Polybutylene Service and Valve Replacements

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Northwood Parkway Tract

Residents affected will be in the Northwood Parkway Tract neighborhood in Thousand Oaks
The scope of work includes replacing existing water infrastructure that has been identified that needs replacement. Elements of the work include replacing existing water distribution valves, saddles, water meter boxes, polybutylene water services with copper tubing and installation of cathodic protection, replacement of ¾” copper service line, traffic control, and all appurtenant work to complete the project.

A construction contract has been awarded to J. Vega Engineering, Inc. from Camarillo, CA in the amount of $1,555,500.
The Project was funded in the Adopted FY 2023-24 Water Fund Capital Budget

Polybutylene was the standard material used for water service lines installed in the 1970’s. However, due to frequent leakage/breakage caused by the old age and the nature of the material used, these Polybutylene service lines are being replaced with new copper lines in an ongoing citywide program.
These valves are over 35 years old, most cannot be opened and closed fully, and in some cases are not operable at all. Replacement of the valves allows the mainline shutdowns required maintenance for residential service lines.

CI 5646:5648 Vicinty Map

CI 5646:5648 Location Map

Streets will have partial lane closures, and some will have full road closures accessible to residents only and non-residents in the area will be detoured to their destinations.
Water shutdown from 9:00 a.m. to 4:00 p.m. will occur multiple days in these locations due to these replacements.
No Parking Signs will be posted 72 hrs. in advance of the work
Residents will be notified 24 hours prior to any shutdown

Roner del Castillo, Project Manager

(805) 449-2396

Conejo Oaks Tract (Mountclef Blvd. & Moorpark Rd.)

Residents affected will be in the areas of Conejo Oaks tract and north of Avenida de los Arboles between Mountclef Blvd. and Moorpark Road in Thousand Oaks
The work includes complete replacement of existing valves, saddles, water meters boxes, polybutylene water services with copper tubing and installation of cathodic protections, replacement of ¾” copper service line, traffic control, and all appurtenant work to complete the project.

Project was completed on August 19, 2022
Construction contract was awarded to J. Vega Engineering, Inc. from Camarillo, CA in the amount of $1,857,781
The Project was funded in the Adopted FY 2021-22 Water Fund Capital Budget

Polybutylene was the standard material used for water service lines installed in the 1970’s. However, due to frequent leakage/breakage caused by the old age and the nature of the material used, these Polybutylene service lines are being replaced with new copper lines in an ongoing citywide program.
These valves are over 35 years old, most cannot be opened and closed fully, and in some cases are not operable at all. Replacement of the valves allows the mainline shutdowns required maintenance for residential service lines.
The City acquired the water system at the Conejo Oaks track from California-American Water Company in 2006. In the Conejo Oaks tract area, cast iron saddles, installed in 1959, connect the water service laterals to the main lines. These saddles are prone to corrosion issues that cause frequent failures of the connections and high potential failure due to vibrations during paving construction.

Roner del Castillo
Project Manager
rdelcastillo@toaks.org
805-449-2396

Andrew Semenza
Construction Inspector
asemenza@toaks.org
805-795-0331

Shamir Shahamiri
CIP Division Manager
sshahamiri@toaks.org
805-449-2452