Erosion Control Permit and Information

Lake Oswego is committed to protecting the environment of the city and the surrounding area through its Stormwater Management Utility. In an effort to further protect our water sources, Erosion Control Permits are required for construction projects under any of the following circumstances:

• Any construction that exceeds 500 square feet of land disturbance.
• Any commercial landscaping which exceeds 500 square feet of land disturbance.
• Any construction activity within 50 feet of a water body.
• Any single family landscaping that requires the installation or removal of more than 50 cubic yards of fill, or installation of a major site feature (i.e., swimming pool, parking pad, patio, etc.).

Lake Oswego has adopted the Clackamas Water Environment Services’ "Erosion Prevention and Sediment Control Planning and Design Manual" as the standard reference for erosion control best management practices (BMP's).  View the manual at the link attached.

Even when an erosion control permit is not required, property owners and other responsible parties need to ensure that soils, sediments, and other materials do not leave the job site and enter the surface water management system or nearby lakes, streams, or other waterways.  This is especially important when soil disturbing activities are occurring within 50 feet of a natural resource area or waterway.

If you are not sure whether your project will require an Erosion Control Permit, please e-mail Jamie Roberts, Erosion Control Specialist, or call 503.697.6511.   You may also consult Lake Oswego City Code 52.02.040 for further details.