Thomas & Hutton assisted with the implementation of several stormwater best management practices (BMPs) at locations throughout the Gills Creek Watershed. This impaired urban watershed was identified by the Environmental Protection Agency (EPA) and the Department of Justice (DOJ) as a location for Supplemental Environmental Projects (SEPs) relating to the City of Columbia/EPA Consent Decree associated with the City’s wastewater collection and treatment system.
The City of Columbia, working with the Gills Creek Watershed Association and other stakeholders, had preliminarily identified sites and potential BMPs for implementation to partially meet the requirements of the consent decree. Thomas & Hutton verified the applicability of the proposed BMP technology and project site and adjusted each as needed. Thomas & Hutton provided surveying, analysis and design calculations, construction plans preparation, permitting, and assistance during construction. The City of Columbia completed the projects using their own forces.
The projects included:
The projects were designed and constructed in a compressed 9-month schedule.