Monday, June 29, 2009

Tunnel Boring Machine to arrive at South Shaft in early July!


A tunnel boring machine and a crane will arrive at the South Shaft in early to mid-July. The tunnel boring machine will be assembled and stored on site and will be used this fall to bore the tunnel.


Tunnel boring machines are used to excavate tunnels through soil and rock. They can bore through hard rock, sand and almost anything in between.


The additional crane will also remain onsite as needed through construction.


Controlled Blast Scheduled for June 30th or July 1st

Controlled blasting is scheduled to occur at the South Shaft on either Tuesday, June 30th or Wednesday morning, July 1st, depending on conditions.

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.

The contractor will observe our national holiday on Friday, July 3rd.

Tuesday, June 23, 2009

Controlled Blast Scheduled for June 24th or 25th

Controlled blasting will continue at the South Shaft on either Wednesday afternoon, June 24th or Thursday morning, June 25th, depending on site conditions.

All indicators for vibration, noise and air particulates 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.

Thursday, June 18, 2009

Join us for Coffee at Starbucks on June 24th at 9am!

Please join us for coffee and casual discussion on Wednesday, June 24th, 2009 from 9am to 10am at the Starbucks Coffee in Crystal Springs Village, located at 100 De Anza Blvd, #111, San Mateo.

Chat with the project team, ask questions and learn more about this project.

Wednesday, June 17, 2009

Controlled Blast Scheduled for Friday, June 19th

Controlled blasting will continue at the South Shaft on Friday, June 19th. Depending on conditions and need, a blast may also take place at the North Shaft.

All indicators for vibration, noise and air particulates 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, June 12, 2009

Controlled Blasting Schedule for Week of June 14th

Controlled blasting will continue at the South Shaft on Monday, June 15th. Depending on conditions, a blast may also take place at the North Shaft. Additional blasts may take place through the week. Watch this blog for updates.

All indicators for vibration, noise and air particulates 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.

10 MPH Speed Limit for Cars and Bikes on Crystal Springs at Polhemus

This is a friendly reminder that there is a 10 mile per hour speed limit for cars and bikes near the intersection of Crystal Springs Road and Polhemus Road at the North Shaft site. This is for the safety of everyone. It is a small speed limit zone and we ask everyone to use caution in the area and follow the speed limit.

Thank you!

Wednesday, June 10, 2009

Controlled Blast Scheduled for North Shaft on Thursday, June 11

Controlled blasting is scheduled for Thursday, June 11th at the North Shaft, located on Crystal Springs Road near the intersection of Polhemus Road. 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. All indicators for vibration, noise and air particulates are below the thresholds and are measured constantly.

New Photos of Controlled Blasting and Muck Processing

Controlled detonations at the North and South Shaft continue in June. The South Shaft has reached approximately 65 feet, the North Shaft 35 feet. Here are some recent photos!

Photo 1 - Crews lowering the blast cover on top of the South Shaft in preparation for a controlled detonation.

















Photo 2 - a controlled detonation. All indicators for vibration, noise and air particulates are below the thresholds and are measured constantly.

















Photo 3 - After the detonation, rock and earth (called muck) are removed from the shaft using the crane.









Monday, June 8, 2009

Controlled Blasting to Continue at South Shaft

Controlled blasting of rock will continue at the South Shaft during the week of June 8th, 2009. We will keep you updated on the blasting schedule via this blog.

Controlled Blasting Begins June 9th at North Shaft

Contractor Shank/Balfour Beatty will begin controlled blasting of rock at the North Shaft, located on Crystal Springs Road near the intersection of Polhemus Road.

Controlled blasting will begin as early as Tuesday, June 9th and will continue for several days each week until the contractor reaches necessary depth.

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. Neighbors may notice some noise and/or vibration during the controlled blasting.

If you would like to receive regular EMAIL or PHONE notifications of when controlled blasting will take place, please send an email to newcstunnel@sfwater.org or call 650-212-0165 and provide your email, phone, name and address by June 22nd. Blast schedules will also be posted on our Community Blog.