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
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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
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