Corps extends bidding for weir, structures at Canton Lake Dam

The U.S. Army Corps of Engineers has extended the bidding deadline for construction of a concrete weir and hydraulic structures as part of an auxiliary spillway at Canton Lake Dam on the North Canadian River in Oklahoma. Bids now are due July 6.

The Corps' Tulsa District previously called for bids June 30.

Canton Dam, a 68-foot-tall, 15,140-foot-long earth-filled embankment, includes a 778-foot-wide service spillway at the right abutment with 16 tainter gates. Corps hydraulic studies found the existing spillway is unable to discharge a probable maximum flood and the dam is likely to fail during a major flood.

To address the inadequate spillway capacity, the Corps has begun construction of an auxiliary spillway at the right abutment. Under the current contract, a 480-foot-wide auxiliary channel has been partially excavated. Fifty-foot-tall vertical diaphragm walls line the channel. The Corps chose a Fusegate system from Hydroplus Inc. for the new spillway.

The Corps now seeks bids for the next phase of the work, including placement of a concrete weir approximately 35 feet deep and 70 feet long spanning the width of the channel. Other work includes a 40-foot-tall water intake monolith with a 47- by 15-foot base; 250 feet of 11-foot-diameter conduit; 30-foot-tall, 50-foot-wide Fusegates, diaphragm walls with anchors; and stoplog manufacture. The contractor will be required to submit a comprehensive shoring plan for existing diaphragm walls during construction.

The work is valued at between $25 million and $100 million.

A solicitation notice may be obtained from the Federal Business Opportunities Internet site, www.fbo.gov, by entering Solicitation No. W912BV11R0008 in the "Keyword/Solicitation #" box.

Bids now are due July 6. For information, contact Jonathan Nadig, Contract Specialist, U.S. Army Engineer District, Tulsa, CESWT-CT, 1645 S. 101st East Avenue, Tulsa, OK 74128-4609; (1) 918-669-7041; E-mail: jonathan.nadig@usace.army.mil.

For more hydropower tenders, click here.



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