East Fork Raw Water Supply Project Environmental Services, North Texas Municipal Water District

In addition to design services, Plummer performed the environmental resources studies and Section 404 permitting for the East Fork Raw Water Supply Project components involving impacts to jurisdictional waters of the United States including the diversion pump station, constructed wetland, pipeline, and Lavon Lake outfall. Plummer completed the field investigations associated with the Preliminary Jurisdictional Determination, prepared surveys for potential impacts to threatened and endangered species, and performed environmental assessments for impacts to federal lands operated by the United States Army Corps of Engineers (USACE) at Lavon Lake. The project was on a tight timeline and coordination of the 404 permitting process with the USACE was critical to enable project construction to proceed. Coordination with the USACE Operations Division also enabled all compensatory mitigation for the impacts along the pipeline route at the numerous stream and river crossings to be conducted on the USACE property. The mitigation plan included restoration of bottomland hardwood forest, enhancement of native prairie, and development of shoreline emergent marsh. Continuing services include coordination of the mitigation plan implementation, monitoring for compliance with permit conditions and mitigation plan, and annual reporting to the USACE.