The highway will be fully closed from 11:59 p.m. Aug. 28 to 8 a.m. Aug. 29
TOPANGA – Caltrans announces a full closure of Topanga Canyon Boulevard/State Route 27 (SR-27) between State Route 1/Pacific Coast Highway (PCH) to Grand View Drive from 11:59 p.m. Friday, Aug. 28, to 8 a.m. Saturday, Aug. 29, to continue installation of a reinforced concrete pipe underneath the highway.
Additionally, between 9 p.m. and 11:59 p.m. Friday, Aug. 29, SR-27 will be reduced to one lane for use by both directions of traffic, with flaggers directing alternating traffic, for about 0.5 miles near mile marker 2.5.
During this time, crews will reconfigure the traffic pattern in the recovery work zone, which allows them to continue installing the drainage culvert perpendicular to the roadway with minimal impacts to traffic.
North of the closure, SR-27 between Grand View Drive to U.S. 101 will remain open.
Alternate routes
- Southbound SR-27: Take U.S. 101 to Southbound Interstate 405, then Westbound Interstate 10 to northbound PCH.
- Northbound SR-27: Take southbound SR-1 to eastbound I-10, then northbound I-405 to westbound U.S. 101.
The 84-inch reinforced concrete pipe is designed to carry storm water, increased mud and debris flow during rainstorms, reducing risk of debris overflow on highway and trigger embankment failure in future storms. The total cost for the pipe installation project is about $2.75 million.
This work is the last major piece of ongoing recovery efforts on SR-27 from the Palisades Fire and winter storms. Pipe installation work is expected to be completed by fall 2026, with most recovery work on SR-27 wrapping up by the end of 2026.