1b Work Order Design Well 9CITYOF
CHANHASSEN
7700 Market Boulevard
PO Box 147
Chanhassen k/IN 55317
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MEMORANDUM
TO: Todd Gerhardt, City Manager
FROM' Matt Saam, Assistant City Engineer
DATE: January 20, 2004
SUBJ: Approve Consultant Work Order for the Design of Well No. 9
Project No. 03-02
REQUEST (Simple Majority Vote)
Staff requests the City Council approve a consultant work order in the amount of
$31,800 with Bolton & Menk, Inc. for the final design and bidding services for
Well No. 9.
BACKGROUND
On January 27, 2003, the City Council approved a work order with Bolton &
Menk in the amount of $19,000 for the siting of Well No. 9.
On July 14, 2003, the City Council approved a construction contract with Keys
Well Drilling in the amount of $22,685 for the construction ora test well at the
Well 3 site.
On January 12, 2004, the City Council approved Change Order No. 1 in the
amount orS11,483 to move the test well drilling from Well 3 to Sugar Bush Park.
DISCUSSION
The well siting and associated test well drilling have been completed on this
project. Bolton & Menk are recommending that the City construct Well No. 9 at
Sugar Bush Park. The test well results indicate that a Jordan aquifer well with a
capacity of 900-1,100 gallons/min, is probable at the site.
There are two options that staff considered in order to develop Well No. 9 at the
Sugar Bush Park site. The first would be to construct a wellhouse at the park and
pump into the distribution system. The second option is to install a raw water
transmission main from the park to the existing wellhouse at Well 3. Based on
Bolton & Menk's cost estimates (attached) for each option, the second option
could save the City, roughly, $150,000 in project costs. In addition, with the
installation of a transmission-only main (no service connections), the second
option would make it possible to connect both Wells 3 and 9 to a future water
The City of Chanhassen * A growing COI711Puelty With clean lakes qualit'~ s,,~ho(',is a ;i ~m71iqg de,¢,,nto,,~,,'l thri,,inq [)u~ihesse~ ,,',,u dl iq trai~s a: d ~:,c u~ti ~! p:u~s ,A ,: r{it [)hx, t, ii,'(: ,,*,',:,rk :it,J nih
treatment plant in the Galpin area. For these reasons, staff intends to pursue the
second design option on this project.
FINANCIAL SUMMARY
Budgeted Actual
Test Well $70,000 $53,768
Well No. 9 $900,000 $909,679*
Total $970,000 $963,447
*Cost Estimate
This project will be funded by the City's utility fund.
RECOMMENDATION
Staff recommends that the City Council approve a consultant work order with
Bolton & Menk, Inc. in the amount of $31,800 for the design of Well No. 9.
jills
Attachment: 1. Design Proposal Letter.
2. Design Memo and Cost Estimate.
C:
Kelley Janes, Utility Superintendent
Jon Peterson, Bolton & Menk, Inc.
Marcus Thomas, Bolton & Menk, Inc.
g:\eng\public\03-02\approvc consultant work order.doc
Consulting Engineers & Surveyors
1515 East Highway 13 * Burnsville, MN 55337-6857
Phone (952) 890-0509 * FAX (952) 890-8065
lNG.
January l3,2004
Mr. Matt Saam, P.E.
Acting City Engineer/Public Works Director
City of Chanhassen
7700 Market Boulevard
Chanhassen, MN 55317
Re: Sugar Bush Park Well Improvements
CI'I'YOFCHANHASSEN
JAN 1 6
ENGINEERING DEP~
Dear Mr. Saam:
In preparation for the final design phase of the above-referenced project, we have
reevaluated the scope of work for the project and offer you this updated final design
proposal for your consideration. Our original proposal dated January 21, 2003, involved
the design of a single well and treatment location which would be tied directly to the
City's existing water distribution system. As you are aware, our preliminary findings
determined that constructing a new well at Sugar Bush Park and treating the water at the
existing Well #3 site would be the most effective method of increasing the City's water
supply. In general, this alternative will include constructing the new well and pump at
Sugar Bush Park, transmitting'the raw water alOng the'W6st'boulevard of Galpin
Boulevard, crossing Galpin Boulevard at the Well #3 site, connecting the raw water line
into the treatment system at Well #3, restoration of the boulevard and trail along Ga!pin
Boulevard, and the construction ora kiosk or other type of park amenity to conceal the
well and pump at Sugar Bush Park.
Our updated work tasks and fees to develop final plans for this alternative are as follows:
Task
2.1
2.3
2.4
2.5
2.6
2.7
2.8
Description
Topographic Survey
~eot~clu~lca! Evaluation
Well and Pump Design
Well House and Controls Design Modifications
Raw Water Distribution Design
Landscape Design
Bidding Services
City Staff/Council Meetings
Total Final.DeSign Fees ..
Fee
$ 4,400
$ 3,000
$ 1,600
$ 7,000
$ 8,800
$ 2,OOO
$ 3,2OO
$ 1,80.0
$31~800
The fees for the individUal work tasks are es. timaf~sii:'..We proPose ~o' dornPle~e the s~ope;;
of work as described above tbr a price not to exceed:S31,800. .
MANKATO *
FAIRMONT · SLEEPY EYE · BURNSVILLE * WILLMAR ° CHASKA
AMES, IA · UBERTY, MO
An Equal Opportunity Employer
Please let us know if our updated proposal meets your approval. We are prepared to
begin work on this phase of the project immediately. If you have any questions regarding
this proposal or wish to discuss its details, please do not hesitate to call. Thank you for
allowing Bolton & Menk, Inc. to be of service to you and the City of Chanhassen.
Sincerely,
BOLTON & MENK, INC.
Marcus A. Thomas, P.E.
Associate Engineer
Jon Feterson, F:E., BMi
Date:
To:
From:
Subject:
MEMORANDUM
January 16, 2004
Matt Saam, P.E.- City of Chanhassen
Kelley Janes, City of Chanhassen
Jon D. Peterson, P.E. - Bolton & Menk, Inc.
Well No. 9
Pre-Design Memorandum
Introduction
The purpose of this design memorandum is to summarize the investigation into potential well sites, the
test well drilling completed to date, and provide a preliminary plan and cost estimate for the proposed
construction of Well No. 9. In addition, a schedule for completion of the project will be included.
Site Evaluation
In determining the potential sites for construction of Well No. 9, several factors were evaluated. These
include the following:
Aquifer potential
Availability of site
· Flexibility in long-term function of well at this site (i.e. proximity to potential future water
treatment plant site)
· Estimated cost
During this evaluation, three potential sites were identified. Attachment 1 provides a matrix which
summarizes the evaluation of these three sites.
Based on this site evaluation, the sites were prioritized as follows: 1. Well House #3 Site - Surficial Aquifer Well
2. Sugar Bush Park Site - Jordan Aquifer Well
3. Pheasant Hill Park Site - Jordan Aquifer Well
Test Well Results
In order to verify the availability of a surficial aquifer water supply at the Well House #3 Site, a test well
was authorized. The intent of this test well was to determined whether a layer of rock and gravel xvhich
was identified on the boring logs for Well #3 is a water bearing formation and what the ~vater quality in
this aquifer would be. The well driller (Keys Well Drilling of St. Paul, MN) began an 8" bore hole at the
site. At 267 ft. of depth, the test well operation was stopped at this site. No gravel or rock layer with
water bearing potential was identified and further boring was deemed to be non-productive. At this point,
a test well on the Sugar Bush Park Site was authorized.
At the Sugar Bush Park Site, the goals of the test well were: · Determine whether the Jordan aquifer is viable at this site.
· Determine water quality parameters for a Jordan well at this site.
Design Memorandum
January 16, 2004
Page 2
A test well with 413 L.F. of 8" casing, and 87 L.F. of 4" diameter open hole below the casing was
constructed on this site. The test xvell was pumped for 6.5 hours at a rate of 40 gpm, with a draxvdown in
the well of 5 feet. The static water level in this well was 151 feet below grade. The available Jordan
aquifer at this site appears to be 87 feet thick. At other Jordan well sites in the city, the aquifer varies
from 183 feet to 111 feet in thickness. This indicates that this well site is on the "thin" edge of the Jordan
aquifer in this area. Based on this information, a well at this site will likely yield between 900 to 1100
gpm, depending on the final well configuration and conditions.
Water quality tests were also conducted on samples taken from the test well. Constituents of primary
interest are summarized in the following table, for comparison purposes, the constituents have been
included for Wells 3, 7 and 8, which are similar existing Jordan Well on the system.
Parameter Test Well #9 Well 3 Well 7 Well 8 Water Quality
Goal
Gross Alpha 9.73 pCi/L N/A N/A N/A 15 pCi/L
Ra 228 + 226 3.52 pCi/L .92 2.03 2.16 5 pCi/L
Arsenic 0.294 ug/L <2.0 <2.0 <2.0 10 ug/L
Manganese 0.221 mg/L 0.4 0.31 0.37 0.05 mg/L
Iron 0.535 mg/L 0.081 0.32 0.035 0.3 mg/L
The water quality results indicate that radium and arsenic will not be an issue with a well at this site. The
secondary contaminants of iron and manganese are similar to other Jordan Wells' in the City system.
Thus, based on this test well information, a production well is feasible at the Sugar Bush Park Site.
Well Implementation
Two options are available for utilizing the Sugar Bush Park Site for a production well site. Option 1
involves construction of a well house on this site, and pumping directly into the water distribution system.
Option 2 involves constructing a water transmission main to Well House #3, and providing metering and
chemical treatment (disinfection and fluoridation) at the existing well house. The detailed estimated
capital cost for each of these options are attached for reference. The least costly capital project based on
these estimates is Option 2 - construction of the well with a water transmission main to Well House #3.
In addition, this option maximizes the use of existing facilities, and with the construction of a 16" water
transmission main, provides for a future well connection to a potential water treatment plant site. With
either option, the impact on the xvater distribution system should be minimal. Location of the well at
Sugar Bush Park will require an Amendment to the Well Head Protection Plan, Drinking Water Supply
Management Area (DWSMA) as this site is adjacent to the current DWSMA boundary. These items will
be verified and coordinated during final design stage.
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Design Memorandum
January 16, 2004
Page 3
Implementation Schedule
Two separate contracts are proposed for the construction of this project. One contract will focus on the
well construction, the second contract will focus on the water transmission main construction and well
house improvements. The proposed implementation schedule for the implementation of the
recommended alternative is as follows:
Date
Prepare Contract Documents January/February 2004
Advertise for Bids February 27, 2004
Open Bids March 16, 2004
Award Contracts March 22, 2004
Begin Construction April 2004
Substantial Completion June 2004
Final Completion July 2004
Attachments
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Design Memorandum
January 16, 2004
Page 4
Attachment 1
Site Evaluation Matrix
City of Chanhassen, MN
Well No. 9
Site Aquifer Potential Site Availability Long-Term Estimated
Function Capital Cost
1. Well House < Surficial Aquifer < Current City < Would be piped $470,000
#3 < Jordan Aquifer not Well Site. to a potential WTP in
feasible due to close < Utilizes the conjunction with
proximity to existing existing piping Well #3
Well #3 setup in Well House
#3
2. Sugar Bush < Jordan Aquifer < Current park < Could be piped $1,070,000
Park (similar to existing site to a potential WTP in (with ~vell house)
wells on west side) < Site available conjunction with $910,000
for potential well Well #3 (piped to well
house house #3)
< Alternate
option would be to
install a submersible
well pump and
connect to Well
House #3
3. Pheasant < Jordan Aquifer < Current park < Connection to $1,050,000
Hill Park site future WTP site more
< Site is wooded, difficult than other
with limited options
building sites
available
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Design Memorandum
January 16, 2004
Page 5
Attachment 2
Option 1 - Construct a Jordan Aquifer Well on Sugar Bush Park Site with Well House on Site
Cost Estimate
City of Chanhassen, Minnesota
Well No. 9
Quantity Unit Unit Price Amount
Mobilization/Demobilization 1 LS $50,000.00 $50,000.00
Drill and drive 30" Casing 200LF $180.00 $36,000.00
F&I 24" Casing inside 30"Casing 200 LF $60.00 $12,000.00
Drive 24" Casing 110LF $120.00 $13,200.00
Drill 23" hole 210LF $100.00 $21,000.00
F&I 20" casing 415 LF $65.00 $26,975.00
Grout 50CY $350.00 $17,500.00
Well Development 120 HRS $200.00 $24,000.00
Test Pump Mob/Demob 1 LS $5,000.00 $5,000.00
Test Pumping 100 ttRS $125.00 $12,500.00
Bailing 800 CY $75.00 $60,000.00
Water Analysis 1 LS $1,500.00 $1,500.00
Video Tape 1 LS $2,500.00 $2,500.00
Gamma Log 1 LS $2,500.00 $2,500.00
F& I Pump 1 LS $60,000.00 $60,000.00
Electrical/Controls 1 LS $45,000.00 $45,000.00
Site Grading 1 LS $2,000.00 $2,000.00
Common Borrow 50CY $10.00 $500.00
Topsoil Borrow 50CY $15.00 $750.00
Bituminous Driveway 250 SY $25.00 $6,250.00
10" Watermain 120 LF $30.00 $3,600.00
90 deg el Watermain Fittings 3 EA $2,500.00 $7,500.00
Sod Type Lawn 800 SY $5.00 $4,000.00
Silt Fence 260 LF $2.50 $650.00
Well House Construction 1 LS $350,000.00 $350,000.00
6' Arbovitae 6 EA $500.00 $3,000.00
Subtotal $767,925.00
Project Contingencies (7%) $53,754.75
Engineering/Admin (30%) $246,503.93
Total Project Cost $1,068,183.68
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Design Memorandum
January 16, 2004
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Attachment 3
Option 2 - Construct a Jordan Aquifer Well on Sugar Bush Park Site with Connection to Well
House #3
Cost Estimate
City of Chanhassen, Minnesota
Well No. 9
Quantity Unit Unit Price Amount
Mobilization/Demobilization 1 LS $50,000.00 $50,000.00
Drill and drive 30" Casing 200LF $180.00 $36,000.00
F&I 24" Casing inside 30"Casing 200LF $60.00 $12,000.00
Drive 24" Casing ll0LF $120.00 $13,200.00
Drill 23" hole 210LF $100.00 $21,000.00
F&I 20" casing 415 LF $65.00 $26,975.00
Grout 50CY $350.00 $17,500.00
Well Development 120 HRS $200.00 $24,000.00
Test Pump Mob/Demob 1 LS $5,000.00 $5,000.00
Test Pumping 100HRS $125.00 $12,500.00
Bailing 800 CY $75.00 $60,000.00
Water Analysis 1 LS $1,500.00 $1,500.00
Video Tape 1 LS $2,500.00 $2,500.00
Gamma Log 1 LS $2,500.00 $2,500.00
F& I Pump 1 LS $60,000.00 $60,000.00
Electrical/Controls 1 LS $45,000.00 $45,000.00
Site Grading 1 LS $2,000.00 $2,000.00
Common Borrow 50CY $10.00 $500.00
Topsoil Borrow 50CY $15.00 $750.00
Bituminous Driveway 2500 SY $25.00 $62,500.00
10" Watermain 285 LF $30.00 $8,550.00
90 deg el Watermain Fittings (10") 4 EA $2,500.00 $10,000.00
Tee ( 10'x 16") 2 EA $3,500.00 $7,000.00
Gate Valve (10") 2 EA $2,000.00 $4,000.00
Check Valve (10") 1 EA $3,000.00 $3,000.00
Tee (10') 1 EA $2,000.00 $2,000.00
16" Watermain 1760 LF $50.00 $88,000.00
Seeding/restoration 1.5 AC $5,000.00 $7,500.00
Jack and Auger 18" steel casing 60 LF $150.00 $9,000.00
Sod Type Lawn 800 SY $5.00 $4,000.00
Silt Fence 5000 LF $2.50 $12,500.00
Park Structure 1 EA $40,000.00 $40,000.00
6' Arbovitae 6 EA $500.00 $3,000.00
Subtotal $653,975.00
Project Contingencies (7%) $45,778.25
Engineering/Admin (30%) $209,925.98
Total Project Cost $909,679.23
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