Friday, September 14, 2012

Second Avenue Subway blast work resumes

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Second Avenue Subway blast work resumes Metropolitan Transportation Authority

New York's Metropolitan Transportation Authority (MTA) said controlled blasting resumed on the Second Avenue Subway Friday, following an intensive investigation into the cause of an Aug. 21 incident below 72nd Street in Manhattan, and the implementation of additional safety measures.

Blasting is resuming first in the station cavern at 72nd Street, "and will begin the following week at the ancillary shaft where the August 21 incident occurred," MTA said.

"We have completed our review of the incident and have implemented a number of corrective actions. From this moment forward, blasting operations will be subject to additional management scrutiny and enhanced safety procedures to ensure that the community and workers are kept safe," said Michael Horodniceanu, president of MTA Capital Construction.

Improvements to safety include superintendent sign-off on a pre-blast checklist, a second licensed blaster to verify that each blast has been prepared in accordance with the approved blast plans, and a double layer of protective blast mats will be used when blasting in shafts. Additionally, a review of the steel decking system to ensure its ability to withstand uplift pressure has been completed and all personnel responsible for inspecting and monitoring blasting have been retrained.