Roadway Standards Section 470 - Erosion And Sedimentation Control

Erosion and sedimentation control measures are required for construction areas where the ground surface will be disturbed by clearing, grading, fills, excavations, and other construction activities. Erosion and sediment controls shall conform to WES standards and their Erosion Prevention and Sediment Control Planning and Design Manual. Engineering will require an erosion and sediment control plan for projects that disturb between 800 square feet and one acre when located in the unincorporated area and outside a stormwater district. A permit is required for this work. 

For areas outside a surface water management district, NPDES 1200-C permits are required for projects that disturb an acre or more and are issued by the Department of Environmental Quality (DEQ). An applicant will be required to provide evidence of an approved 1200-C permit upon request.