Centennial Creek Project

ongoing

Construction of the State Route 46 Corridor Improvement Project has impacted wetlands and other waters in the Union, Whitley 2A, Whitley 2B, and future Cholame section. The Centennial Creek Mitigation Project intends to improve hydrology and function of the creek by removing and/or replacing undersized culverts, removing hardscaping and debris, and engineering roughened riffles (shallow portions of the creek with large rocks placed to form natural habitat) at intervals along the system to encourage aggradation and reestablishment of a riffle/pool system. The total area proposed for mitigation is approximately 4.14 acres, which includes 0.53 acres of wetlands creation and enhancement, as well as 3.61 acres of other waters creation, enhancement, and reestablishment. A plant establishment period will be for 3 years, followed by a monitoring period of 7 years, for a total of 10 years after planting to successfully meet agency success criteria.