ATM was tasked by the Suwannee River Water Management District (SRWMD) and Columbia County, FL to develop flood abatement alternatives for the Clay Hole Creek-Cannon Creek-Price Creek and Alligator Lake watershed system. ATM constructed HEC-HMS and HEC-RAS models of the watershed system to simulate flooding conditions during the hurricanes of September 2004 (Frances and Jeanne). ATM used the models to develop and assess a number of alternatives for solving flooding problems in the area. ATM’s attention also focused on water quality improvements while solving the flooding problems. ATM proposed a control structure with a bleed-down device for Alligator Lake and proposed rerouting the flooded portions of Clay Hole Creek back into Alligator Lake for treatment. A pumped system including the identification and design of retention areas was also designed for the Eastwood Subdivision adjacent to Clay Hole Creek. Extra water quality volumes were also proposed in addition to the flooding improvements. The solutions developed focused on needed maintenance as well as capital improvements.
Following the procurement of grant funding, ATM is currently assisting Columbia County with the design and construction of a number of the proposed solutions.