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COVID-19 Updates: Get the latest public information related to coronavirus disease 2019 (COVID-19) at

Public Works will re-open our front counter to the public on July 6 and start providing some modified services.  Our hours will be 8 – 5, with closure from 12 – 1:30 for sanitation. Masks are mandatory in our building, and we ask that you adhere to physical distancing protocol. We will have limited services at our front counter and will not be accepting drop in meetings.  Please contact 805-781-5252 to make an appointment with staff.  Bus passes can be purchased at the Kiosk on the corner of Osos and Palm or by phone via Follow us on Twitter @SLOCountyPWD for the latest updates.

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Public Works

County of San Luis Obispo

Drainage Studies

These reports were prepared under the direction of the County of San Luis Obispo Public Works Department.

Cambria Drainage Study 2004

Cayucos Drainage Study 2004

Los Osos Drainage Study 1997

Nipomo Drainage Study 2004

Oceano Drainage Study 2004

San Miguel Drainage Study 2003

Santa Margarita Drainage Study 2004


Proposed Drainage Studies

These documents are not yet received and filed with the Board of Supervisors

Proposed Templeton Drainage Study

Toad Creek Watershed Report - This report is an attachment to the Proposed Templeton Drainage Study above.


Guide to Implementing Flood Control Projects

The primary focus of the Guide to Implementing Flood Control Projects is to identify several of the most significant constraints affecting the ability to implement flood control projects and to propose methods and strategies to address the challenges.

Guide to SLO Flood Management Report 2008

Guide to SLO Flood Management Appendix 2008



Drainage Studies