Durham AWWRF Grit System Rehabilitation

BID CLOSE DATE

2022.10.27

BID CLOSE TIME

2:00 pm

PROJECT LOCATION

Tigard, OR

LEAD ESTIMATOR

Brint DeVilling

PHONE

360-225-7996

EMAIL
[email protected]
PROJECT DESCRIPTION

1. Remove and replace all grit piping and fittings with glass-lined ductile iron pipe and fittings in Pump Room 306, Grit Storage Room 308, and Screen Room 309.
2. Remove and replace all existing grit piping plug valves on grit pump suction and discharge piping.
3. Replace the high-wear liner section of the Wemco Wemclones with new liner material.
4. Remove and replace grit basin mechanical assemblies, including installing a Pista® Grit fluidizer in each grit basin. The grit basin equipment will be furnished by the Owner.
5. Remove and replace the existing centrifugal blowers with one positive displacement blower, including reconfiguring the existing equipment base and connecting piping.
6. Reconfigure the influent upwell low-pressure air piping and install new control valves, flow indicators, and diffusers.
7. Remove and replace the existing influent upwell drain valves.
8. Install a new motor control center (MCC) section with breakers. The MCC section and breakers will be furnished by the Owner.
9. The Work also includes furnishing and installing related equipment, conduits, electrical, instrumentation control, and other appurtances necessary to complete the Work and to provide a complete and functional grit basin, grit pumping, and blower system constructed in accordance with the Contract Documents.

Available Project Information