Monday, October 31, 2011

Landscaping Work to Begin Soon at New Crystal Springs Bypass Tunnel South Shaft in San Mateo

In the next few weeks, crews will return to the South Shaft site of the New Crystal Springs Bypass Tunnel project near Polhemus Road in San Mateo to begin adding a native seedmix to the meadow.

The process, called hydroseeding, involves spraying a mixture of seeds, water and nutrients onto an area of dirt. In some cases, the mixture may be a bright green or blue color.

Watch this blog for more details and a timeframe for the process.

Thursday, October 27, 2011

Sawyer Camp Trail 2-day Closure -- November 2nd and 3rd

Sawyer Camp Trail will be closed for two days on November 2nd and 3rd (Wednesday and Thursday).

During the closure, our project team will deliver additional rock to our new access road segments, and continue seismic upgrades on our Crystal Springs/San Andreas Pipeline. Water in this pipeline has been “turned off” for the months of October and November to facilitate this work.

Notice the unusual green color on some slopes along the trail? This is a temporary, first step of re-vegetation. This bright green soil stabilizer will turn brown and blend in with the surrounding landscape as it dries. During next year’s dry season, we’ll be re-planting native plants in these locations.

One more thing of interest to trail users: the Lower Crystal Springs Dam concrete pours will continue through mid-November. The biggest day will be on Tuesday, November 1st when approximately 65 trucks will deliver cement using Skyline Blvd., Crystal Springs Road and Polhemus Road. Much smaller pours (just a few trucks) are expected on October 28th (Friday) and October 31st (Monday).

Construction of a larger stilling basin, Lower Crystal Springs Dam.


Please do not hesitate to call with your questions or concerns, 24 hours a day (866) 973-1476.

Tuesday, October 25, 2011

Sawyer Camp Trail Open

The entire Sawyer Camp Trail is now open! You will see some construction vehicles driving on the trail daily for the next several weeks. The largest truck is expected to be a water truck, necessary to control dust at the pipeline work locations next to the trail.
                                                                    
Additional short trail closures are expected this fall. Please subscribe to http://sawyercamptrail.blogspot.com/ to get automatic email updates!

Neighbors have asked us about the night work currently taking place on Highway 280 above the Lower Crystal Springs Dam. This is a Caltrans project to improve drainage on the freeway. Caltrans expects the work to be completed by November 15th, prior to the official start of the rainy season.

Please call us 24 hours a day with any questions or concerns at (866) 973-1476.

Monday, October 24, 2011

South San Francisco Patch: Work Continues to Enlarge Crystal Springs Reservoir Capacity



Posted via South San Francisco Patch http://bit.ly/mTvmUf

October 24, 2011

by Dave Colby

On a day that many in the Bay Area felt a magnitude 3.9 temblor, work continued last Thursday to re-pipe, rebuild, and earthquake-proof the infrastructure of the Crystal Springs Reservoir.

Crystal Springs serves primarily as a backup water source for the northern portion of San Mateo County and for the City of San Francisco. In a typical year, 15 percent of its water is used by residents; 85 percent is left in storage. The water held in the reservoir comes from the Hetch Hetchy valley near Yosemite, and from local watersheds.

The work that began in early April has a two-fold purpose. The first is to protect this primary source of backup water that would be needed in case any of the unsteady faults in the Bay Area rupture enough to create a crippling earthquake.

Piplines that would ultimately take the emergency water from the reservoir to our taps are old.

"Some of our pipelines and other facilities are aging and need to be addressed," says Maureen Barry, communications manager for the San Francisco Public Utilities Commission. "Many of them were built early in the 20th century and have reached the end of their useful life."

Ironically, the reservoir lays virtually on top of the notorious San Andreas fault.

The second purpose is to add nine feet of height to the dam in Lower Crystal Springs. Doing so will restore the capacity of the reservoir to its “historic levels”, enabling the capture of more summer Sierra runoff in years of abundant snowpack, and conversely, helping to better cope with anticipated drought conditions in dry years.

The San Francisco Public Utilities Commission, which manages Crystal Springs, has employed contractors on the $320 million project through the summer, work that in some cases will continue until 2013.

"Some of these facilities we haven't been able to take out and maintain because we have such a demand for water," says Barry. "Redundancy is now being built in so we can do a better job when something breaks down and still deliver water."

The project work on Crystal Springs is being built to withstand an earthquake of magnitude 7.8, the largest ever recorded on the San Andreas fault.

For hikers, Sawyer Camp Trail - adjacent to the reservoir - has been closed several times during the summer because of the project. Barry says there may be more trail closures coming, as work crews hustle to beat the rainy season.

Friday, October 21, 2011

Busy Day -- Work Near Sawyer Camp Trail on Monday, October 24th

On Monday, October 24th Sawyer Camp Trail will be closed from the Hillcrest Gate to the 5 mile marker. This northern-most one mile section of trail will close all day for routine water system maintenance. You will be able to enter the trail at the southern trailhead (Skyline and Crystal Springs Road) and enjoy the first five miles of trail, but there will be no through access at Hillcrest.

The southern portion of the trail will be open Monday, but hikers may see something unexpected: A Hydroseed Truck on the trail! The truck will be applying “Earth Guard” onto the slopes near the trail to prevent erosion. Earth Guard is an environmentally friendly soil stabilizer, and the work is monitored by wildlife biologists. This must be done in advance of the winter storms, but does not require the trail to be closed.

The next big concrete pour for the Lower Crystal Springs Dam stilling basin will take place this Monday, October 24th. 90 trucks will deliver cement to the area between 6 a.m. and 8 p.m. using Polhemus and Crystal Springs Road. A smaller pour is scheduled for Tuesday, October 25th with about 20 to 45 cement deliveries starting at 6 a.m. Construction on the Lower Crystal Springs Dam stilling basin, spillway and parapet wall is expected to finish on schedule by November 15th!

Please contact us 24-hours a day with any questions or concerns at (866) 973-1476.

Map of work near Sawyer Camp Trail in 2011 and 2012. Click to enlarge.
Map of work near Sawyer Camp Trail in 2011 and 2012. Click to enlarge.

Tuesday, October 18, 2011

Peninsula Watershed Update

v   Reminder: Sawyer Camp Trail is closed for two days on October 19th and 20th (Wednesday and Thursday). The entire trail will be closed for two days - to reopen at sunrise on Friday, October 21st.

v  On Monday, October 24th Sawyer Camp Trail will be closed from the Hillcrest Gate to the 5 mile marker. This northern-most one mile section of trail will close all day for routine water system maintenance. You will be able to enter the trail at the southern trailhead (Skyline and Crystal Springs Road) and enjoy the first five miles of trail, but there will be no through access at Hillcrest.

v  Work continues on the Lower Crystal Springs Dam stilling basin. The next big concrete pour will take place this Monday, October 24th: 90 trucks will deliver cement to the area between 6 a.m. and 8 p.m. using Polhemus and Crystal Springs Road. A smaller pour is scheduled for Tuesday, October 25th with about 20 to 45 cement deliveries starting at 6 a.m. Construction on the Lower Crystal Springs Dam stilling basin, spillway and parapet wall is expected to finish on schedule by November 15th!

Please contact us 24-hours a day with any questions or concerns at (866) 973-1476!

Friday, October 14, 2011

Sawyer Camp Trail 2-day Closure: October 19th and 20th

TRAIL CLOSURE:
Sawyer Camp Trail will be closed for two days on October 19th and 20th (Wednesday and Thursday). The entire trail will be closed for two days - to reopen at sunrise on Friday, October 21st.

The closure (originally scheduled for earlier this month) is needed to prepare for the rainy season at construction sites near the trail. Also, 100 trucks will deliver rock to complete new access road segments that run along our water pipeline. These access roads will enable repairs and maintenance of the Crystal Springs/San Andreas Pipeline… without driving on Sawyer Camp Trail!

WEEKEND WORK:
Crews will be working this Saturday and Sunday at the Lower Crystal Springs Dam work site (near the southern trailhead to Sawyer Camp Trail) in order to complete work prior to winter storms. Work will also continue all weekend on the Crystal Springs/San Andreas Pipeline adjacent to Sawyer Camp Trail. The pipeline was recently emptied of water for a short window of time to allow for seismic upgrades and valve replacements. Small pick-up trucks and one water truck for dust control will need to drive on the trail both Saturday and Sunday at speeds no more than 5 mph.

POLHEMUS AND BUNKER HILL
All day Friday, October 14th our team will be removing soil from a staging area along Polhemus between Crystal Springs Road and Bunker Hill Drive. You may notice our flagger directing traffic on Polhemus. This work will break for the weekend, but may need to resume on Monday (October 17th).

Please contact us 24-hours a day with any questions or concerns at (866) 973-1476!

Monday, October 3, 2011

ASCE Honors New Crystal Springs Bypass Tunnel Project Team


The San Francisco Section of the American Society of Civil Engineers (ASCE) selected New Crystal Springs Bypass Tunnel for its Large Project of the Year award.

Located in San Mateo County near Polhemus Road, this project is at final completion.

Several members of the project team joined Julie Labonte, Director of the San Francisco Public Utilities Commission (SFPUC) Water System Improvement Program (WSIP), in celebrating the achievement at the San Francisco Section annual dinner in late September. Labonte accepted the award on behalf of Peninsula Regional Project Manager Husam Masri who was out of the country at the time.

One of the very first WSIP regional projects, the new 4,200 foot tunnel and pipeline in San Mateo County was completed ahead of schedule using less than 4% of its contingency funds. An Arup Brierley team assisted SFPUC’s engineering team led by Project Engineer Gilbert Tang with the design. Shank/Balfour Beatty excavated the tunnel using a 12-foot-diameter shielded disc-cutterhead tunnel boring machine. Jacobs Associates of San Francisco provided the construction management.

Labonte applauded the combined team’s excellent design and construction management within strict budget and schedule constraints while contending successfully with neighbors in close proximity and active creek habitats. “Only the best team work can produce such an exceptional performance,” said Labonte.

Here is a photo of the project team at the ASCE event in late September. Congratulations!