Sonoma Mountain Stormwater Management and Rainwater Storage


SCH Number
Lead Agency
Sonoma Resource Conservation District
Document Title
Sonoma Mountain Stormwater Management and Rainwater Storage
Document Type
NOE - Notice of Exemption
Project Applicant
Sonoma Resource Conservation District

Document Description
This project would reduce stormwater runoff to Washington Creek, a tributary to the Petaluma River in southern Sonoma County. The project site is an equine facility where current peak flows leaving the property have caused significant erosion along the channels of Washington Creek. The project includes the construction of rainwater storage tanks (200,000 gallon capacity) that would be filled from the roofs of several large structures around the property including barns and horse arenas. These structures already have gutters and downspouts in place that can be used to tie into the rainwater storage system, and the tanks have been sized based on projected runoff from these structures. The project will also restore native plants on the property, with vegetated swales designed to slow, spread, and sink stormwater that is not captured in the tanks. Plants will be irrigated and established using water stored in the tanks.

Contact Information
Erica Mikesh
Sonoma Resource Conservation District
1221 Farmers Lane, Suite F
Santa Rosa, CA 95405

Phone : (707) 569-1448 ext. 108


Other Location Info
490 Sonoma Mountain Road

Notice of Exemption

Exempt Status
Categorical Exemption
Type, Section or Code
Class 3 - §15303
Reasons for Exemption
Project includes construction of two 100,000 gallon tanks that will be filled by rainwater coming off of existing buildings. Associated fill lines and water lines serving the tank are included in construction. This project will be funded by a resource conservation grant.


Notice of Exemption
2020070202_Sonoma Mountain Stormwater   PDF 694 K

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