NYC 9/11 Public Portal Document
O
Department of Environmental
Protection
Executive Offices
59-17 Junction Boulevard-19th floor
Corona, New York 11368-5107
www.nyc.gov/dep
Joel A. Miele Sr., P.E., Commissioner
(718) 595-6565 Fax #: (718) 595-3525
E-mail: [email protected]
MEMORANDUM
o ~c~~oti~ D
To: Mayor Rudolph W. Giuliani
IQi
UU
DEC 1 12000
From: Commissioner Joel A. Miele Sr., P.E. DEPUTY MAYOR OPERATIONS
Re: Bi-weekly Report - November 24 to December 8, 2000
Date: December 11, 2000
Emerging Issues
Delaware Aqueduct - Shaft 6 Valve Repair
During the reporting period, DEP undertook repair of a leaking gate valve at Shaft 6 on the Delaware
Tunnel)
Agueduct. Shaft 6 is the dewatenng shaft for the Rondout to West Branch Tunnel (the
portion of the Delaware Aqueduct. Repair of the leaking gate valve was the first step in allowing
to
the City to investigate and repair the leak in the Tunnel. Shutdown of the Tunnel was necessary
complete the repair. The shutdown began on November 28 and took two full days. Dive preparation
~, took another day and the first dive to begin the repair began mid-day Friday. A total of seven dives
encountered
1 were made to complete the repair. During the course of the repair, minor problems were
s hut 1°*P4 (primarily with the dive team's equipment) which put the entire job about 24 hours behind schedule.
planning, so none of the delays jeopardized
f6r However, DEP had anticipated such delays in its project
EO ° , r the project or the City's ability to supply water. Refilling of the Tunnel began 10 AM Tuesday and
rei it is now back in service, running at near full capacity (919 million gallons) this morning with no
leaks in the valve.
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NYC-WTC 000137936
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