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The City hereby adopts the thresholds, definitions, and minimum requirements, found in Appendix 1 of the Western Washington Phase II Municipal Stormwater Permit, including the mandatory provisions of the 2019 SWMMWW. Refer to the Redmond Stormwater Technical Notebook for local modifications and application of the definitions, thresholds, and minimum requirements in Redmond. Redmond Zoning Code 21.17.010.E details requirements to plan for stormwater management.

The Director may require additional controls or modified minimum requirements for specific projects or areas based on approved interlocal agreements, approved Department Operational Policies, identified capacity limitations, significant erosion potential, or seasonal factors. The Minimum Requirements, as further described in the Redmond Stormwater Technical Notebook, are:

A. Repealed by Ord. 2860.

B. Repealed by Ord. 2860.

C. Minimum Requirement 1 – Preparation of Stormwater Site Plans.

D. Minimum Requirement 2 – Construction Stormwater Pollution Prevention Plan.

E. Minimum Requirement 3 – Source Control of Pollution.

F. Minimum Requirement 4 – Preservation of Natural Drainage Systems and Outfalls.

G. Minimum Requirement 5 – On-site Stormwater Management.

H. Minimum Requirement 6 – Runoff Treatment.

I. Minimum Requirement 7 – Flow Control.

J. Minimum Requirement 8 – Wetlands Protection.

K. Minimum Requirement 9 – Operations and Maintenance. (Ord. 3081 § 2, 2022; Ord. 2860 § 3 (part), 2016: Ord. 2596 § 2 (part), 2011; Ord. 2532 § 2 (part), 2010: Ord. 2218 § 1, 2004).