The Nacimiento Water Project Pipeline Central is the central portion of the
transmission line that will deliver raw water from Lake Nacimiento to the
Project’s participants. Its alignment commences just south of Paso Robles at the
Paso Robles Turnout on Santa Ysabel Road, continues south through Templeton and
the east side of Atascadero and ends at the Rocky Canyon Tank and Pump Station
in south Atascadero on Rocky Canyon Road. The Pipeline Central consists of five
main parts:Pipeline. Approximately 11 miles of 24-inch to 18-inch
diameter ductile iron pipeline will be installed as the central portion of the
Project’s pipeline. Pipeline work includes trenching, pipeline installation, and
backfilling; sheeting, shoring and bracing; performance of trenchless
construction at road and highway crossings; application of pipeline linings and
coatings; installation of appurtenances and corrosion monitoring stations;
pavement restoration; traffic and pedestrian control; protection and location of
existing utilities; hazardous materials removal and disposal; and site
restoration.
Turnouts. Three turnouts will be constructed to deliver
water from the Project’s main pipeline to to the City of Paso Robles, Templeton
Community Services District (TCSD), and Atascadero Mutual Water Company (AMWC).
The Paso Robles Turnout is located just south of Paso Robles on Santa Ysabel
Road and consists of approximately 3,100-feet of 24-inch diameter ductile iron
and welded steel pipeline with one horizontal directional drilling (HDD) river
crossing. The TCSD Turnout is located in Templeton off of Templeton Road and
consists of approximately 3,950-feet of 8-inch diameter ductile iron and welded
steel pipeline with one HDD river crossing. The AMWC Turnout is located just
northeast of Atascadero off of Templeton Road and consists of approximately
2,300-feet of 18-inch diameter ductile iron and welded steel pipeline with one
HDD river crossing. Each turnout also consists of turnout facility construction,
including installation of flow meters, isolation valves, flow control valves,
and electrical and instrumentation and control systems.
Horizontal Directional Drilling (HDD). Four HDD river
crossings will be performed beneath the Salinas River: one located at the Paso
Robles Turnout, having an approximate length of 1,930-feet and an approximate
depth of 94-feet; one located just south of Santa Ysabel Road, having an
approximate length of 3,000-feet and an approximate depth of 167-feet; one
located at the TCSD Turnout, having an approximate length of 860-feet and an
approximate depth of 45-feet; and one located at the AMWC Turnout, having an
approximate length of 1,060-feet and an approximate depth of 52-feet.
Fiber Optic Cable. A fiber optic communication line will
be installed along the entire pipeline alignment for the purposes of Project
operations and control. Work will include installation of pull boxes and
installation and testing of fiber optic conduit and cable.
Templeton Road Realignment. An
approximate half-mile stretch of the northern portion of Templeton Road will be
realigned to improve traffic safety. This work includes demolition, grading,
paving, and utility relocation.
