Hydroelectric Fish Passage
For more than 100 years, migratory fish were unable to swim beyond a diversion dam on the Broad River. South Carolina Electric & Gas contracted Thalle to build a vertical slot fish ladder to allow American Shad and other migratory fish to swim upstream of the dam and return to the ocean.
The fish ladder is a concrete structure with a series of pools similar to a staircase that allow fish to bypass the diversion dam. The project required cofferdam construction to protect the worksite and extensive concrete construction.