News - Anderson County, SC Closes Gates to Restore Normal Pool at Broadway Lake

NC APWA

July 2017 – Due to dam safety concerns resulting from severe erosion and structural degradation in the outlet area of Broadway Lake Dam, the primary outlet system was removed from service in 2016 as the lake was lowered while repairs were made. JEWELL Engineering was hired by prime consultant Woolpert, Inc. to work for Anderson County as dam engineer on this project to demolish a former failing outlet system and replace it with an extended outlet barrel to discharge normal flows into a new plunge pool beyond the dam embankment toe. JEWELL’s involvement in this project began in 2015 when we performed an inspection of the failing outlet structure which was experiencing serious undermining and structural degradation. We investigated the possibility of restoring the structure and ended up recommending that it would be better to replace the outlet and extend the turbulent discharge to a point where it could be safely managed in a new plunge pool.

Following design and permitting work, construction started in February of 2017 with project completion in May. In addition to extending the outlet and installing a new plunge pool, other areas of the dam were repaired to address surface erosion problems. A sizeable spring encountered in the plunge pool area was handled by allowing it to discharge unhindered in the plunge pool.

The lake level control gates were closed in May and with plentiful rains in May and June, the lake level returned to normal pool in June 2017, much to the relief of local residents and County Staff. The restored dam will provide reliable service to Anderson County for many years to come.