side Water Study AGENDA��„�.i1ft � � � PREPARED BY: Bud Osmundson City Engineer/Public Works Director ATTACHMENTS: East Side Water System Study APPROVED BY: ��'/� �S The purpose of this item is to update you on the proposed East Side Water project. Attached is the Utility Commission item regarding the East Side Water System Report. I will go over the report in more detail with you at the meeting, however you can peruse it at your leisure. At it's March 15th meeting the Utility Commission passed a unanimous motion to recommend that the City Council receive the East Side Water System Report and conduct a public hearing to consider the project. The main issue of the proposed project is the funding. The Water Core Fund can be utilized to pay for the project, but the relatively slow development in a General Industrial area such as the east side offers will provide a slow payback to the Water Core Fund. We will be discussing the entire project with Koch and perhaps initiating a surcharge on water use on this East Side System as an accelerated payment package. RECOMMENDED ACTION NOTES: 3 � CITY OF ROSEMOUNT EXECUTIVE SUMMARY FOR ACTION UTILITY COMMISSION MEETING DATE: March 15, 1999 AGENDA SECTION: AGENDA ITEM: East Side Water System Report � Old Business AGENDA NO. PREPARED BY: Bud Osmundson 4a. City Engineer/Public Works Director � ATTACHMENTS: East Side Water System Report APPROVED BY: Attached is the East Side Water System Report prepared by Dick Foster from Bonestroo and Associates. The report addresses how to P�ou'knowethe Ru ai �Water System'9hting capabilities to the east side of Rosemount. As y provides potable water to approximately 30 customers, but does not have the capabilities of providing fire fighting flows. The study reviews different alternatives to providing high flow rates to the east side. The preferred alternative is a phased plan where the existing rural wells are utilized, an elevated reservoir is constructed and piping is installed to provide water to the Koch Refinery. The estimated cost is dependent upon the size of the storage tower and ranges from approximately 1 .25 million to 1 .6 million dollars. The funding for the project would come from assessments to benefiting properties and the Core Fund. The Core Fund will be paid back when connection charges are collected with building permits. I will provide some more information on this at Monday nights meeting. The major issue on this project is the funding. The Pa��h ch is common n indu tr al ould take some time due to the relatively slow developmen areas such as the area surrounding Trunk Highway 52 and CSAH 42. However, due to environmental concerns in the area and the likelihood that more business will be coming to this area Staff would recommend that this project move forward. I can go into more detail at the meeting on Monday night. RECOMMENDED ACTION: MOTION TO RECOMMEND THAT THE CITY EAR NGI TO CEIVE THE EAST SIDE WATER SYSTEM REPORT AND CONDUCT A PUBLIC H CONSIDER THE PROJECT. COMMISSION ACTION: � � �— � / 1 , � Bonestroo.Rosene,Ande�lik and Associates,fnc.is an Atfi�mative Action/fqual Opportunity Emp�. � Bonestroo Principa/s:O[to G.Bonestroo.P.E.•Joseph C.AnGertik,P.E.•Marvin L Sorvala.P.E.• Richard E.Turner,P.E.•Glenn R.Cook,P.E.•Roberc C�Schunicht.P.E.•Jerry A.Bourdon,P.E.• Rosene Robert W.Rosene.P.E.and Susan M.Eberlin,C.P.A..Se�ior Consultantz vAssociace Principalr.Howard A.Sanford.P.E.•Keith A Gordon.P.E.•RoDert R.Pfetferle.P.E.• Anderlik & Richard W.Foster,P.E.•David O.Loskota,P.E.•RoDerc C.Russek.A.I.A.•Mark A.Hanson.P.E.• Michaet T.Rautmann.P.E.•Ted K.Field,P.E.•Kenneth P.Mderson.P.E•Mark R.Rolfs.P.E.• Associ�tes Sidney P.Williamson,P.E..L.S.•RoDert F.Kotsmith•Ac�nes M.Ring•Michael P.Rau.P.E.• Allan Rick Schmidt.P.E. Of/ices:St.Paul,Rochezter,Witlmar and St.Cloud,M�l•Milwaukee.Wl Engineers &Architects WeDsite:www.Donestroo.�om March 9, 1999 Ciry of Rosemount P.O. Box 510 Rosemount,MN 55068-0�10 Attention: Mr.Bud Osmundson,P.E. � . Re: Rural Water System E.�ctension Rosemount,MN. File 424GEN Deaz Bud: Attached is a summary of our investi�ation into potential options for eXtension of the Rural Water System to provide domestic�ater service to Koch Refinery and future truckin� firms to be located at 140th St. and State Hi�hway�?.The truckin�firms are also to be provided with fire protection flo�vs. Two basic alternatives and�-ariations thereof were considered. The first alternati�e consists of a phased plan to extend the esisring Rural Water System and addin? an elevated reservoir to provide fire flows. The second alternative consi d alt mat�etdoe noPrequire 1an elevat d reservoiWater System to provide fire flow-s. The secon Please feel free to contact me at(651)604-4840 if you have any questions or comments. Yours very truly, BONESTROO,ROSE�tE,A:ti�ERl-IK&ASSOCIATES,INC. -� � i�'�� Richard W. Foster,P.E. RWF:tIh Attachment 2335 West Highway 36 ■ St. Paul, MN 55113 ■ 651-63G-4G00 ■ Fax: 651-63G-1311 RE PORT ON RURAL WATER SYSTEM EXTENSION CITY OF ROSEMOUNT, MINNESOTA 1VIA.RCH 1999 1; BACKGROUND . structed b the University of Minnesota in 1988 to supply Water for The Rutal Water System was con Y When the�ound water in this area ts could no longer use their wells. The current Rural Water System the residents of the Eastern Se ene Area.This was necess ater main.The Kural became contaminated and res�d co n s i s t s o f t w o 5 0 0 g p m wells and approximately 7 mlles of 6 and 4 o s not have adequate capacity Water S stem was designed for domestic wa ter s u p p 1 y s e rv l c e a U d Y to provide fire flows. e, and it �Iea 1S Ulobably several decades in�e�ice for � � I ' � � ` I � I II i I � � I to better integrate into the future Rural Water System,whatever form it takes. The cost estimates are based on the use of DIP pipe for water mains.The use of PVC pipe is estimated to decrease the piping cost approximately 10%. All unit prices used in the cost estimates include 30% for engineering, legal, and administration costs. 2.3 Alternative 1 Phase 1 of this alternative consists of modifications to the existing Rural Wated by a 2 tinch ater� provide a 2,000 gpm fire flo�v for two hours.The Koch Refinery will be serv y main extended from node 2040(see Figure 1).The proposed truckin? firms will be served by a 16- inch main between nodes 2040 and 2048.A 250,000 gallon elevated reservoir located at node 2048 will provide storage for fire flows.The existing Rural Water System�vells and 6 inch water main along 145th St.E can provide sufficient flow to refill the reservoir in one day during the Maximum Day Demand(MDD)day after a fire event.There will be about a 50 psi pressure increase over static at the pump house when the pump operates.It may be necessary to provide customers along the west end of the 6 inch�vater main�vith pressure reducing valves to minimize pressllre SUTge effects. The estimated cost for Phase 1 is as follows: REPORT ON RURAL WATER SYSTEM EXTENSION CITY OF ROSEMOUNT, MINNESOTA 1VIARCH 1999 1, BACKGROUND ural Water System was constructed by the University of Minnesota in 1988 to supply water for The R the residents of the Eastem Service Area.This was neSe�azY Wells. The�curren Rural W er System became contaminated and residents could no longer u consists of two 500 gpm wells and approximately 7 miles of 6 �d does not,have adequat�pa�al Water System was designed for domestic water supply service and to provide fire flows. Ultimate development of the Eastem Service Area is probably sev�aa1e��i w ter servt ce�ford it was intended that the Rural Water System would be utihzed to pro o�d water. developing industries in the Eastem Service Are e�st��f�e required to pr�oviad fi flows. However,modifications to the current Rural Wat y 2. PROPOSED IlVIPR�VEI�NTS 2.1 Design Considerations The Insurance Services Office (ISO) recommends that a system the size of Rosemount'n b a�a aons of delivering a fire demand of 500 gallons per minute (gpm) to 3,500 gpm for varyi S depending on the rate of demand. Recent experience with many commercial and industrial users has shown that 2,000 gpm is usually a sufficient flow rate to operate�pu�a Ssactireig S• Residential areas require a flow rate of 500 gpm to 1,000 gpm dependent upon th � P Fire flows of 3,500 gpm for 3 hours for commercial and indust ater S ste�mrto deli ver this malgnitude design of the Rosemount�feas'ble.Howevefr,nfi e flows of p to 2,000�pm appear to be practicable of fire flow does not appe and should be adequate in the short term. 2.2 Alternatives Two bas ic alternatives were selected as the most practicable options for providin8 water service and fire flows. The first alternative consists of extending the exis Sana ao�oe�s alt mative.dThe � elevated reservoir to provide fire flows.There are a number second alternative consists of integrating the Peterson well into�o sr�d theeex sting Rural Water fire flows. The Peterson well Woou d cont'mue oyp ovide dome tic water. System wells RR-1 and RR 2 B oth altematives have certain characteristics in common.Both requiri a of Rosemount has a n to the Koch Refinery and to the locatiod Distribution Plan and as s��the al manves proposed in this comprehensive Water Supply an racticable. Generally,t1us means that new report will attempt to be as consistent with the Plan as p water mains will be sized and located similar to the Plan,as D1�l�e�i d���S'�11 allow RR-2 altematives include the cost to add a variable speed dnve(VF ) to better integrate into the future Rural Water System,whatever form it takes. The cost estimates are based on the use of DIP pipe for water mains.The use of PVC pipe is est�clude�30%rfore the piping cost approximately 10%. All unit prices used in the cost eshmates engineering,legal, and administration costs. 2.3 Altemative 1 Phase 1 of this alternative consists of modifications to the existing R�e wrvted by a 2 tinch water� provide a 2,000 gpm f i re flow for t w o h o u r s.T h e K o c h R e fi n e ry w i l l Y main extended from no de 2040 (see Fi g u re 1).The proposed trucking firms will be served by a 16- inch main between nodes 2040 and 2048.A 250,000 gallon elevated reservoir located at node 2048 will provide storage for fire flows.The existing Rural Water System�vells and 6 inch�waM�imum along 145`h St.E can provide sufficient II W�e efiwill be about a 0 psipres ure increase over Day Demand(MDD)day after a fire ev static at the pump house when the pump operates.It may be necessary to provide customers along the west end of the 6 inch�vater main with pressure reducing valves to minimize pressure surge effects. The estimated cost for Phase 1 is as follows: Item uantitv Uni=e Total Cost 6,800 feet $60 PLF � $ 408,000 12 inch DIP $75 pLF $ 198,000 16 inch DIP 2,650 feet $ 30,000 Jacking 200 feet $150 PLF 250,000 gal. $2.00/gal $ 500,000 Elevated Res. _ � _ $ 100,000 Land Costs L�p S� � 35.000 VFD for RR-2 1 each $35,000 ea. �- Total Estimated Cost $1,271,000 If the City opts to install only 12 inch water main,the alternative cost drops to $1,226,000. Alternative 1 to Phase 1 is identical to above except that the reservoir capacity is 500, 000 gallons. The primary reason for increasing the reservoir size atone million t alon reservo rlat thi loc on. Water Supply and Distribution Plan,wluch calls for a g This is theoretically large enough to provide a 3,000 gpm fire flow for almost 3 hours.However, due to the low turnover rate of such a large reservoir wit eth�u�'��a ed c o foar this A1te�rnat velis would be operated completely full for the near term futur as follows: Item uantitv Unit Price Total Cost 12 inch DIP 6,800 feet $60 PLF $ 408,000 2,650 feet $75 PLF $ 198,000 16 inch DIP $90 PLF $ 225,000 24 inch DIP 2,500 feet $ 30,000 Jacking 200 feet $150 PLF 500,000 al. $1.75 / gal $ 875,000 Elevated Res. g _0_ $ 100,000 Land Costs L�P S� 35.000 VFD for RR-2 1 each $3 5,0 0 0 ea. � Total Estimated Cost $1,646,000 If the City opts to install only 12 inch water main,the altemative cost drops to $1,601,000. h�e2 As water demand increases, a larger trunk watermain from the rural wells is required and should be installed. Phase 2 of Alternative No.�1 includes augnenting the existin;6-inch water main with a 12-inch water main from the Rural Water System wells to the proposed elevated reservoir at node 2048 along CSAH 42 (see Figure 2). This will increase the pumpin;capacity somewhat and will virtually eliminate any pressure surge when the well pump is running.Most importantly,this will provide the residents and businesses along 145`�street with adequate fire flo�v capacity.The estimated cost for Phase 2 is as follows: Item uanti Unit Price Total Cost 12 inch DIP 20,720 feet $60 PLF $1,243,200 Jacking 200 feet $150 PLF S 30.000 Total Estimated Cost �1,273,200 2.4 Alternative 2 This alternative involves converting the Peterson well into a municipal fire well connected to the Rural Water System. This will require a new pump house,as well as a 12 inch water main to connect to node 2040 and to the Koch Refinery(see Figure 3). A 16-inch water main between nodes 2040 and 2046 will serve the proposed trucking firm. T'he Peterson well should be able to deliver 700 to 1,000 gpm. This alternative will furnish a respectable fire flow without the need for elevated reservoirs,however it will not be as reliable especially if provisions for emergency power are not available. Additionally, since there is the potential for operational problems such as pressure surges, a hydro-pneumatic tank of about 7000 gallons capacity will be provided.The tank, along with suitable controls and an adjustable frequency drive for the pump motor,will help to minimize such problems. Due to the temporary nature of this altemative,the pump house will consist of a "pole type"building, and will house the pump,motor,drive and controls,and the hydrapneumatic tank. It is assumed that the existing pump can be salvaged but will require a new inverter duty motor. The estimated cost for Alternative 2 is as follows: Item Amount Cost Total Cost 12 inch DIP 11,300 feet $60 PLF $ 678,000 16 inch DIP 2,500 feet $75 PLF $ 187,000 Jacking(12") 160 feet $100 PLF � 16,000 Jacking(16") 200 feet $150 PLF $ 30,000 Pump House 1 each $11��o� $ 160,000 Emergency Generator 1 each $60� 35 000 VFD for RR-2 1 each $35,000 ea. �y— Total Estimated Cost $1,116,000 If the City opts to install only 12 inch water main,the alternative cost drops to$1,072,000. 2.5 Recommended Alternative The lowest cost alternative is Altemative 2; conversion of the Peterson�vell into a fire well tied into the Rural Water System.However,there are a number of disadvanta�es to this alternative.First, this altemative does not readily integrate into the Water Distribution Plan.Additionally,the City will not own the well and property, and it is already l�own that the use of the well will be on a temporary basis. The pump,motor, and controls aze salvageable but the pump house and some of the 12 inch water main are not and will represent a los�e alternati e�s tanY�'vaYn the Peterson well is abandoned,the City will have to pursue one of the o The phased approach of Alternative 1 is our recomml�o thetWater Distribution Plan arid does not advantages to this altemative.It integrates fairly require the construction of any infrastructure that will have to be abandoned as the Eastem Service Area is developed. In Phase 1 only the installation of a VFD for Rural Well No. 2 is required as a modification to the existing Rural Water System wells,pumps, and water distribution system with the possible exception of individual pressure reducing valves for residents on the west end of the Rural Water System.In addition, a gravity system with an elevated reservoir will always be more reliable than a system dependent on electricity and a motor. Increasing the size of the elevated reservoir under Alternate 1 to 500,000 gallons has the advantage that it integrates better into the Water Distribution Plan. However, it has greater capital costs and will not offer significant advantages until sometime in the future. If the water demand(more customers)increases prior to approval of plans and specifications, the larger reservoir could be constructed. 2.6 Permits/Approvals Pemuts will be required from other agencies as follows: Minnesota Department of Health Watermain Extensions Minnesota Department of Health Storage Construction Minnesota Department of Health Well Improvements MnDOT Work in R.O.W. (TH52) Dakota County Highway Department Work in R.O.W. (CSAH42) 2.7 Right of Way/Easements All of the watermain construction is proposed in existing or to be platted rights of way on CSAH 42,US TH 52,Clark Road(Koch Frontage Road), 140`h St. east, and Conley Avenue. The City will have to acquire a 2 to 3 acre parcel for the proposed storage reservoir. The location should be as determined in the City's water supply and distribution plan and will have to be verified for elevation prior to final purchase. 3. FINANCING 3.1 Cost Estimate As previously stated,Altemative 1 is the recommended plan. For the purposes of this report,Phase 1 of that alternative is being considered at a total cost of$1,271,000 or$1,646,000 depending on the size of the storage reservoir. 3.2 Funding The City's policy for assessments is to assess the cost of a 12-inch watermain in commercial or industrial zoning areas and 8-inch watermain in residential areas. Storage facilities and oversizing are considered City Core Costs and are paid with Water Access Charges(WAC)with building permits and/or surcharges on water use,which are put into the City's Water Core Fund. Therefore, for the purposes of this report, the Water Core Fund would pick up the costs that are not assessed. Table 1 summarizes the assessments for the project. The fundin� for the project then is as follows: 250,000 Gal 500,000 Gal Reservoir Reservoir Total Cost $1,271,000 $1,646,000 Funding: Assessments $ 260,460 $ 260,460 Water Core Fund �1.010.540 1 385 540 Total $1,271,000 $1,646,000 The City is pursuing other funding sources such as the Minnesota Department of Trade and Economic Development and Drinking Water Revolving Loan of the Minnesota Department of Health. If those efforts are successful,the monies would be put into the Water Core Fund. Table 1 — Assessments PID No. LF Rate Assessment 34-01900-011-12 600' $18 /ft. $10,800 (actually in Sec. 18) 34-01900-011-12 1320' $18/ft. $23,760 34-01900-010-36 30' $18/ft. $540 34-01900-010-40 1290' $18/ft. $23,220 34-01900-010-67 1320' $18/ft. $23,760 34-01900-010-50 330' $18/ft. $5,940 34-01900-010-57 950' $18/ft. $17,100. 34-01300-010-17 650' $18 /ft. $11,700 34-02400-010-01 1320' $18 /ft. $23,760 34-02400-010-13 1020' $18 /ft. $18,360 34-02400-010-17 300' $18/ft. $5,400 34-02400-010-80 1320' $18 /ft. $23,760 34-02400-010-88 340' $18/ft. $6,120 34-02400-015-85 950' $18/ft. $17,100 34-03000-010-30 1320' $18/ft. $23,760 34-03000-010-50 1320' $18/ft. $23,760 34-03000-013-35 90' $18 /ft. �20 Total Assessments $260,460 O �0 °D O d � oyy mc �o . cm'oOq O O C b + /�tl A213W3 m ct a a �a� � ��h � $ � • Z $ � S� , . � w W � � � c� _ � a < y y %�^S = I=- t'�°a . o � � � m e �� ��� w m O � 6 .N- G � e O � I O ZS MH 'S' a � 3/�tl � �.+ � r � N O I �� �a'°`� 8Y ` �� d� � _ � � ° �■p V I O I I [L HtlS� I 3/�d 3NId�S � � W I � � � z N o I � If) U I �3 W ~ I �'3 �o W �� � . 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