Ftr Engineering

Erosion Control Permit

An Erosion Control Permit is required if changes to improved or unimproved real property cause, will cause, or are likely to cause a temporary or permanent increase in the rate of soil erosion from the site, as described in Clean Water Services Design and Construction Standards Section 2.03.4, Erosion Control Permits (PDF). An erosion control permit may be a stand-alone permit or it may be needed in conjunction with other permits.

As described in Tualatin’s Public Works Construction Code, Section 102.1.4, there are four general categories of Erosion Control Permits issued by the City:

  • Single-Family Residential
    • Disturbing under 1,000 SF
    • Disturbing 1,000 SF or greater
  • Non-Residential
    • Disturbing under 1,000 SF
    • Disturbing under 1-acre
  • 1200-CN (Disturbing between 1- and 5-acres)
  • 1200-C (Disturbing 5-acres and greater)
Apply Online

For Erosion Control Permit inquiries, send us an email.

For any Erosion Control inspection requests, please contact Clean Water Services at 503-681-4444.

Wet Weather Erosion Control

Wet weather measures must be established by October 1 and remain effective through the following May 31

In accordance with the City’s agreement with Clean Water Services, the City of Tualatin would like to remind contractors of the importance of installing and maintaining Wet Weather Erosion Prevention Measures on all development sites in Tualatin. 

Measures include:

  • All exposed soil must have ground cover protection measures in place by October 1. Grass seed application either by hand or mechanical hydro-seeding will not provide adequate ground cover protection unless maximum germination is reached by October 1. If seeding is unsuccessful, additional ground cover measures such as straw, yard debris compost, or erosion control blankets must be installed.
  • All erosion control facilities and techniques contained in the approved erosion control plan for your site need to be checked and maintained regularly. If the facilities and techniques in the plan are not effective, additional measures must be implemented. Information regarding maintenance can be found in the Clean Water Services Design and Construction Standards, Chapter 6, Section 6.02.6.
  • Information regarding approved measures and installation procedures is contained in the Erosion Prevention and Sediment Control Planning and Design Manual (PDF).

Downloads

Standard Detail No. 5 – Single Family Erosion & Sediment Control PDF

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