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San Luis Obispo County, California


General Project Information

Project Background

In 1959, San Luis Obispo County secured the rights to 17,500 acre-feet of water per year from Lake Nacimiento. Today, construction of the Nacimiento Water Project (Project), the single largest project that San Luis Obispo County has ever undertaken, has been completed.  The total cost of the project, including design, construction, environmental permitting, and right-of-way, was $176 million.


Intake Pipe with poppies Santa Ysabel Pump Station HDD SPEC 4

Project Description

This regional Project consists of a multi-port sloping intake facility at Lake Nacimiento with a pump station, two intermediate pump stations, three storage tanks, a control system, and approximately 45 miles of transmission pipeline ranging from 36- to 12-inches in diameter, with the ability to deliver 15,750 acre-feet of raw water each year to communities within San Luis Obispo County.

The $176.1-million Project is owned, managed and operated by the San Luis Obispo County Flood Control and Water Conservation District (District).  It is the District's largest project ever constructed by a factor of six, and serves as an icon of collaboration between communities within San Luis Obispo County.  The Participants in the Project are the City of Paso Robles, Templeton Community Services District, Atascadero Mutual Water Company, the City of San Luis Obispo, and Community Services Area 10, Benefit Zone A.

The Board of Supervisors took action to award Specs 01, 03, 04, 05 on August 28, 2007 and Spec 02 on September 11, 2007.  Notices to Proceed were issued on October 2007, allowing construction to begin.

The Project began operations on January 7, 2011.



























Spec Map Construction Contract Information


Spec 01 - Intake                                 

Spec 02 - Facilities                            

Spec 03 - Pipeline North              

Spec 04 - Pipeline Central     

Spec 05 - Pipeline South         





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