* Pipeline maintenance to begin May 21
* Algonquin system major supplier of gas in New England
* New England's power grid says summer supplies adequate
NEW YORK, May 9 Spectra Energy's
Algonquin Gas Transmission unit on Thursday said planned
maintenance starting May 21 on its 24-inch mainline natural gas
system in New England could cause some restrictions.
"As part of its pipeline integrity project, Algonquin will
be conducting pigging operations from the Burrillville station
to the end of the line. During the in-line tool run, Algonquin
will coordinate with downstream point operators to minimize
operational impact," a website posting said.
The notice added that if further detailed investigations
were necessary, capacities through the station could be limited
to, in a worst case scenario, 449,000 dekatherms a day.
Capacity to several meters in Massachusetts could also be
restricted, the posting added.
The work is slated to end on June 9.
Additional pigging work on its 24-inch J-1 line from Needham
to Waltham is slated for June 1-20. Capacity to several meters
on that segment could also be restricted during the work.
Other maintenance for later in the year was also posted on
the company's website.
The 1,120-mile Algonquin system transports 2.44 billion
cubic feet per day of gas throughout New England with direct
connections to five major interstate pipelines and Distrigas'
Everett, Massachusetts liquefied natural gas terminal.
Prices on the Algonquin system, while not tracked daily by
Reuters, are typically some of the highest in the nation as
posted by ICE. In the peak winter demand period, prices climbed
to $14 per million British thermal units, more than $10 above
where cash gas at the nation's benchmark Henry Hub
traded this winter.
The New England power grid said recently it expects to have
enough electric supply to meet peak demand this summer but said
it would "keep an eye" on other factors that could have an
impact on grid operations like natural gas pipeline maintenance.
New England is dependent on natural gas for electricity
production. Last year natural-gas-fired plants produced 52
percent of the power generated in the region.