Porch Herald

Granada Hills edition

Weekly brief

Granada Hills water projects: routes, schedules and public comments

The Hayvenhurst proposal and approved Granada Trunk Line replacement cover different streets and follow separate schedules.

Reviewed November 9, 2026.

Two Los Angeles Department of Water and Power projects cover different parts of Granada Hills: Hayvenhurst runs south toward Devonshire Street; the Granada Trunk Line replacement follows Rinaldi Street west toward Porter Ranch.

Hayvenhurst: a proposed route under environmental review

The Hayvenhurst Trunk Line Replacement Unit 1 would replace about three miles of pipe. It is one of six priority projects in LADWP’s proposed citywide trunk-line program.

The proposed route runs along these stretches:

  • Rinaldi Street between Hayvenhurst Avenue and the connection near Swinton Avenue to the Van Norman Complex.
  • Hayvenhurst Avenue from Rinaldi Street south to Chatsworth Street, crossing the 118 freeway.
  • Chatsworth Street from Hayvenhurst Avenue west to Balboa Boulevard.
  • Balboa Boulevard from Chatsworth Street south to just past Devonshire Street.
  • Open LADWP’s Hayvenhurst route map (PDF, printed page 16)

Hayvenhurst timing and street access

LADWP places the six priority projects within a ten-year planning window. That window does not specify when crews would reach a particular block.

The Initial Study anticipates trench construction along most of the route, with tunneling at several crossings. It calls for local access generally to remain open and allows temporary removal of curb parking beside work zones. Driveway arrangements and any water shutoffs need project-specific notices.

Granada Trunk Line: approved replacement along Rinaldi Street

LADWP approved the separate Granada Trunk Line replacement on Oct. 13, 2026. It covers about five miles between Balboa Boulevard and the De Soto Reservoir Regulator Station, through Granada Hills and Porter Ranch.

The May 2026 environmental study estimates the following construction periods:

  • Unit 1: Rinaldi Street from Balboa Boulevard to Yolanda Avenue; July 2028 through July 2036.
  • Unit 2: Rinaldi Street from Yolanda Avenue to the De Soto Reservoir Regulator Station, east of De Soto Avenue; September 2030 through March 2038.
  • Open the Granada route maps (PDF, printed pages 6–7)

What the Granada schedule means for nearby streets

Those dates describe each unit’s overall construction period, not a continuous closure of every block. The study describes crews moving along the route and trenchless work at major intersections. It plans to keep the existing pipe in service while the new one is built.

Residents and businesses along Rinaldi Street can use the project’s LADWP contact for questions about later construction notices, access and scheduling. The December comment deadline below applies to the citywide program that includes Hayvenhurst, not the approved Granada project.

Comment on the program that includes Hayvenhurst

Comments on what the environmental review should study are due Dec. 11, 2026. Residents along the route can raise access, parking, traffic or construction-noise concerns. Online meetings are Nov. 17 at 11 a.m. and Dec. 1 at 6 p.m., Pacific time. LADWP says submitted names, addresses and comments can become public records.

Sources