DDECM Online Open House
We invite you to review the proposed changes to the Thurston County Drainage Design and Erosion Control Manual. Comments will be accepted through October 29, 2021.
1. View the video presentation.
2. Read the changes summary documents below.
3. Review the 2021 changes in a Word document track changes format below
DDECM Environmental Impact Review-Determination of Nonsignificance-Comments Open until November 8, 2021
Thurston County Public Works has completed the Environmental Impact Review for the 2022 DDECM update and determined it to have no significant impact on the environment.
DDECM Environmental Impact Review-Determination of Nonsignificance:
2022 Drainage Manual Update
We’re updating the DDECM per Department of Ecology requirements. The updated version will become effective on June 30, 2022.
In addition to incorporating minor staff- and industry-requested changes, nine significant changes were included in this update:
2021 changes in a Word document track changes format: