Baldwin Rapid Flow Mic Flocculation Sedimentation

While the plant maintained its ongoing operation at available full capacity, Kokosing finished approximately $30 million of work on time and within budget. Kokosing constructed four new flocculation basins, which were contained in a 110-foot-wide, 440-foot-long structure located 25 feet below grade. The basins, which house the flocculation equipment, feature “green” roofs of soil and grass atop concrete.

As part of the flocculation and sedimentation project, Kokosing rerouted the facility’s incoming raw water through two new rapid mixers into the flocculation basins. Flow in the existing 800-foot-long sedimentation basins was reversed by new influent and effluent walls inside the basins. Following flow into the sedimentation basins, the water returns to the original effluent-end of the basins by a Kokosing-constructed 800-foot-long, cast-in-place conduit, where the water runs over top the flocculation basin into the filter building. Kokosing also rehabilitated the plant’s influent and effluent gates and gate houses.