Dubuque Water Supply Well Repair and Rehabilitation Project_Awarding Contract Copyrighted
November 2, 2020
City of Dubuque Action Items # 1.
City Council Meeting
ITEM TITLE: Dubuque Water Supply Well Repair and Rehabilitation Project 2020
(Wells 3, 6, and 8)
SUM MARY: City Manager recommending award of the Dubuque Water Supply Well
Repair and Rehabilitation Project 2020 (Wells 3, 6, and 8) contract to the
low bidder Peerless Well & Pump.
RESOLUTION Awarding Public I mprovement Contract for the Dubuque
Water Supply Well Repair and Rehabilitation Project 2020 (Wells 3, 6,
and 8)
SUGGESTED Suggested Disposition: Receive and File;Adopt Resolution(s)
DISPOSITION:
ATTACHMENTS:
Description Type
Dubuque Water Supply Well Repair and Rehab City Manager Memo
Project-MVM Memo
Staff Memo Staff Memo
Award Resolution Resolutions
Dubuque
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TO: The Honorable Mayor and City Council Members
FROM: Michael C. Van Milligen, City Manager
SUBJECT: Award of the Dubuque Water Supply Well Repair and Rehabilitation
Project 2020 (Wells 3, 6 and 8)
Project (CIP 7401415)
DATE: October 27, 2020
Sealed bids were received for the Dubuque Water Supply Well Repair and
Rehabilitation Project 2020 (Wells 3, 6 and 8). Water Department Manager Denise
Blakeley Ihrig recommends award of the contract to the low bidder, Peerless Well &
Pump, in the estimated amount of $74,691.
I concur with the recommendation and respectfully request Mayor and City Council
approval.
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Mic ael C. Van Milligen
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Attachment
cc: Crenna Brumwell, City Attorney
Cori Burbach, Assistant City Manager
Denise Blakeley Ihrig, Water Department Manager
Dubuque
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TO: Michael C. Van Milligen, City Manager
FROM: Denise Blakeley Ihrig, Water Department Manager
DATE: October 26,2020
RE: Award of the Dubuque Water Supply Well Repair and Rehabilitation
Project 2020 (Wells 3,6, and 8)
Project (CIP 7401415)
INTRODUCTION
The purpose of this memorandum is to award the Dubuque Water Supply Well Repair
and Rehabilitation Project 2020 (Wells 3,6, and 8) through the adoption of the attached
resolution.
BACKGROUND
The City of Dubuque's source water supply is pumped from five shallow and four deep
wells.
The five (5) shallow alluvial wells, Wells 2, 3, 4, 9, and 10, are located on the Hawthorne
Street boat ramp peninsula of the Mississippi River. Well depths vary from 127 feet to
200 feet below ground level, and all are cased to 100 feet. Individual well capacities
range from 1.55 to 3.30 million gallons per day (MGD), with a theoretical combined
capacity of all five wells at 14.15 MGD.
The four (4) deep wells, Wells 5, 6, 7, and 8, are located within a 1,500-foot radius of
the treatment plant. The wells are cased to 500 feet below ground elevation and
individual well depths vary from 1,000 feet to 1,800 feet below ground. The individual
well capacities range from 0.9 to 3.25 MGD with the theoretical combined capacity of
9.6 MGD.
The City's Water Department operates and maintains the wells to their maximum
available capacity to ensure the City is ready to serve changing water demands. The
wells are operated in rotation to allow water levels to recover in the well column and to
reduce and prevent cavitation of the well pump in the event the water column is drawn
down too far. The wells must also be maintained to ensure the pumps are operating
efficiently, the well casing is in good condition, identify issues with the well borehole,
and inspect the air and sample lines.
DISCUSSION
Well No. 3 and Well No. 6
Well No. 3 was constructed in 1956, it is 28-inches in diameter to a depth of 200-ft, and
has an average pumping capacity of 3.5-million gallons per day. The well is formed in
the alluvial sand and gravel geology along the Mississippi and has been identified as
having loss or reduction in pumping capacity. The loss, based on earlier maintenance
records showing application of an acid, is indicative that there was most likely mineral
scaling which would plug the well screen and reduce pumping capacity. The acid is
used to dissolve the mineral deposits. The well was treated with an acid application in
1963, 1982, 1995, and was jetted in 2013. Current measurements show the well to be
pumping an average 2.5 MGD or 40% below its capacity. Further, in July 2020, the well
tested present for total coliforms, while no fecal coliforms were present, the well was
taken off line pending further investigation. The well site was inspected by William
O'Brien from Water & Resource Recovery Center and it was determined the sampling
line and sampling port should be relocated and replaced during well maintenance. In
addition, as it is unclear where the coliforms are originating, the well should also be
shock chlorinated along with all internal well lines.
Well No. 6 was constructed in 1935, is 24-inches in diameter to a depth of 1,504-ft, and
has an average pumping capacity of 2.5-million gallons per day. The well has been
identified as having loss or reduction in pumping capacity. The reduction in pumping
capacity is attributed to possible wear and tear on the pump bowls and the location of
the pumping bowl assembly in the well borehole. The current pump is estimated to be
producing 1.5 MGD or 1,050 gallons per minute at a pump efficiency of 63%. According
to pump manufacturers, the BEP or best efficiency point will be experienced between
70% and 120%, according to the Hydraulic Institute the optimum best efficiency point is
85%. If a pump is operating outside of its BEP, energy is wasted leading to increased
electricity costs and the pump will most likely experience premature wear and tear
leading to loss of pumping capacity. Well No. 6 was last inspected in 2003.
In both cases, to more accurately determine if the loss of capacity is associated with
pump wear and tear or other well borehole issues such as screen plugging, the
recommendation is to obtain cost estimates from a State of lowa certified well and pump
contractor to pull the pump bowl assembly from the well, inspect the pump and
appurtenances along with an inspection of the borehole.
Scope of Work
Under the Base Bid, the contractor will be responsible for disconnection of the motor
and removal of the pump bowl assembly. The contractor will then remove the well
column pipe so the wells can be televised to determine the condition of the borehole,
screen, gravel pack, and casing. Having removed the motor, pump bowl assembly, and
column pipe, the contractor will perForm an inspection and examination of the pump,
motor, and column pipe in a controlled environment where an in-depth evaluation of the
assembly can be conducted to determine if the pump assembly or column pipe needs to
be replaced or rehabilitated to improve efficiency.
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To aid in timely and reduction in downtime, the request for bid also included a Unit Price
Item Schedule. The schedule includes the replacement costs for pump assembly,
column pipe rehabilitation, shock chlorination, and application of an acid or air-shocking
to dislodge mineral deposits. These items can only be determined to be necessary at
the time of removal. Labor costs per hour were also provided for any work above the
base bid.
Well No. 8
Well No. 8 was last repaired and rehabilitated in 2016, however the air-line is no longer
functioning properly to provide the well water levels. It is necessary to report the static
and pumping water levels to the lowa Department of Natural Resources and should be
resolved as soon as possible.
PROJECT SCHEDULE
The schedule for the project is as follows:
Initiate Public Bidding Process September 21, 2020
Publish Notice to Bidders, Advertise for Bids September 25, 2020
Publish Public Hearing Notice on Plans & Specs September 25, 2020
Public Hearing on Plans & Specs October 5, 2020
Receipt of Bid Proposals (Bid-Letting) October 22, 2020
Award Construction Contract November 2, 2020
Project Completion Date March 31, 2021
BID RESULTS
Two sealed bid were received on Thursday, October 22, 2020 and publicly opened via
GoToMeeting, for the Dubuque Water Supply Well Repair and Rehabilitation Project
2020 (Wells 3,6, and 8). Peerless Well & Pump, Dubuque, lowa submitted the
apparent low base bid in the amount of$31,460, and provided a Unit Price Item
schedule to be used following well pump removal and inspection via televising, to verify
the rehabilitative work that will be necessary. The Unit Price Item Schedule includes
pricing for replacement pump assemblies in Wells 3 and 6, replacement column piping
and stainless steel shafts in Well No. 6, and a check valve, submersible cable, and drop
pipe in Well No. 3. Until inspected it is unclear as to which of these of items will need to
be replaced.
Per the bid specifications, the award will be based on the base bid only, with other work
to follow based on submitted Unit Price Item Schedule at established rates. The
following bid summary shows the base bid and an estimated total of work, not including
labor, that may be required to complete repair and rehabilitation:
Item Base Bid Summary Est. of Est. Total, not
No. Contractor Name Amount Unit Price Items includin labor
1 Peerless Well & Pump $31,460.00 $43,231.00 $74,691.00
2 Cahoy Pump Service $55,584.00 $57,905.00 $113,489.00
3
Each contractor also provided machine shop labor rates and field crew rates for any
work above and beyond the Base Bid scope:
Item No. Contractor Name Machine Shop Field Crew
Rate/ man-hour Rate/ crew-hr
� Pumless Well & $160.00 $230.00
2 Cahoy Pump �$$ �� $245.00
Service
RECOMMENDATION
The recommendation is to award the contract the Dubuque Water Supply Well Repair
and Rehabilitation Project 2020 (Wells 3,6, and 8) to Peerless Well & Pump of
Dubuque, lowa in the amount of$31,460.00 plus costs, listed in the Unit Price Item
Schedule as approved by the Change Order process, estimated to be $43,231 plus
labor at the provided labor rates.
BUDGETIMPACT
The project was bid to obtain economy of scale and to ensure the sequence of taking
wells off line is carefully coordinated with one contractor and the operations staff without
loss of production.
The original estimate of probable cost for the Dubuque Water Supply Well Repair and
Rehabilitation Project 2020 (Wells 3, 6, and 8) at the time of initiating the project for bid
was:
Description Oriqinal Estimate
Construction Contract $170,000
Contingency (10%) $17,000
Construction Engineering & Inspection (10%) $18,700
Estimated Total Project Cost $205,700
The favorable bids, position the project to be less than the estimate of probable cost,
and estimated to be closer to $74,691, plus labor and contingency, for a revised total
estimate of $93,500.
Construction inspection will be completed by Water Department staff at a savings of
$18,700.
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Description Revised Estimate
Construction Contract— Base Bid $31,460
Unit Price Item Schedule, all Items $43,231
Labor Estimate $10,000
Contingency, 10% $8,500
Construction Engineering & Inspection (10%) $0
Revised Estimated Total Project Cost $93,191
FUNDING SOURCE
I have confirmed with Jennifer Larson, Director of Finance and Budget that Capital
Improvement Project 7401415 is available to fund the project.
The summary of available funds is:
CIP NO. Fund Description Amount
7401415 Wells Rehabilitation $250,000
The available resource balance after the project is estimated to be $156,809.
ACTION TO BE TAKEN
The City Council is requested to award the Dubuque Water Supply Well Repair and
Rehabilitation Project 2020 (Wells 3,6, and 8) to Peerless Well & Pump in the amount of
$31,460.00 plus costs, listed in the Unit Price Item Schedule as approved by the
Change Order process, estimated to be $43,231 plus labor at the provided labor rates
provided through the adoption of the attached resolution.
cc: Jenny Larson, Director of Finance & Budget
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Prepared by Denise Blakelev-Ihrig. Water Department Manager Address: 901 Hawthorn St. Telephone: 563-589-4290
Return to: Adrienne N., Breitfelder, City Clerk Address: City Hall- 50 W. 13th St Telephone: (563) 589-4100
RESOLUTION NO. 336-20
AWARDING PUBLIC IMPROVEMENT CONTRACT FOR THE DUBUQUE WATER
SUPPLY WELL REPAIR AND REHABILITATION PROJECT 2020 (WELLS 3, 6, AND
8)
Whereas, sealed proposals have been submitted by contractors for the Dubuque
Water Supply Well Repair and Rehabilitation Project 2020 (Wells 3, 6, and 8), (the
Project) pursuant to Resolution No. 299-20 and Notice to Bidders published on the City
of Dubuque, Iowa website and plan room service with statewide circulation on the 25th
day of September 2020; and
Whereas, said sealed proposals were opened and read on the 22nd day of October
2020 and it has been determined that Peerless Well & Pump of Dubuque, Iowa, in the
base bid amount of $31,460.00, is the lowest responsive, responsible bidder for the
Project.
NOW THEREFORE, BE IT RESOLVED BY THE CITY COUNCIL OF THE CITY OF
DUBUQUE, IOWA THAT:
A Public Improvement Contract for the Dubuque Water Supply Well Repair and
Rehabilitation Project 2020 (Wells 3, 6, and 8) is hereby awarded to Peerless Well &
Pump and the City Manager is hereby directed to execute a Public Improvement
Contract on behalf of the City of Dubuque for the Project in the amount of $31,460.00
plus costs, listed in the Unit Price Item Schedule as approved by the Change Order
process, estimated to be $43,231 plus labor at the provided labor rates.
Passed, adopted and approved this 2nd day of November 2020.
Roy D. Buol, Mayor
Attest:
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Adrienne N. Breitfelder, City Clerk