Environmental Assessment / Alabama Coushatta Tribe

Livingston, Texas

Thornberry - FEMA Letter of Map Revision

Kullihoma Environmental Assessment / Chickasaw Nation

Ada, Oklahoma

This project consisted of 3.5 miles of roadway reconstruction on the Reservation Road System. The environmental assessment for this project was unique in the fact that the roads were located on the Alabama Coushatta Reservation and involved cultural and archeological issues and an endangered species. The roads had to be realigned to avoid unmarked grave sites, trees that were of cultural significance to the Tribe, and nesting trees for the endangered species, the Red Cockaded Woodpecker. The entire road project required an archeological and biological investigation.

This project involved completing a comprehensive floodplain study, hydraulic models, and topographical maps to apply for a FEMA Letter of Map Revision. Through Red Plains' efforts, the result was that FEMA revised the affected Flood Insurance Rate Map and issued a Letter of Map Revision.

This project was completed using the HEC-RAS river modeling program. Red Plains researched the hydraulic information that was used to establish the orginal floodplain identified on the FIRM map.

This project consisted of 5.0 miles of roadway reconstruction and surfacing on a county road. The environmental assessment involved the evaluation of this project that involved large cuts and fills and how it affected the adjacent land owners. This project also involved the investigation and mitigation of an endangered species, the American Burying Beetle.