Preserving Charleston Harbor’s Water Quality

Preserving Charleston Harbor’s Water Quality

There are heightened storm water concerns and regulations around development sites within Charleston Harbor and this site is particularly challenging. High soil contamination makes nitrogen a major concern for governing agencies as well as total suspended solids (TSS), phosphorus, and heavy metal removals. Beyond the regulations, storm water system(s) would have to address shallow groundwater elevations and adjust to accommodate high flow rates at a shallow depth. Per city storm water regulations, outfall could not go below a certain elevation. A storm water system would have to accommodate shallow flows across the development.

The collection of challenges is difficult to address, but finding a system that could successfully work with the shallow height was essential. Beyond that, engineers also had to design within a small footprint, keep costs down, and source systems that have proven treatment and records of requiring minimal maintenance.

Lead Designer Brittany Bowers, and Engineer of Record Tony Woody of Thomas & Hutton in Mt. Pleasant, S.C., worked closely with a Bio Clean engineering team to fit each design with simple solutions.