U.S. seeks removable spillway work at 810-MW Lower Monumental Dam

The U.S. Army Corps of Engineers seeks bids for modifications to a removable spillway weir used for fish passage at 810-MW Lower Monumental Dam in Washington. A site visit is scheduled Aug. 13, with bids due Aug. 28.

The Corps’ Walla Walla District previously called for information on firms capable of performing fish passage studies at Lower Monumental, on the Snake River.

The Corps installed a 120-foot tall, 80-foot wide, 1,000-ton removable spillway weir at Lower Monumental in 2007. The removable spillway weir is fitted into a spillway bay to allow juvenile salmon and steelhead to pass the dam near the water’s surface.

The Walla Walla District now seeks bids for modifications to the weir and to Spillbay 8. Concrete work in the spillbay includes removal of guard railing, a section of concrete traffic barrier, and electrical conduit in the work area. New concrete work includes rebar vertical anchor dowels and two layers of horizontal rebar. New electrical conduit and wire and new railing are to be installed.

While the removable spillway weir is deployed, the contractor is to relocate removable guardrail and provide additional removable guardrail and new banded bar grating. While the weir is in stored position, divers are to change out bolted connections.

The work is to be completed between October and December at a cost of $250,000 to $500,000.

A solicitation notice may be obtained from the Federal Business Opportunities Internet site, www.fbo.gov, by entering Solicitation No. W912EF13B0008 in the “Keyword/Solicitation #” box. A site visit is scheduled at 10 a.m., Pacific time, Aug. 13. Those planning to attend must register by Aug. 12 by e-mail to elaine.m.vandiver@usace.army.mil and benjamin.s.wolfram@usace.army.mil.

Bids are due Aug. 28. For information, contact Ben Wolfram, U.S. Army Corps of Engineers, Walla Walla District, 201 N. 3rd Ave., Walla Walla, WA 99362-1876; (1) 509-527-7232; E-mail: benjamin.s.wolfram@usace.army.mil.

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