Construction Site Runoff Control Regulatory Requirements

The County must develop, implement, and enforce a program to reduce pollutants in stormwater runoff to its MS4 from construction activities, including private and public projects. This element of the SWMP requires that the County:

  • Develop and adopt an ordinance by February 16, 2010 that requires erosion and sediment controls during construction-phase work, including sanctions to ensure compliance.
  • Implement procedures by February 16, 2011 for site plan review, including review of Stormwater Pollution Prevention Plans (SWPPPs) prior to construction.
  • Implement procedures by February 16, 2011 for site inspection and enforcement of construction stormwater pollution control measures.
  • Provide adequate training for all permitting, planning, review, inspection, and enforcement staff.
  • Maintain records of activities related to site plan review, inspection, and enforcement.


City of Asotin County of Asotin City of Clarkston