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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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Zone 3 - Lopez Water Project

Meeting Calendar - View Agendas and Minutes


Lopez Dam Safety Information

Haga clic aquí para obtener Información de Seguridad de la Presa Lopez en Español

The Lopez Dam Flooding and Evacuation Brochure provides a simplified map showing areas that would be flooded in the unlikely event of a dam failure and provides tips on how to prepare yourself and family for an emergency.

The Department of Safety of Dams inspects Lopez Dam and the Terminal Reservoir Dam annually for any safety issues, if any items are noted on the inspection they are then corrected by the San Luis Obispo County Flood Control and Water Conservation District who owns and operates the dam. As an example, in 2002 Lopez Dam underwent a seismic retrofit project to meet current seismic standards.

The Oroville Dam spillway disaster in northern California that began in February of 2017 called attention to the need for all dams to have updated inundation maps and emergency action plans, not just for dam failures but spillway failures as well.  The State Legislature passed SB92 that went into effect on July 1, 2017 and added new sections to the Water Code requiring owners of all state jurisdictional dams, except low hazard dams, to prepare inundation maps.

The below documents are the results of the updated inundation studies and corresponding detailed mapping for both the Lopez Dam and Terminal Reservoir Dam.

Lopez Dam Failure Inundation Mapping and Study

Lopez Terminal Reservoir Dam Failure Inundation Mapping and Study

For questions or comments regarding Zone 3 please contact Public Works via email or call 781-5252 and ask for the Utilities Division Zone 3 coordinator.

Lopez Water Project Habitat Conservation Plan (HCP)

Reservoir Water Data


The Zone 3 Advisory Committee is comprised of one representative from each water contractor, one representative from agriculture, and one member at large appointed by the Board of Supervisors. Please see the bylaws for other details of member qualifications and member terms.




Zone 3 Secretary

Jill Ogren


Arroyo Grande 

Kristin Barneich

Caren Ray Russom

Grover Beach

Karen Bright

Desire Lance

Pismo Beach

Marcia Guthrie

Erik Howell

Oceano CSD

Shirley D. Gibson

Cynthia Replogle

CSA 12

Brad Hagemann

John King

Agriculture Member

Brian Talley

Vard Ikeda

At Large Member

Jim Garing


Contact Public Works via web form, email, or call us at (805) 781-5252.