Temporary Erosion and Sediment Control Manual
The Temporary Erosion and Sediment Control Manual (TESCM) replaces Chapter 6 and Appendix 6A of the Washington State Department of Transportation (WSDOT) Highway Runoff Manual. It outlines WSDOT’s policies for meeting the National Pollutant Discharge Elimination System (NPDES) Construction Stormwater General Permit requirements and the requirements in Volume II of the stormwater management manuals published by the Washington State Department of Ecology.
The TESCM is intended for use during the design, permitting, and construction phases of transportation construction projects. It covers:
- TESC plan design and implementation
- TESC BMP application and installation
- SPCC plans
- Discharge sampling and reporting
- Site management and documentation
- Compliance-related issues
Slow down – lives are on the line.
In 2022, speeding continued to be a top reason for work zone crashes.
Even one life lost is too many.
Each year about 670 people are killed nationally in highway work zones. In 2022, Washington had six fatal work zone crashes on state roads.
It's in EVERYONE’S best interest.
95% of people hurt in work zones are drivers, their passengers or passing pedestrians, not just our road crews.