Thursday, July 3, 2014

Wishing You a Happy Fourth of July

On behalf of the San Francisco Public Utilities Commission and the Bay Division Pipelines Nos. 3 & 4 (BDPL3&4) project team and construction crew, we want to wish you a Happy Fourth of July. Construction work will not take place over the holiday weekend.

As we celebrate our country's independence, our team is also celebrating another success. This week, the BDPL3&4 project garnered the top story in Engineering News-Record. The magazine highlights the cutting-edge slip joint installation to help the pipe compress, move, and even rotate without rupturing during a major earthquake. The goal is to ensure that the 2.6 million people relying on the Hetch Hetchy Regional Water System, which includes BDPL3&4, can receive potable drinking water within 24 hours of a major earthquake.

To read the article in its entirety, click here

The highly innovative slip joint on the cover of Engineering News-Record



Watch the installation of the one-of-a-kind seismic slip joint

Seismic Slip Joint

Friday, June 20, 2014

The WSIP Turns 10!


This year the Water System Improvement Program (WSIP) turns 10! One of the largest infrastructure projects in the nation, the WSIP is repairing, replacing and upgrading our aging water infrastructure to ensure we can deliver water to customers following an earthquake. We’ve gotten a little nostalgic about how far we’ve come in the last 10 years, and we would like to share this video with you.



Now 80 percent complete, the WSIP has already provided increased reliability to the water supply for customers as a result of the completion of some of the program’s major projects. The program has created over 6 million construction craft hours to date, employing more than 11,000 workers since 2007. Nearly half of those workers live in our four-county service area.

Wednesday, May 7, 2014

Construction Notice: Excavation and Testing near Paseo Padre Pkwy

Construction activities will re-commence in the area between Paseo Padre Parkway and Nugget Way on Monday, May 12. 

Crews will use machines to excavate near the pipeline shut-off station, run water tests and then connect the new earthquake-safe pipeline to the regional water system.

This work will take place between 7 a.m. and 7 p.m., Mondays through Fridays, and 9 a.m. to 6 p.m. on Saturdays. The work will not affect traffic.

Thursday, May 1, 2014

Milestone: the Seismic Slip Joint

In April, we installed a one-of-a-kind seismic slip joint. Watch the video here:

Monday, April 14, 2014

Construction Notice: Two-day on-ramp closure at Mission Blvd.

The westbound Mission Blvd. to northbound I-680 on-ramp in the Warm Springs neighborhood of Fremont will be closed between 10 p.m. on Wednesday night April 16 through 6 a.m. on Saturday morning, April 19 to install a large slip joint.

The slip joint to be installed is designed to absorb up to 6.5 feet
of movement during a major earthquake.

The red line shows the on-ramp subject to closure.
Detour Information 
To detour during this on-ramp closure, use Warm Springs Blvd. (North), and make a right at Auto Mall Parkway to merge onto the I-680 North.

Trucks should take the Warm Springs Blvd. detour or turn left at Durham Rd. to access I-680 before the Mill Creek bridge.

Monday, April 7, 2014

On-ramp Closure: Eastbound Mission Blvd. to Northbound I-680

This Thursday night 4/10 and Friday morning 4/11, the Eastbound Mission Blvd. to Northbound I-680 on-ramp in the Warm Springs neighborhood of Fremont will be closed between midnight and 5:00 a.m.

In order to complete essential elements of our regional water pipeline upgrade, it is necessary to close and slightly re-align this on-ramp. This will allow construction activities to continue alongside this busy commuter corridor without further impacting traffic.

Why a Night Time Closure? 
Closing the on-ramp late at night causes the least impact to commuters and local residents.
The pipelines we are upgrading are located directly under the I-680 freeway and the on/off-ramps of Mission Blvd. In order to access the pipeline, a phased traffic handling plan is being put in place. The SFPUC, Caltrans and other governmental agencies have worked together closely on this phased traffic approach plan to limit impacts to drivers and the surrounding community.

Detour Information 
To detour during this five-hour on-ramp closure, use Warm Springs Blvd. (North), and make a right at Auto Mall Parkway to merge onto the I-680 North.

Trucks should take the Warm Springs Blvd. detour or turn left at Durham Rd. to access I-680 before the Mill Creek bridge.

The red line shows on-ramp to be closed at midnight on Thursday night.
The on-ramp will re-open on Friday morning, April 11 at 5:00 a.m., shown in blue.

Tuesday, March 18, 2014

On the move: huge ball joints head for the fault line

A ball joint secured and ready for transport.

Next week, the first of two massive ball joints will be delivered from storage in Livermore to our construction site in Fremont, where it will be included in the Seismic Upgrade of Bay Division Pipelines Nos.  3&4.

The two identical joints were fabricated specifically for the project. The inner dimension of the ball joints measures 72 inches (6 feet) in diameter. The joint itself measures more than 8 feet in diameter at its widest point. The ball joints are the largest such joints to be used in the Hetch Hetchy Regional Water System, and at the time of fabrication were the largest ball joints in the world.

The joints are made of ductile iron and are part of a system designed to absorb up to 6.5 feet of horizontal displacement if a major earthquake were to take place on the Hayward Fault.

A depiction of the ball joint installed in the BDPL3&4 system (courtesy of URS Corp.)