Z--Altus East B and Lugert Dikes Foundation Modifications, Altus Dam, W.C. Austin

Foundation modifications on the Altus East B and Lugert Dikes. The dikes are located approximately 20 miles north of Altus, Oklahoma in Kiowa County. The work be performed includes the following: 1) Cut off existing piezometers and protect during construction; 2) Reestablish piezometers following construction of the cement-bentonite slurry cut-off wall; 3) Grade gravel surfacing on crest of dikes to be used as a work pad; 4) Excavate rockfill off downstream face of dikes and place as a berm at the toe of the dike; 5) Excavate cutoff wall trench through embankment and soil foundation materials into shale bedrock.; 6) Continuously fill cutoff wall trench with cement-bentonite slurry to support excavation and to cure into a cutoff for foundation seepage; 7) Place spoils from excavation of cutoff trench on downstream face of dikes to be held in place by rockfill stockpile; 8) Remove upper 6 inches of cutoff wall, place and compact impervious material over cutoff wall; 9) Shape and contour hardened cutoff wall excavation spoils up the face of dikes; 10) Place stockpiled rockfill over cutoff wall excavation spoils on downstream face of dikes; 11) Regrade existing gravel surface as a base for the new gravel surfacing at the crest of the dikes and contaminated portions of access roads; 12) Place new gravel surfacing at locations where it was regraded.

Division 35 -

Waterway and Marine Construction, Common Work Results for Waterway and Marine Construction, Waterway and Marine Construction and Equipment, Marine Construction and Equipment.