Thalle Awarded $32M Herbert Hoover Dike Rehab 5 & 5A
August 30, 2013
The work includes demolition and removal of the existing Herbert Hoover Dike Culverts 5A and 5 and the construction of new water control structures S-281 and S-282 at the existing locations of culverts 5A and 5, respectively. The demolition and reconstruction efforts will require the installation of an earthen cofferdam within Lake Okeechobee and a steel sheet pile cofferdam at the landside of each culvert in order to dewater the construction sites. The S-281 and S-282 structures will include cast-in-place reinforced concrete foundations, headwalls, and culvert barrels (with steel liners). Combination flap/slide gates will be installed at the lakeside headwalls of each structure. S-281 will consist of three (3) 10-foot diameter culverts and S-282 will consists of three (3) 10-foot diameter culverts, each approximately 167 feet long. A cutoff wall will also be installed in the centerline of the embankment at both structures and the embankment reconstructed to match the existing crest elevation of the dike. Riprap will be installed along the lakeside embankment face and a control building will be installed at the landside work platform at each structure. Work also includes placement of surcharge fill, by-pass pumping, grassing and turbidity monitoring.