Industrial painting bids will be accepted May 6 for coating and related work on the Lake Chelan Dam, in central Washington State.
The painting contract is estimated at $600,000.
Scope of Work
The project involves coating spillway gate surfaces and surge tank legs at the dam, formally known as the Lake Chelan Hydroelectric Project, which is owned by the Chelan County Public Utility District No. 1.
The contract includes one gate, but the owner may elect to add a second gate by change order.
|The Lake Chelan Dam, surrounded by wilderness and forest lands, serves central Washington State. |
The gate, trunnion, support beam, and arm surfaces, as well as the surge tank legs and diagonal tie rods, will be abrasive blast-cleaned to SSPC-SP 10 (near white) and coated with a three-coat, micaceous iron oxide-filled, moisture-cured urethane system.
The existing coatings contain lead, cadmium, chromium and PCBs (trace amounts on gates; high lead content on tank legs). Containment will be required.
About the Dam
The dam, about 32 miles north of Wenatchee, WA, was built to raise the level of Lake Chelan and provide water for the area. It is located at the lower end of the 55-mile-long, 32,000-acre lake, which has depths of more than 1,500 feet and is bordered by more than two million acres of national forest lands.
The first dam on the site washed out the same year it was built (1892) and was replaced by a dam that was washed out two years later. The current dam, which began operation in September 1927, is the fourth one on the site.
The dam is a steel-reinforced concrete gravity structure, 40 feet high and 490 feet long, with eight spillway bays. The 2.2-mile-long penstock is an underground concrete and steel tunnel that delivers water from the dam to its powerhouse at Chelan Falls—a vertical drop of nearly 400 feet. The surge tank reduces hydraulic pressure in the penstock.
Reported by Paint BidTracker
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