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Bidjugde
JOB
(CMAR) Relining Steel Discharge Pipes and Manifolds
BID DATE
11/16/15 - 9:00
AGENCY
Central Arizona Project
ESTIMATE
$2,500,000
SCOPE
SHORTLIST 9/30/15; AWARD 11/10/15; The CAWCD operates and maintains the Mark Wilmer Pumping Plant, located between Parker, AZ and Lake Havasu City, AZ, on the Colorado River at Lake Havasu. The pumping plant draws about 1.6 million acre-feet (ac-ft) of water each year from the Colorado River and via six pumps, lifts the water through twotwelve foot diameter steel pipes about 840 feet to the Buckskin Mountain Tunnel. The maximum flow rate in each discharge pipe is 1800 cfs with a corresponding velocity of 16 fps. The interior of the pipes was lined in the early 1980s with hot applied coal tar enamel which is now at the end of its useful life. The pumps are arranged in two-sets of three units to be able to isolate three pumps, a single manifold, and a single discharge pipe so three units may be operated while the other three units and their associated manifold and discharge pipe can be isolated for maintenance. This right half of the plant will be available for maintenance the summer of 2016 and the left half summer of 2017. The two 144-inch diameter steel discharge pipes are each about 2,500 feet long and vary in slope from a minimum of about 9 degrees to a maximum of about 45 degrees John C. Harrison, CAWCD Contracting Officer (623) 869-2491 or by e-mail at jharrison@cap-az.com

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