POWER September 2011 - 34

TOP PLANTS
Astoria II Combined Cycle Plant,
Queens, New York
Owner/operator: Astoria Energy LLC
Managing construction of the 550-MW Astoria II Combined Cycle Plant in the
midst of Queens, a densely packed New York City borough, required extensive
off-site modular construction and a high level of logistical organization. Now
the new Astoria II plant is operating successfully in conjunction with the Astoria
Energy I plant as the largest natural gas-fired power plant in the Big Apple.
By Angela Neville, JD
Courtesy: SNC-Lavalin
Q
ueens, one of the five boroughs of
New York City, is a tightly woven
patchwork of diverse neighborhoods,
industrial sites, and waterfront properties.
When Astoria Energy LLC decided to move
forward with the Astoria Energy II Expansion
Project, the biggest challenge was carrying
out a massive, complex construction project
in the midst of one of the most densely populated
areas in the U.S.
The 550-MW (575 MW, nominal) facility
was constructed directly adjacent to the existing
550-MW Astoria Energy I Power Plant,
which was commissioned in 2006 (Figure
1). Construction activities on the new plant
could not interfere with operation of the existing
plant or with maintaining the security
requirements under the U.S. Coast Guard
MARSEC Plan, explained Bob Maso, site
manager of the Astoria II project.
The relatively small space where the
new power plant was to be built and the
34
lack of laydown area presented significant
challenges. As a result, several major
components-including the heat recovery
steam generators (HRSGs), the pipe racks,
and the air-cooled condenser-were assembled
off-site and barged in (Figure 1).
Keeping track of the power plants located
in Queens is made somewhat confusing
due to the fact that a number of them use the
word " Astoria " as part of their names. For
example, the original Astoria Power Plant
Units 1 through 5 were conventional steam
units that burn gas and oil. Those units, developed
by ConEd, are now owned by U.S.
Power Generating. In addition, there is another
project in the same geographical area
called NYPA Astoria Project, which uses
a variation of the same plant name, but it
was developed by the New York Power Authority
(see the August 2006 issue in our
archives at www.powermag.com for a Top
Plants story on that facility). Finally, the
www.powermag.com
two new Astoria Units I and II, which are
profiled in this article, are brand new gasfired
combined cycle plants located near
the original Astoria plants.
Permitting Hurdles
The $1.3 billion Astoria II project was governed
by an Article X Permit, which was granted by
the New York State Public Service Commission
to Astoria Energy LLC, the plant owner.
" This permit established strict guidelines
for minimizing the impact of the project on
the surrounding neighborhoods both during
construction and operation, " Maso said.
" These guidelines covered hours of operation,
noise limits, traffic to and from the
project, and environmental criteria. The environmental
rules required removal from the
site of all unused excavated material. "
The project was executed under a project
labor agreement negotiated with the
Greater New York City Building Trades
POWER | September 2011
http://www.powermag.com http://www.powermag.com

POWER September 2011

Table of Contents for the Digital Edition of POWER September 2011

Contents
POWER September 2011 - Cover1
POWER September 2011 - Cover2
POWER September 2011 - Contents
POWER September 2011 - 2
POWER September 2011 - 3
POWER September 2011 - 4
POWER September 2011 - 5
POWER September 2011 - 6
POWER September 2011 - 7
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