HomeMy WebLinkAbout9.c. Receive Feasibility Report/Order Plans & Spec's for Water Tower, East Side Water Study, City Project #302 CITY OF ROSEMOUNT
EXECUTIVE SUMMARY FOR ACTION
CITY COUNCIL MEETING DATE: May 18, 1999
AGENDA ITEM: Receive Feasibility Report/Order Plans & AGENDA SECTION:
Spec's for Water Tower-East Side Water Study, City Project Old Business
#302
PREPARED BY: Bud Osmundson AGENDA'�� � Q �
City Engineer/Public Works Director �
ATTACHMENTS: Resolution & Report APPROVED BY:
Attached is the East Side Water System Report prepared by Dick Foster from Bonestroo,
Rosene, Anderlik and Associates. The Report addresses how to provide the water volume
for firefighting capabilities to the industrial east side of Rosemount.
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 and Continental Nitrogen. The Utility Commission recommended that the project
move forward at its March 15, 1999 meeting. We also discussed this Study at a Council
workshop on April 14th. After discussions with the Design Engineer and reviewing water
demand from existing and future companies on the east side, Staff is recommending that
the 500,000 gallon reservoir be constructed under a separate contract from the remainder
of the improvements. We are proposing that we separate the East Side Water
Improvements into Project #302A, which will be the construction of the water storage
reservoir and, 302B, which will be the construction of watermain from the tower to
Conley Avenue and from Conley Avenue at 140th Street to Koch Refining. The second
phase as discussed in the Report would be done in the future as a separate project as the
demand for water increases.
The proposed schedule for the Project #302A will be as follows:
Receive Feasibility Report/Order Plans & Spec's May 18, 1999
Receive Plans & Spec's/Order Ad for Bid July 6, 1999
Receive Bids August 6, 1999
Award Contract August 17, 1999
Construct Tower Fall, Winter 1999-2000
Complete Construction July 1, 2000
Staff will review the project in more detail with you at the meeting. Staff recommends
that the action be taken as stated below.
RECOMMENDED ACTION: MOTION TO ADOPT A RESOLUTION RECEIVING THE FEASIBILITY
REPORT FOR THE EAST SIDE WATER SYSTEM IMPROVEMENTS AND ORDER PLANS AND
SPECIFICATIONS FOR THE EAST SIDE WATER TOWER, CtTY PROJECT #302A.
COUNCIL ACTION:
5
CITY OF ROSEMOUNT
DAKOTA COUNTY, MINNESOTA
RESOLUTION 1999 -
A RESOLUTION RECEIVING THE FEASIBILITY REPORT
FOR THE EAST SIDE WATER SYSTEM IMPROVEMENTS AND ORDER PLANS AND
SPECIFICATIONS FOR THE EAST SIDE WATER TOWER
CITY PROJECT #302A
WHEREAS, the City Council deemed it necessary and expedient that the City of Rosemount,
Minnesota, investigate the feasibility of certain improvements, to-wit: City Project #302,
East Side Water System Improvements, in the City as described in and in accordance with
the feasibility report prepared by the Bonestroo, Rosene, Anderlik and Associates; and
WHEREAS, the City Council has been advised by the City Engineer that said utility
improvements, City Project #302 is feasible, and should best be made as proposed, and the
City Engineer's report to this effect has heretofore been received by Council, and filed with
the City Clerk on May 18, 1999; and
NOW THEREFORE BE IT RESOLVED, the City Council of the City of Rosemount accepts the
feasibility report for City Project #302 and places it on file.
NOW THEREFORE IT BE FURTHER RESOLVED, by the City Council of the City of Rosemount
hereby orders the preparation of plans and specifications for the water storage facilities, City
Project #302A described in the aforementioned Report.
ADOPTED this 18 day of May, 1999
Cathy Busho, Mayor
ATTEST:
Susan M. Walsh, City Clerk
Motion by: Seconded by:
Voted in favor:
Voted against:
• Bonestroo,Rosene.Anderlik and Aszocfates,Inc.is an Alfirmative Action/Equa!Opportunity Employer
� � Bonestroo Principalr.Otto G.Bonestroo,P.E.•Joseph C.Andert;k,P.E•Marvin L.Sorvala,P.E.•
Richard E.Turner,P.E.•Glenn R.Cook,P.E.•Robert G.Sthunicht,P.E.• Jerry A.Bourdon,P.E.•
Rosene Robert W.Rosene,P.E.and Susan M.Eberlin,C.P.A..Senior Consuttants
QAssotiate Principa/s:Howard A.San(ord,P.E.•Keith A.Gordon.P.E.•Robert R.Pfe�ferle,P.E.•
Anderlik & Richard W.Foster,P.E.•David O.Loskota,P.E.•Robert C Russek,A.�.A.•Mark A.Hanson,P.E.•
Michael T.Rautmann,P.E.•Ted K.Field.P.E.•Kenneth P Mderzon.P.E.•Mark R.Rolfs.P.E.•
Associ�tes Sidney P.Williamson.P.E..LS.•RoOert F.Kotsmith•Aclnes M.Ring•Michael P.Rau.P.E.•
Allan Rick Schmidt,P.E.
Engineers &Architects Offices:St.Paul,Rochester,�Ilmar and St.Cloud.M�l•ytiiwaukee.W�
WeDsite:www.bonestroo.com
March 9, 1999
City of Rosemount '
P.O. Box 510
Rosemount,MN 55068-0�10
Attention: Mr.Bud Osmundson,P.E.
Re: Rural Water System Estension
Rosemount,MN.
File 424GEN
Dear Bud:
Attached is a sutnmary of our investigarion into potential options for e�ctension of the Rural Water
System to provide domestic�ater service to Koch Refinery and future truckin� fir�ns to be located at
140th St. and State Hi�hway�2.The truckin�firms are also to be proti-ided with fire protection flo�vs.
Two basic alternatives and variations thereof were considered. The first altemative consists of a
phased plan to extend the esistin;Rural Water System and addin� an elevated reservoir to providz
fire flows. The second alternati�•e consists of inte�atin�the Peterson ti�'ell into the Rurzl Water
System to provide fire flow�s.The second altemative does not require an elevated reservoir.
Please feel free to contact me at(651)604-4840 if you have any questions or comments.
Yours very truly,
BONESTROO,ROSE�TE,A:��ERLIK&ASSOCIATES,INC.
i��
�i ���
Richazd W. Foster,P.E.
RWF:tIh
Attachment
2335 West HiahwaY 36 ■ St. Paul, MN 55113 ■ 651-63G-4600 ■ Fax: 651-63G-1311
REPORT ON RURA.L WATER SYSTEM EXTENSION
CITY OF ROSEMOUNT, MINNESOTA
1VIA,RCH 1999
L BACKGROUND
The Rural Water System was constructed by the University of Minnesota in 19�a�er i pthis aretar for
the residents of the Eastem Service Area. This was necessary when the�'ound
became contaminated and residents could no longer use their wells.The current Rural Water System
consists of two 500 gpm wells and approximately 7 milservi e and does not,ha e adequate capa ty�
Water System was designed for domestic water supply
to provide fire flows.
Ultimate development of the Eastern Service Area is probably several decades in the future, and it
was intended that the Rural Water System would be utilized to provide inirial water service for
developing industries in the Eastem Service Are�ethst e�f�e r quired to pr�oviade��flows ater.
However,modifications to the current Rural Wa y
2. PROPOSED IlVIPROVEMENTS
2.1 Design Considerations
The Insurance Services Office (ISO) recommends that a system the size of Rosemount's be capable
of delivering a fire demand of 500 gallons per minute (gpm) to 3,500 gpm for varying durations
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 sprinkler systems. Residential areas
require a flow rate of 500 gpm to 1,000 gpm dependent upon the housin;spacing.
Fire flows of 3,500 gpm for 3 hours for commercial and industrial customers have been used in the
design of the Rosemount water system. Modifying the Rural Water Syst�m to Pe�liver this p agnitude
of fire flow does not appear feasible. Ho�vever, fire flows of up to 2,000 m a ear to be racticable
and should be adequate in the short term.
2.2 Alternatives
Two basic altematives were selected as the most practicable options for providing e�t�a adding an
fire flows. The first alternative consists of extending the existing Rural Water Syst
elevated reservoir to provide fire flows. There are a number of variations to this alternative.The
second altemative consists of integrating the Peterson well into the Rural Water System to provide
fire flows. The Peterson well would be used only to provide fire flows and the existing Rural Water
System wells RR-1 and RR-2 would continue to provide domestic water.
Both altematives have certain characteristics in common.Both�e Ci aof Rosemount has a n to the
Koch Refinery and to the location of the future trucking firm tY
comprehensive Water Supply and Distribution Plan andract cable. Generally,this 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 will elevated reservoirs,etc.All
alternarives include the cost to add a variable speed drive(VFD)to well RR-2.This will allow RR-2
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 altemative consists of modifications to the existing Rural Water System to allow it to
provide a 2,000 gpm fire flow for two hours.The Koch Refinery will be served by a 12-inch water
main extended from node 2040 (see Figure 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 e�cisting 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 pressure surge
effects. The estimated cost for Phase 1 is as follows:
Item uantitv Unit Price Total Cost
12 inch DIP 6,800 feet $60 PLF � $ 408,000
16 inch DIP 2,650 feet $75 PLF $ 198,000
Jacking 200 feet $150 PLF $ 30,000
Elevated Res. 250,000 gal. $2.00/gal $ 500,000
Land Costs Lump Sum - - 0 - $ 100,000
VFD for RR-2 1 each $35,000 ea. � 35.000
Total Estimated Cost $1,271,000
If the City opts to install only 12 inch water main,the altemative cost drops to $1,226,000.
Altemative 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 at this time is to be more consistent with the
Water Supply and Distribution Plan,which calls for a one million gallon reservoir at this location.
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 with the current water demand,it is unlikely it
would be operated completely full for the near term future• 'The esti.mated cost for this Alternative is
as follows:
Item uantitv Unit Price Total Cost
12 inch DIP 6,800 feet $60 PLF $ 408,000
16 inch DIP 2,650 feet $75 PLF $ 198,000
24 inch DIP 2,500 feet $90 PLF $ 225,000
Jacking 200 feet $150 PLF $ 30,000
Elevated Res. 500,000 gal. $1.75 /gal $ 875,000
Land Costs Lump Sum -0- $ 100,000
VFD for RR-2 1 each $35,000 ea. � 35.000
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.
Phase 2
As water demand increases, a larger trunk watermain from the rural�vells is required and should be
installed. Phase 2 of Alternative No.�1 includes augrnentin�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 flow 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 � 30.000
Total Estimated Cost $1,273,200
2.4 Altemative 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 flo�v without the need for
elevated reservoirs,however it will not be as reliable especially if pro��isions 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 alternative,the pump house will consist of a
"pole type"building, and will house the pump,motor,drive and controls,and the hydro-pneumatic
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 $110,000 $ 110,000
Emergency Generator 1 each $60,000 $ 60,000
VFD for RR-2 1 each $35,000 ea. $ 35.000
Total Estimated Cost $1,116,000
If the City opts to install only 12 inch water main,the altemative cost drops to$1,072,000.
2.5 Recommended Altemative
The lowest cost altemative is Altemative 2;conversion of the Peterson well into a fire well tied into
the Rural Water System. However,there are a number of disadvantages to this altemative.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�own that the use of the well will be on a
temporary basis.The pump,motor, and controls are salvageable but the pump house and some of
the 12 inch water main are not and will represent a loss to the City. Lastly,when the Peterson well
is abandoned,the City will have to pursue one of the other altematives anyway.
The phased approach of Altemative 1 is our recommended altemative. There are a number of
advantages to this alternative. It integrates fairly well into the Water Distribution Plan and does not
require the construction of any infrastnicture that will have to be abandoned as the Eastern 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 Pernuts/Approvals
Permits will be required from other agencies as follows:
Mi.nnesota 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�' 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 deternuned 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 rec�otal cos of$1,271,000 oP 646,000 depending on e
1 of that alternative is bemg considered at a
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 azeas and 8-inch watermai.n in residential areas. Storage facilities and oversizing
are considered City Core Costs and are paid with Water Access Charges (WAC)with building
pemuts 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 siunmarizes 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' S18/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' S18/ft. $11,700
34-02400-010-01 1320' S18/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
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