Monday, August 31, 2009

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!

Friday, August 28, 2009

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.

Tuesday, August 25, 2009

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.

Friday, August 21, 2009

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.

Tuesday, August 18, 2009

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.

Monday, August 17, 2009

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.

Friday, August 14, 2009

A Look Inside the Shaft





Left: The drill is lowered down into the shaft and on right, worker loads the drilling holes prior to blasting.

Friday blast around noon; end of double blasts

Tail tunnel excavation is complete, and that means that two blasts a day are no longer necessary. Today's blast will occur around noon, similar to Thursday.

All indicators for vibration, noise and air quality are below the thresholds and continue to be measured constantly. Late today, check out photos from inside the tunnel.

Wednesday, August 12, 2009

Neighbor Helps Get the Job Done



This morning, Gene Ciranni, on right, a neighbor from Ascension Drive, helped Jim Mulkey, one of the contractor's superintendent's and a licensed blaster, set off the second underground blast around 10:30 am. On Thursday, there will be only one blast, and it is scheduled between 11 and 11:30 am.

Tuesday, August 11, 2009

Controlled Blast Tuesday around 9 am, Two Wed.

I just learned that there will be one blast today and two tomorrow. You can expect sound pressure around 9 am or within 30 or 40 minutes of that time. The contractor is planning two more for tomorrow, but I do not have the times confirmed. Also, one on Thursday and another on Friday.

Friday, August 7, 2009

Controlled Blasts for Week of 8/10

For the week of August 10, blasts are currently scheduled for Monday morning as early as 8 am and on Tuesday the contractor intends to perform two blasts. We will post additional information as the contractor refines his upcoming schedule for the north and south shaft areas.

All indicators for vibration, noise and air quality are below the thresholds and are measured constantly. We were pleased to hear that Thursday's blast was less disruptive for neighbors. The Construction Manager noted that atmospheric conditions were different yesterday and cloud cover and wind (or lack of both) have a big impact on perception of sound pressure at a distance that translates into the shaking that neighbors feel.

The contractor intends to perform controlled blasting once or twice a day between 7am and 6pm Monday through Friday through the week of August 17. 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.

As you may know, Amy Sinclair is on vacation through August 21. I will be coordinating directly with you through that time. Maureen

Tuesday, August 4, 2009

Controlled Blast Schedule Update - Week of August 3rd

A blast is scheduled for Wednesday, 8/5 between 12 and 1pm. Additional blasts may take place on Thursday. Blasting is not planned for Friday. Multiple blasts per day may continue into next week as needed - usually one in the morning and one late afternoon.

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.