Flow Deflectors--Proven Technology
Is the flow deflector technology, a proven solution for preventing abrasion damage; thereby resulting in substantial operation and maintenance (O&M) cost savings?
Flow deflectors for preventing abrasion damage were developed by the Water Resources Research Laboratory under the Science and Technology (S&T) program (Project #, 81, Flow deflectors for preventing Type II and Type III stilling basin abrasion damage , 2008) (widespread application). Thus far, the first prototype deflector installed at Mason Dam, Idaho, has shown great success in preventing damaging materials from entering the basin. However, often regional and field offices are hesitant to spend their scarce dollars towards anything that they don't believe has been fully "proven"--even though it may result in substantial cost savings. Therefore, without a follow-up on the basin's condition over the next several years we will not be able to provide the data necessary to show that this technology has been substantially proven and it may therefore go unused in many places where it could result in a significant reduction in O&M costs.
Need and Benefit
The Pacific Northwest Region dive team will be used each year for the inspection. They have experience in conducting the previous inspections at Mason Dam and are aware of what details are important to document. They are familiar with the condition of the basin from previous inspections; therefore, they are more likely to pick up on subtle changes.
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