Archive

Altoona Dam Gate Pier Reconstruction

Ayres’ dam inspection team found trunnion cracks and concrete spalls on the Altoona Dam piers and spillway ogee. Ayres completed the design and prepared plans and specifications for an epoxy injection project intended to re-establish the existing structural integrity of the radial gate trunnion pin piers. When the contractor started work, it was determined that… Read More »

Lake Bronson Dam

The Lake Bronson Dam creates the centerpiece of a state park in Kittson County in western Minnesota. The dam is a strong focal point of Lake Bronson State Park and is owned by the Minnesota Department of Natural Resources. The structure needs rehabilitation to address geotechnical, hydrologic, and operational deficiencies. As part of the effort… Read More »

Appalachian Region Floating Bulkhead

This hydroelectric facility in the Appalachian Region has nine spillway bays with large slide gates. To repair gates, a floating bulkhead was required to dewater each bay. Five spillway bays have a recessed ogee crest, and an extension was required on the bottom caisson to dewater the bays. The far-left bay required custom design of… Read More »