Erosion and Sediment Control

Erosion is a natural process, but construction activities such as removing vegetation, disturbing soil, and redirecting drainage can increase the natural rates of erosion. Sediment is the single most common pollutant in rivers, streams, lakes, and reservoirs. Sediments can also damage stormwater facilities such as catch basins, drywells, and swales - increasing the risk of flooding and resulting in costly maintenance for taxpayers.

The purpose of Spokane County’s Erosion and Sediment Control ordinance is to control soil erosion and sedimentation through the use of temporary and permanent erosion and sediment control practices.

The ordinance lists four performance standards to keep in mind during land-disturbing activities:

  1. Protection of public roads and stormwater facilities
  2. Proper washout of concrete trucks and equipment
  3. Protection of private properties
  4. Protection of water bodies and wetlands

The Stormwater Management Manual for Eastern Washington contains an exhaustive list of best management practices (BMPs) that can be used to make sure construction projects meet the standards listed above.

Here are some of the most commonly used BMP’s, including instructions for inspections and maintenance: