357 North Main Street
Memphis, TN 38103

Studies & Permitting


As part of the City of Memphis’ Sewer Assessment and Rehabilitation Program (SARP10), Tioga was tasked by the project engineer to provide environmental services, including delineation and permitting of impacts to jurisdictional waters and a habitat assessment for endangered bat species, in support of a new 11,000 linear foot diversion gravity sewer line along N. Watkins St. in north Memphis, Shelby County, Tennessee.  The line is being installed as a diversionary system connecting existing trunk lines on either side of the Loosahatchie River to allow for repair and rehabilitation of downstream lines in the area.

Loos Sewer

Tioga’s natural resource scientists coordinated with the US Fish and Wildlife Service (USFWS) to establish potentially listed species in the area and performed an onsite delineation of the project corridor, marking the extent of jurisdictional streams, wetlands, and State of Tennessee wet weather conveyances and noting potential critical habitat.  All work was performed per USFWS, US Army Corps of Engineers (USACE) and State of Tennessee Department of Environment and Conservation (TDEC) regulations and guidance.

Tioga provided both a complete delineation of all waters of the U.S. and State of Tennessee detailing the onsite streams and wetlands and a Summer Habitat Assessment for the northern long-eared and Indiana bats.   The reports were subsequently submitted to the regulatory agencies for review and concurrence.

Tioga coordinated with the USFWS for approval of the project via mitigation by avoidance for several high-quality potential bat roosts within the project corridor, and based on proposed impacts, prepared permit application documents for submittal to USACE and TDEC.  As part of the permit process with USACE, Tioga coordinated a Phase I Archeological Survey of the corridor. 

The original contract scope included the coordination of a National Environmental Policy Act review by Tioga.  However, federal funding was not utilized and that task was removed from Tioga’s scope of work.  The project is ongoing and a second alignment has been assessed for wetlands and permitting impacts.  Tioga has also provided Erosion Prevention & Sediment Control Plans and a Storm Water Pollution Prevention Plan for both proposed routes.