HomeMy WebLinkAbout8.c. Accept Water Supply and Distribution Plan & Conservation and Emergency Management Plan >
� CITY OF ROSEMOUNT
EXECUTIVE SUMMARY FOR ACTION
CITY COUNCIL MEETING DATE: November 4, 1997
AGENDA ITEM: Accept Water Supply & Distribution Pfan AGENDA SECTION:
& Conservation and Emergency Management Plan New Business
PREPARED BY: Bud Osmundson AGENDA ���
City Engineer/Public Works Director # � �j
ATTACHMENTS: Letter & Executive Summary from Plan; APPROVED BY: -l�
Met Council and DNR Letters Resolution
This item is on the agenda for Council consideration of the adoption of the City's
Conservation and Emergency Management Plan and the Water Supply and Distribution
Plan. These Plans were prepared for the City during the years of 1996 and 1997 and
finally have been accepted by the DNR and Met CounciL
The Conservation and Emergency Management Plan was a mandate report required by
the State to assure that each City in the State had water conservation measures in place
and was prepared for emergencies. This report also outlines the priority system which
should be used in the use of water in an emergency situation.
The Water Supply and Distribution Plan is a more technical plan which investigates the
existing water system and forecasts where future trunk facilities are needed. The City's
previous Comprehensive Water Plan was prepared in 1987 and covered the western 1/3
of the City. This Plan can be used as a guide for the acquisition of sites for water
towers, wells and to correctly locate trunk watermain for the entire City.
Staff will provide an overview of these Plans at the meeting. The recommended action is
to accept these Plans with the attached resolution.
RECOMMENDED ACTION: MOTION TO ADOPT A RESOLUTION ACCEPTING THE WATER
SUPPLY & DISTRIBUTION PLAN AND THE CONSERVATION AND EMERGENCY
MANAGEMENT PLAN.
COUNCIL ACTION:
8
._ .
._ .. _ _ _ _.
.
CITY OF ROSEMOUNT
DAKOTA COUNTY, MfNNESOTA
RESOLUTION 1997 -
A RESOLUTION ACCEPTING THE °WATER SUPPLY &
DISTRIBUTION PLAN" AND THE "CONSERVATION AND
EMERGENCY MANAGEMENT PLAN"
WHEREAS, the City of Rosemount is concerned with the safety and management of its
potable water system, and
WHEREAS, the City is concerned about the conservation of its potable water supply, and
WHEREAS, the City is concerned about the large capital costs for water supply and '
distribution system infrastructure and about guiding future development of the City, and ,
WHEREAS, the City initiated and completed two separate studies to address the I
conservation of its potable water supply, to provide a guide for emergency management,
and to investigate the Citys existing water supply and distribution system and to forecast
future water supply and distribution needs.
NOW THEREFORE BE IT RESOLVED, by the City Council of the City of Rosemount the City
hereby accepts the "Water Supply & Distribution Plan" and the "Conservation and Emergency
Management Plan" which will address these co�cerns.
ADOPTED this 4th day of November, 1997.
Cathy Busho, Mayor
ATTEST:
Susan M. Walsh, City Clerk
Motion by: Second by:
Voted in favor:
Voted against:
__ _.
,
y�P��of���9 Minnesota Department of Natural Resources
m w
� oJ 5(�Lafayette Road
Q,��' St.Paul,Ytinne,uta SS I55--1p_
�NATURP�
March 31, 1997
Bud Osmundson
City of Rosemount
287'S-145th Street West
P.O. Box 510
Rosemount, MN 5�068-0510
Dear Mr. Osmundson:
WATER EMERGENCY AND CONSERVATION PLAN APPROVAL
The Department of Natural Resources(DNR}received the Rosemount Conservation and Emer�ency
Management Plan that was prepared in compliance with Minnesota Statutes 103G.291. T'his plan is
one of 317 water emer�ency and conservation plans that must be reviewed and approved bv DNR.
Due to the limited num�er of DNR staff available to complete this enormous task,the DNI�is
pursuing several alternatives to improve response time for review and approval of plans.
In the Twin Cities Metropolitan Area(TCMA)there aze 109 plans that are being reviewed by 'I
both DNR and the Metropolrtan Council.To reduce duplication of effort,the DNR and
Metropolitan Council have agreed to use the Metropolitan Council's comments as the technical
input for plan approvals in the TCMA. This will allow DNR to devote more time on plans for
communrties in greater Minnesota and hopefully lead to better regional coordination of water
emergency procedures and conservation practices in the TCMA.
The Metropolitan Council has completed its review of the Rosemount Conservation and
Emergency Management Plan therefore,the plan is hereby approved by the DNR. Water
emergency and conservation plans are required to be updated every ten years,but should be
reviewed each year to address rtems mcluded in the implementation schedule and to assess the +
effectiveness of conservation efforts.
Improving water use efficiencies may be a lower cost altemative compared to constructing new
wells or additions to water and wastewater treatment facilities. Please be aware that demand
reduction measures must be implemented(M.S.103G.291)before requesting approvals for new
wells or increases in authorized water volumes. Approval of your water emergency and
conservation plan will not satisfy this re quirement unless demand reduction measures are
acra�,lly beizg imple;r,:r.te�. Le::,a:�d redt�c:icn measures rr�ust;.-��icd�a public educati��x
program, an evaluation of your rate structure and its impact on conservation, and may include
retrofitting or other programs. If you are planning to construct a new well,please contact the
DNR for approval of demand reduction measures.
Thank you for your cooperation and water supply planning efforts to�romote the wise use of
water. Please contact Travis Germundson at 296-0�12 or Jim Japs at..97-2835 if you have
questions about your plan or conservation programs.
Sincerely,
DiVISION OF WATERS
� �� ` ,�=.
�
Jo Linc Stine, Administrator
Permits and Land Use Section
ec: Area Hydrologist Metropolitan Council permit file #76-6069
DNR tnii�miation:hl2-'_9h-AIS7. 1-K(1O-7fi6-6UOU • TTY:61?-_'�1h-.5�iK-l. 1-x00-6�7-3�)'9
� :ln I'.yu:il Op���,rwnuy Fmpi��ycr . A Pnn�cd�m Rrr��lcd 1'.�prr<��mt:unmE a . � � . �.
� � Wh��Valuc.Uivcr.i�v � �� \luumum ul I�Y; Pu.4('��o.um�•r Wa.ic .
__,
Metropolitan Council � �
Working for the Region, Planning for the Future
� Environmentat Seruices
August 11, 1997
Bud Osmundson
Public Works Director
City of Rosemount •
2875 - 145th Street West
Rosemount, MN 55068-0510
RE: Rosemount Water Supply Plan Amendment
Metropolitan Council District 16
Referral File No. 16449-5
Dear Mr. Osmundson:
The proposed amendment involving an updated analysis of the city's water distribution system was
received for Council review August 1, 1997. The request updates the city's water supply plan, which
was finalized by the Council in 1996.
We have determined that the proposed amendment provides additional information on the city's water
distribution system and needs,and does not represent a significant departure from the city's existing
water suPPiY Plan. . _ . _
Because the proposed amendment appears unlikely to affect policies and plans in the city's adopted
water supply plan, the Council will waive further review. The amendment, explanatory materials
supplied and the information submission will be appended to the city's plan in the Council files.
If you have any questions regarding the review of this amendment, please contact Marcia Honold,
principal reviewer, at 602-1066.
Sincerzly,
�,�� �
Helen A. Boyer
Director, Environmental Services Division
HB:mh
cc: Jim Japs, DNR-Division of Waters
Mazk Wallis, Bonestroo, Rosene, Anderlik&Associates
Tenence Flower, Metropolitan Council District 16
Keith Buttleman, MCES, EPE Department Director
Cazl Schenk, Office of Locat Assistance
230 East Fifth Street St. Paul. Minnesota 55101-1633 (612)222-8423 Fax 229-2183 TDD/1'!Y 229-3760
M E9uot Opportuntty EmPloyer
Bonestroo,Rosene,AnOerlik and Associates,Inc.is an Aftirma[ive Action/fqual Oppor[unify£mployer
Bonestroo Pi����pa�s:Otto G.Bonestroo,P.E •Joseph C Anderlik,P.E •Marvin L.Sorvala.P.E.•
Rkhard E.Turner,PE.•Glenn R.Cook,P.E.•Robert G.Schunich[,P.E.• Jerry A.Bourdon.�P.E.•
RoseneRobert W.Rosene,P.E.and Susan M Eberlin,C.FA..Senior ConsWtants
� Associate Principals:Howard A.SanforC.P.E.�Keith A.Gordon.P.E.•Robert R.Pfe/ferle.P.E.•
- Anderlik & Ri�hard W.Foster,PE.•Oavid O Loskota.P.E •Robert C.Russek,A.I.A.•Mark A.Hanson,P.E.•
Michael L Rautmann,P.E.•Ted K.Field.P.E.•Renneth P.Anderson.PE.•Mark R.Rolts.P.E.•
Associates Sidney P.Williamson,P.E..L.S.•Robert F.Kotsmith
Offices:SL Paul,Rochesrer.Wilimar and St.C�oud.MN�•Milwaukee,WI
Engineers & Architects
February 10, 1997
Honorable Mayor and City Council
City of Rosemount
P.O. Box 510
Rosemount, Minnesota 55068-0510
Re: Water Supply and Distribution Plan
Our Fil�No.42410
Dear Mayor and CounciL•
Transmitted herewith is the Water Supply and Distribution Plan for the City of Rosemount. This
plan is intended to serve as a guide for the expansion of the City's trunk water system. This plan
should be submitted to the Metropolitan Council as an amendment to your Local Comprehensive
; Plan, as required by Chapter 186 of the 1993 legislative session laws.
This report recommends a combination of sugply, treatment, storage, and distribution system
improvements that will adequately serve the City at full development. A Capital Improvement Plan
has been prepared to help you plan for both long-term and short-term needs. A layout of the ultimate
trunk water supply and distribution system is presented on Figure 8. Preliminary cost estimates for
water mains, wells, treatment, and storage facilities have been prepazed to serve as the basis for
setting water connection charges.
We would be gleased to discuss the contents of this report and findings of our study with +,.11e City
Council, Staff and any other interested parties at any mutually convenient dme. i
Respectfully submitted, �
BONESTROO, ROSENE, ANDERLIK&ASSOCIATES,INC.
�;.�1 .� ,����.�-�--- ��,��. w '
�,�
Kazen A. Cavett Mazk D.Wa11is,P.E.
��....�
2335 West Highway 36 ■ St. Paui, MN 55113 � 612-G36-4600 ■ Fax: G12-b36-1311
Executive Summary
Introduction
This report represents a Comprehensive Water Supply and Distribution Plan for a water system that
will meet both the near-term and ultimate needs of the City of Rosemount. The western service area
(main water system) was last analyzed in 1988 and the eastern service area in 1993. This
Comprehensive Water Supply and Distribution Pian will update both studies.
Growth and Water Demand
Rosemount has experienced steady, ra.pid growth over the last 30 years, going from a 1960
population of 2,020 ta a 1995 population of 11,710. Water needs will continue to increase as the
City builds to an estimated 2016 population of 32,370. The estimated saturation population of the
study area is 53,240.
Water use has increased steadily as population has grown. In 1995 Rosemount purnped an average ,
of 1.05 million gallons per day(MGD). Over the past 10 years,the malcimum da.y occurred in 1995 '
with 2.91 million gallons being pumped on one day.The projected water demand for 2006 is a daily
average of 2.12 MGD with an estimated daily maximum of 6.01 MGD. The projected water demand
for 2016 is a daily average of 3.37 MGD with an estimated daily maximum of 8.89 MGD. Projected
water demands were based on the City's land use plan.
The projected future water demands assume that the existing industry"Koch", who accounts for a
large amount of the industrial land use will continue using private wells for water supply and not be
serviced by the Ciry of Rosemount in the future. The University of Minnesota also owns a lazge azea
of land in Rosemount. There is some groundwater contamination in this area owned by the
University. Therefore, it has been assumed for this plan that this area will eventually be serviced
with water from the City of Rosemount. If any of these assumptions chai�ge the projected demands
will need to be adjusted accordingly.
�
Water Supply &Distribution Plan �
. . . . .
Existing Facilit�es
The existing water supply and distribution system has served Rosemount's needs quite welL
Previous studies have provided cost-effective and timely improvements for the system. Due to the
majority of the development in Rosemount occurring in two sepazate locations,the City is currently
served by two(2)separate water systems. The Western(main)water system and the Eastern(rural)
water system.
Because the ground elevation of the City gendy drops in elevation from west to east, the proposed
water plan divides the City into two systems operating at two separate pressures. The high water
level for the Western Service Area is 1105 ft and for the Eastern Service Area is 1050 ft.
The Western Service Area presently obtains its raw water supply from 4 wells,supplying a total fum
capacity of 2,600 gpm(3.7 MGD). A fifth well,Well No. 6, was only used in emergency situations
due to high iron and manganese and mechanical problems. It was abandoned in 1997. The Eastern
Service System obtains its raw water supply from 2 wells,which supply a total firm capacity of 500
gpm(0.72 MGD).
Fluoride and chlorine are added to prevent tooth decay and to provide disinfection.Polymers aze also
added to prevent iron from oxidizing in the distribution system which can create objectionable color,
taste and odors. The western well pumps supply the western water distribution system as needed,
based on signals from the elevated stora.ge tanks and the eastern well pumps supply the eastern water
distribution system based on signals from the hydro pneumatic tank.
Two (2) elevated storage facilities stabilize pressure during peak water demands and also serve as
a source of water during fires or power outages. There is a total existing storage volume of 1.5
million gallons.
Ultimate V�ater System
The improvement program for Rosemount's ultimate trunk water supply and distribution systern is
expected to cost$71,571,900. Near term costs(present-2016) are expected to cost$21,774,900.
The costs are broken down into supply, storage, treatment,and distribution as follows:
�'
Water Supply &Distribution Plan 8
___ _ _ I
, _ _ _
- i .a-;,r., � _. � .
� ��. �'
Supply $2,550,000 $8,160,000 $10,710,000
Treatment $8,256,400 $17,450,000 $25,706,400
Storage $3,000,000 $8,250,000 $11,250,000
Distribution $7,968,500 $15,937,000 $23,905,500
Total $21,774,900 $49,797,000 $�1,571,900
The ultimate system shown on Figure 8 consists of the following:
• 21 new wells in the Jordan aquifer.
• 6.4 MGD Western Water Treatment Facility.
• 20.08 MGD Eastem Water Treatment Facility.
• 4 new 1.0 million gallon elevated storage reservoirs
• 1 new 1.5 million gallon elevated storage reservoir
• 1 new 1.0 million gallon elevated storage reservoir with a 2.0 million gallon ground reservoir
and booster station
• Over 70 miles of additional trunk water distribution mains and four pressure reducing '',,
stations.
The proposed ultimate system outlined in this plan differs from the 198$ and 1993 recammended
plans as follows:
1. The ultimate service area and land use has been updated.
2. An additional elevated reservoir is planned for the Western Service Area on the University
of Minnesota Property.
3. Elevated reservoirs proposed for the Eastern Service Area were reduced in size from 2.0 MG
to 1.0 MG and an additional 1.0 MG elevated reservoir and a 2.0 MG ground reservoir with
booster station were added.
4. 'I�vo large ueatment plants aze proposed instead of veatment plants at each well site as previously proposed.
�
Water Supply &Distribution Plan q
Recommendations
Based upon the results and analysis of this study,it is recommended that the City of Rosemount and
the Rosemount City Council:
1. Adopt this Water Supply and Distribution Plan and submit to the Metropolitan Council and
Department of Natural Resources for their approval.
2. Expedite acquisition of sites for wells, treatment facilities and storage facilities, and any
easements required to connect these sites to the water system and to minimize conflicts with
surrounding development.
3. Annually review the Supply-Storage Phasing Plan. The evaluation should review past water
use,planned development, and financing plan.
4. Install a water line along CSAH 42 from node 326 to the proposed elevated 1.0 million
gallon tower at node 2048,as shown on Figure 8. This will a11ow the Eastem portion of the
City and industrial azea along the intersection of CSAH 42 and U.S.Hwy 52 to receive water
from the existing system. Water demands near node 2048 (eastem)would first be met by the
the rural water system and as development spreads from the west to the east they would I
eventually be met by the existing water system(western treatrnent facility). !'
5. Initiate a comprehensive well field study of the Eastern Well Field to include/determine the
following:
a. The required spacing of Jordan and possible Mt. Simon-Hinkley wells in this area.
b. The effect of the fully developed well field on the existing contamination plume. The
City could have some liability if it alters the plume such that someone else's well
becomes contaminated.
c. The possibility of using other existing wells in the area such as the Peterson well andlor
the University of Minnesota wells. These wells would need to be checked for suitability
of conversion to a municipal well. Also,these wells would have to be checked to ensure
`�-% they will not influence the existing contamination plume.
Water Supply &Distribution Plan 10
. --
6. Revise the City's existing connection and area charge system in accordance with the
improvements recommended in this report. Consider including the future water treatment
plants' costs in these chazges. The recommended costs are as follows:
Area Chazge $2,428/Acre
Connection Charge $420/REU
Water Treatment Plants'Charge $610/REU
7. No buildings shall be constructed in the Western Service Area above the elevation 990 feet
and in the Eastern Service Area above 940 feet unless private booster stations are included.
8. Pressure Reducing Valves(PRVs)sha11 be provided in the Eastern Service Area.for buildings
constructed below the elevation of 865 feet.
Water Supply &Distribution Plan 11