Valve Lot Improvements begin in South San Francisco and Daly City

Construction work on various upgrades and improvements at the Baden Valve Lot in South San Francisco, and the San Pedro Valve Lot in Daly City has started. This work is critical to provide local residents with reliable drinking water.

Construction Duration

South San Francisco:
Monday to Friday: 8:00 am-5:00 pm.
Duration: May 2009 – Spring 2011

Daly City:
Monday to Friday: 7:30 am -5:00 pm
Duration: May 2009 – Winter 2009

Construction noise can be expected during these times, but is not anticipated to exceed local noise ordinances. Noise monitoring will be performed throughout construction. On occasion, minor traffic impacts during equipment deliveries can be expected. No parking impacts are anticipated. We will notify neighborhoods and businesses individually for any major construction activities.

Controlled Blasting Comes to an End!!

Great news! The contractor completed a controlled blast today, August 31st and no other blasts are currently scheduled!

We will alert everyone if the contractor needs to blast again in the future but at this time, no controlled blasts are scheduled.

Thank you to all neighbors for your patience during the controlled blasting. We know you've heard and felt them and we appreciate your support and patience through this difficult part of the project.

We are planning a public event at the South Shaft site in September so everyone can see the Tunnel Boring Machine. More details soon!

Controlled Blasts Nearing Completion!

We hope to end controlled blasting very, very soon, with one more blast scheduled for Monday, August 31st at approximately 10am, depending on conditions at the site.

All indicators for vibration, noise and air quality are below the thresholds and are measured constantly.Controlled blasting can take place between 7am and 6pm Monday through Friday.

All safety and noise control measures are in effect and the work is performed in accordance with California Occupational Safety and Health (OSHA) and environmental regulations.

Controlled Blast Schedule for August 26-28

The contractor has scheduled controlled blasts at the South Shaft on Wednesday - Friday, August 26-28th. Each blast is scheduled for approximately 10am, depending on conditions at the site. We will provide an update if dates change.

All indicators for vibration, noise and air quality are below the thresholds and are measured constantly.Controlled blasting can take place between 7am and 6pm Monday through Friday.

All safety and noise control measures are in effect and the work is performed in accordance with California Occupational Safety and Health (OSHA) and environmental regulations.

Controlled Blasts Drawing to a Close

Contractor reports that there are ten or fewer controlled blasts left on the starter tunnel at the south shaft. That means we can expect some blasting nearly every day for the next two weeks. But if all goes well, that would be the end of it. This would certainly be ahead of our previously announced schedule of mid-September to end the blasting activity. We'll post approximate times for next week's blasts as soon as they are confirmed.

Blast Schedule for Remainder of Week

Controlled blasts are scheduled for Wednesday at 11:00 am, Thursday at 9:00 am, and Friday at 10:00 am. We will provide you with updates if conditions in the field dictate any changes to the schedule.

The anticipated finish time for the controlled blasts is about one month or less with 4-5 shots per week. The starter tunnel is now 80 feet long. Final length will be approximately 100 feet.

The contractor continues to perform within the thresholds for noise, vibration and air quality standards. Measurements are conducted daily.

Dust Mitigation
The project contractor has implemented additional mitigation measures in response to dust complaints from neighbors.

No Blast scheduled for Tuesday

Just a reminder that the contractor has no shaft detonations scheduled for Tuesday, August 18. I will post the schedule for Wednesday through Friday, as soon as it is confirmed.