RECOVERY--Y--ABSTRACT FOR THE CASTLE ROCK LEVEE SLURRY WALL

RECOVERY--The U.S. Army Corps of Engineers (USACE), Portland District (NWP) had a public bid opening related to the requirement for the installation of a slurry wall using a Cement Bentonite slurry to prevent seepage through the Castle Rock Levee. The work consists of earthwork (degrading the levee to a uniform crest); site work including removing existing light poles and concrete bases along with electrical pull boxes to be reused; construction of a seepage cutoff wall composed of wall panels along the alignment shown, using the Cement Bentonite (CB) slurry trench excavation method; levee embankment construction; installation of light pole bases, electrical pull boxes, and conduit (Optional); and placement of riprap. The Cement Bentonite Slurry wall shall be 1700 LF with a typical depth of 40 feet and a minimum width of 30.