Trail Alerts

For updates on work at the Harry Tracy Water Treatment Plant, please visit www.sfwater.org/Peninsula

Thursday, April 10, 2014

Sawyer Camp Trail Partial Closure: April 21 through 25

The northern section of Sawyer Camp Trail will be closed from Monday, April 21 through Friday, April 25 for seasonal maintenance by San Mateo County Parks.

The trail will be closed from Hillcrest Avenue in Millbrae to just north of the Jepson Laurel area (a 2.5 mile section).

The southern trailhead at Skyline Blvd. and Crystal Springs Road will remain open, with no through-access to Hillcrest.

This work is necessary for fire prevention and general trail safety. Additional closures for maintenance and repairs are likely this spring and summer. For automatic updates, please subscribe to this blog by entering your email address into the box on the right-hand side of this page.

Trail updates are also posted on Twitter: @sawyercamptrail.

Tuesday, March 11, 2014

Sawyer Camp Trail Open

The entire 6-mile Sawyer Camp Trail is now open.

San Mateo County Parks recently completed seasonal fire prevention and maintenance work. No closures are currently planned, but additional closures for maintenance are likely this spring.

Please subscribe (see right) or Follow us on Twitter: @sawyercamptrail for upates.

Thursday, February 27, 2014

Important Update: Sawyer Camp Trail Partial Closure

The southern trailhead at Skyline Blvd. and Crystal Springs Road is now closed from the south gate to the Jepson Laurel picnic area. It will reopen for weekend visitors at 6 a.m. Saturday, March 1 and remain open all weekend.

Next week from Monday, March 3rd through Friday, March 7th, this same 3.5 mile section of Sawyer Camp Trail will close again. Park Rangers are removing hazardous foliage to prevent fires during the upcoming dry season.

The northern section of the trail is now open and is expected to remain open next week. The northern section may be accessed from the trailhead located at Hillcrest Blvd. in Millbrae. The Jepson Laurel picnic site is a 2.5 mile walk south from Hillcrest.

Additional trail closures for maintenance work are likely this spring. Please subscribe (see right) for automatic email updates or Follow us on Twitter: @sawyercamptrail.

Tuesday, February 25, 2014

Sawyer Camp Trail Partial Closures for Hazardous Tree Removal

The southern section of Sawyer Camp Trail is closed now through Friday, February 28th for emergency tree removal by San Mateo County Park Rangers and Calfire. The trail is closed at Crystal Springs Road and Skyline up to the Jepson Laurel picnic area.

The northern section at Hillcrest Blvd. is now open, but there is no through access to Skyline.

Tree removal is scheduled for the northern section next week. From March 3rd through March 7th, Sawyer Camp Trail will be closed at Hillcrest Blvd., with the southern trailhead open to the 3.5 mile marker.

The entire trail will be open Saturday and Sunday.

Friday, January 31, 2014

Temporary Trail Closure

On Tuesday, February 4th, the southern section of Sawyer Camp Trail will be closed from the trailhead at Crystal Springs Rd., north 3 miles to just before the Jepson Laurel. The trail will be closed all day for maintenance. The northern trailhead at Hillcrest Blvd. will remain open.

No further closures are scheduled at this time.



Questions?
Please call us at (866) 973-1476, 24 hours a day, 7 days a week.

Friday, January 17, 2014

Trail Closure & Opening!

Temporary Trail Closure
On Tuesday, Jan. 21st, the northern section of Sawyer Camp Trail will be closed from the Hillcrest Drive entrance, south 2.5 miles to just before the Jepson Laurel. The trail will be closed all day for Water System-related maintenance. The southern trailhead at Crystal Springs Road will remain open.

Trail Re-opening
San Andreas Trail's southern section, between Hillcrest Dr. and Larkspur Dr., has been repaired and is now open! It is gravel-surfaced, so cyclists must detour via the bike route along Skyline Drive. This section connects Sawyer Camp Trail to San Andreas Trail.

San Andreas Trail, Hillcrest trailhead

Questions? 
Please call us at (866) 973-1476, 24 hours a day, 7 days a week.

Thursday, December 12, 2013

What’s Going On Next to the Highway 92 Crossing?

Alexis Pope, the sole female diver on the project, 
rigs a water pump for washing out the culvert. 
The divers work on the barge 
as well as underwater.
If you cross the Crystal Springs Reservoir on Highway 92, you’ll pass a construction barge yet no construction is visible. The real action is 60 feet underwater, where divers with the Water System Improvement Program work on a seismic upgrade of the Upper Crystal Springs Dam lower culvert. The culvert has been weakened by past earthquakes where it crosses the San Andreas Fault.
To strengthen and provide flexibility to the 370’ long tunnel, the contractor has placed a 42” wide high density polyethylene pipe (HDPE) inside the 60” wide brick lined tunnel in a process called “sliplining”. Flexible grout and slurry delivered by a materials barge are pumped in-between the old pipe and new slipline to provide additional cushioning against future earthquakes. 
In addition, a vertical portal will be installed outside the area where the culvert crosses the fault as a fail-safe. It will maintain water flow from Upper Crystal Springs to the Lower Crystal Springs Reservoir if a major seismic event damages the lower culvert where it is bisected by the fault. 
Divers wear video cameras, communication lines and lights
on their helmets, and a warm water hose for comfort,
all connected to the barge via lengthy cables. 
Project Schedule
Dredging for vertical portal: December 2013
Expected completion: February 2014
This project, together with all of the other improvements to the regional distribution system, will allow the SFPUC to meet its goal of delivering potable water within 24 hours after a major earthquake.
A crane and temporary buildings are staged 
on the barge to support underwater construction work.
Photos by Robin Scheswohl, SFPUC




For more information on construction diving in the Crystal Springs - San Andreas Reservoir system, please see our article from April 2013.