Whetstone Creek Conservation Area Big Lake Dam Repair

City of York

The project will consist of the installation and maintenance of erosion and sedimentation control devices, lowering pond water surface (if necessary), establish a staging area, clearing and grubbing of existing trees, brush and other vegetation as necessary, grade the emergency spillway area, construct the new concrete emergency spillway including side walls, underdrains and dissipater blocks, refurbish the primary spillway by lowering each of the four weirs, replace new drain valves, install new trash rack, raise the crest of the dam, and fine grade, seed, and mat all disturbed areas after construction activities have been completed. Provide the owner with a topographic survey of all new reconstructed areas, maintain reservoir water elevation until "approval to impound" is acquired from the scdhec, and finally remove all equipment and materials from the project site.

City of Dover

Work consist of repairs to boat ramp, add rip rap to earth embankment on upstream slope and downstream of the downstream apron, repair undermined sidewalk, repairing spalls, cracks, pop outs, scaling and delamination in concrete wingwalls, repairs to fence extensions and railings, investigating source of leaking water and condition of concrete wingwall to determine appropriate repair, repairing leaks and welds on the fish ladder, repairs to pedestrian walkway and repair opening between trash rack panels on the outlet works.

Evergreen Metropolitan District

Diverting bear creek and dewatering the work area in accordance with applicable permit requirements. Lockout/tagout of the upstream outlet works gate and accessing the downstream outlet works vault. Excavating the existing channel bottom downstream of the outlet works to expose the existing concrete outfall. Draining and demolishing existing steel pipe, valves, and fittings inside the outlet works vault.