NWW Waterstop Repairs   3

Background
This will be a firm fixed-price 5-year construction requirements contract for the Walla Walla District. The estimated value of the base contract plus four option years is between $2/5 MIL-$5MIL.

Work Details
Task orders will be issued to repair failed waterstops within the Walla Walla District concrete structures that have been leaking for many years. Locations include Dworshak Dam, Ice Harbor Dam, Little Goose Dam, Lower Granite Dam, Lower Monumental Dam, and McNary Dam (Idaho, Oregon and Washington). The proposed repair work will involve drilling out existing waterstop material in those holes that have had material and/or drilling new holes, tremie grouting any voids within the joint, and installing hydrophilic urethane cylinders in the holes. The cylinders will form new waterstop systems. Drill holes will be 6 and 8 inches in diameter and hole depths are estimated to be in the 100-400 foot range.

Period of Performance
The contract performance period is one base year, which begins on the date of contract award. The government may exercise up to four options to extend the contract period for up to four additional years of contract performance.

Place of Performance
The geographic locations where the construction projects will be performed include Dworshak Dam, Ice Harbor Dam, Little Goose Dam, Lower Granite Dam, Lower Monumental Dam, and McNary Dam in Idaho, Oregon, and Washington.