Trail Alerts

For updates on work at the Harry Tracy Water Treatment Plant, please visit

Monday, November 28, 2011

Sawyer Camp Trail 3-Day Closure – November 30 to December 2

Sawyer Camp Trail will be closed this week on November 30, December 1 and December 2 (Wednesday through Friday).

The closure is necessary as construction crews continue seismic upgrades to our Crystal Springs/San Andreas water pipeline. Work also continues to prepare for winter rains and to complete new access road segments. The new access road segments will allow maintenance crews to reach the pipeline with minimal disturbance to recreational users of Sawyer Camp Trail.

Please call us 24 hours a day with any questions or concerns!

Friday, November 18, 2011

Underwater Construction Continues in the Peninsula Watershed

San Andreas Lake, the reservoir just west of the City of San Bruno, is the site of a large regional water improvement project, however construction work is taking place beneath the surface of the water. Demolition of a 1930’s-era water transmission tunnel is in progress 40 feet underwater!

Divers are razing this structure underwater, yet one would never know walking around the lake.  From the shore of San Andreas Lake, the only sound one can hear is the diver’s air compressor and support equipment. The tunnel will be replaced with a new underwater intake structure in 2012 that will send water from the reservoir to the Harry Tracy Water Treatment Plant for distribution to our taps.

In addition to the divers, hikers on San Andreas Trail may see boats and yellow booms in the water connected to this construction. The yellow booms are called silt curtains: underwater “curtains” that protect water quality and keep species out of the work zone.

PG&E is also doing major work this autumn near the San Andreas Trail – water testing the gas pipelines. The PG&E work is an unrelated project and is expected to wrap up by Thanksgiving in this location.

At the Lower Crystal Springs Reservoir work site, next to the southern trailhead to Sawyer Camp Trail, divers are working nearly 100 feet beneath the water’s surface. To work at that depth, seven divers are required for one day’s work.  Each diver may spend 45 minutes underwater before resurfacing. Currently, the team is installing supports for new valves.

Marine construction in both reservoirs continues through 2013 as part of the Crystal Springs/San Andreas Transmission System Upgrade project. Please call us 24 hours at (866) 973-1476 with any questions.

Friday, November 11, 2011

Sawyer Camp Trail 2-day Closure – November 16th and 17th

Sawyer Camp Trail will be closed for two days on November 16th and 17th (Wednesday and Thursday). The entire trail will close those two days, to reopen at sunrise on Friday morning.

During the closure, our project team will deliver additional rock to new access road segments and continue seismic upgrades on our Crystal Springs/San Andreas Pipeline. The closure is also necessary to prepare for winter storms at construction sites near the trail. 

Please contact us 24-hours a day with any questions or concerns!

Friday, November 4, 2011

Crystal Springs Reservoir Projects Update

Sawyer Camp Trail reopened today at sunrise after a 2-day closure. More short trail closures are likely this season…please stay tuned!

San Andreas Trail to the north remains open…but PG&E gas pipeline water-test work (including 50 blue “tanks” that hold discharged water) will continue adjacent to the northern-most tip of San Andreas Trail through November.

This weekend, work on the parapet wall and stilling basin of the Lower Crystal Springs Dam will continue all day Saturday and Sunday. Saturday, about 25 cement trucks will deliver concrete to the upper and lower dam areas from 6 a.m. to 2 p.m. The trucks will travel through the intersection of Crystal Springs Road and Skyline Blvd., so please use caution and expect some traffic delays near the southern trailhead to Sawyer Camp Trail.

Next week on November 7th (Monday) and November 10th (Thursday), the final large-scale concrete pours will take place at the Lower Crystal Springs Dam. Both days, 50 concrete trucks will arrive during the hours of 6 a.m. and 9 p.m. Truck traffic to the dam will continue until Thanksgiving, but at a much smaller volume.

Some construction vehicles will need to drive on Sawyer Camp Trail this Saturday, as work continues on our Crystal Springs/San Andreas Pipeline. This Sunday the trail will be construction-free! Please call us 24 hours a day with any concerns at (866) 973-1476.