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City-Ordered Analysis Says Unsafe to Tunnel Under BHHS

An independent peer review of an MTA study of the safety of the proposed Weside Subway Exenstion disagrees with many of the findings.

City-Ordered Analysis Says Unsafe to Tunnel Under BHHS

An independent study of the proposed commissioned by City Council says that it is unsafe to tunnel under with students present.

Released Friday, the 70-page evaluation was conducted by engineering and scientific consulting firm Exponent at a cost of $75,000. It will be discussed at next week’s council study session on Feb. 7 at 2 p.m.

The report evaluates a safety assessment of the subway route by Parson Brinkerhoff that was conducted on behalf of the Metropolitan Transportation Authority. The Parson study found that routing the Westside Subway Extension under BHHS to Constellation Boulevard in Century City would be safe.

Exponent evaluated relevant geological, geotechnical, petrochemical and structural engineering hazards associated with the proposed subway construction, and found fault with the Parson study. It concluded that the Parson study employed a “simplistic” methodology of studies and that post-construction operational safety issues were never considered when stating that tunneling under BHHS would be safe.

An executive summary of the report can be found by clicking here, while the entire report can be found on the city website by clicking here.

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