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?