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Water Pipeline and Reservoir Bid Alternatives – Value Engineering
Kyle Thompson, P.E., CFMRyan Salisbury, P.E.
Outline● Project Overview● Project Background● Water Transmission Main● Water Storage Reservoirs● Bidding
Project Overview● Location: Saco, Montana
Project Overview● Water system layout
Outline● Project Overview● Project Background● Water Transmission Main● Water Storage Reservoirs● Bidding
Project Background● Capital Improvements Plan (CIP) &
Preliminary Engineering Report (PER) completed previously by Barry Damschen Consulting
● Phase I Improvements completed in 2008
Project Background● Barry Damschen Consulting teamed with
WGM Group● Phase II Improvements completed in fall of
2010
Outline● Project Overview● Project Background● Water Transmission Main● Water Storage Reservoirs● Bidding
Water Transmission Main● WGM recommended HDPE as an alternate
pipe material type● HDPE is widely used in the water
distribution industry
Water Transmission Main● American Water Works Association
(AWWA) Standard C906● Montana Department of Environmental
Quality (MDEQ) approved● AWWA Design Manual M55
Water Transmission Main● General attributes of HDPE
– Pipe Length– Flexibility– Joints– IPS and DIPS
Water Transmission Main● Considerations for HDPE pipe
– Technical Specification– Bedding– Poisson Ratio– Connections– Working Pressure Class– Construction Time
Water Transmission Main
Water Transmission Main
Water Transmission Main
Water Transmission Main● Typical uses
– Natural gas industry– Water transmission and distribution– Temporary construction setup– Directional Boring
Outline● Project Overview● Project Background● Water Transmission Main● Water Storage Reservoirs● Bidding
Water Storage Reservoir● Different reservoir types to choose from
– Steel● AWWA D100: Welded Tanks● AWWA D103: Bolted Tanks
Water Storage Reservoir● Different reservoir types to choose from
– Concrete● Cast-in-place● AWWA D110: Wire- and Strand-Wound
Prestressed Tanks● AWWA D115: Tendon-Prestressed Tanks
Water Storage Reservoir● Town of Saco wanted to bid three
alternates– Glass-Lined Bolted Steel– Welded Steel– Wire-Wound Prestressed Concrete
Water Storage Reservoir● Required equivalent technical
specifications● Required complete designs for both steel
and concrete options
Outline● Project Overview● Project Background● Water Transmission Main● Water Storage Reservoirs● Bidding
Bidding● Traditionally, engineer makes selection in
PER● Based on Life Cycle Analysis● Uses budgetary numbers for construction
items
Bidding● This project used bid prices combined with
a O&M factor to determine successful bidder
– Considered maintenance items only● O&M factor not made public prior to the bid
opening
Bidding● Method reviewed and approved by funding
agency● Method specified in the Contract
Documents
Schedule Bid Price + Estimated Maintenance Costs
= Total
Tank A $10 $90 $100Tank B $30 $65 $95Tank C $40 $40 $80
Bidding● Bid Totals:
● Total Savings: $40,090
Schedule Total CostGlass Lined Bolted Steel
$510,800
Epoxy Welded Steel No BidsPrestressed Concrete $489,630
Schedule BidC900 PVC Water Main $468,030C906 HDPE Water Main
$449,110
Special Thanks● Barry Damschen, P.E. of Barry Damschen
Consulting, LLC● Pat Crowley of Crowley Consultants,LLC
Questions?
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