Chambers Creek Floodwater Retarding Structure Site No. 106 Structural Repair

Federal funding has been authorized for the remedial repair of Chambers Creek Floodwater Retarding Structure Site No. 106. Structure Site No. 106 is a single-purpose earthen, flood prevention dam originally designed in 1958, construction drawings approved in 1972, built in 1975, and repaired in 1991. Site 106 has experienced two large slope failures on the downstream slope and a fence out of alignment as the result of the slides. The repair consists of excavating and removing material behind all slide areas; flattening the upstream and downstream slopes to 2.75:1 with lime treated materials and reconstructing the downstream crossing berm. Barbed wire fences needing to be removed for the construction will be removed and replaced around the structure. The major items of work consist of: preparing the access road and campsite, removing fences from the work area, stripping and stockpiling the topsoil from the embankment and lime processing area, excavating the embankment slopes, backfilling the embankment slopes with lime-treated earthfill, placing topsoil 1-foot thick normal to the slopes over the lime-treated earthfill, and vegetating all disturbed areas. The lime will be added to and mixed with the earthfill material in the designated processing area. The approximate repair quantities consist of: 14,328 cubic yards of excavation; 672 tons of lime; 11,627 cubic yards of lime-treated earthfill; 23,379 square yards of topsoil; 1425 feet of sediment fence, 2,124 linear feet of barbed wire fence; and 6.3 acres of vegetation. Estimated Price Range: $800,000 - $1,100,000 Performance Time to be allowed for completion of contract is 143 calendar days. (Holidays and weather days not included.) The work must be completed in accordance with the specifications and drawings. The deadline to ask questions is 6/11/2020 5:00 PM CST

Division 03 -	Concrete, Precast Concrete.
Division 33 -	Utilities, Storm Drainage Utilities, Storm Utility Drainage Piping, Storm Utility Water Drains, Storm Drainage Structures.