ARC Energy Trust announces October 15, 2008 cash distribution amount

Sep 8, 2008

CALGARY, Sept. 8 /CNW/ - (AET.UN and ARX - TSX) ARC Energy Trust (the
"Trust") announces that the cash distribution to be paid on October 15, 2008,
in respect of the September 2008 production, for unitholders of record on
September 30, 2008, will be $0.24 per trust unit. The ex-distribution date is
September 26, 2008. This represents a $0.04 per unit decrease from the
August 15 distribution and the upcoming September 15th distribution.
On May 7 and June 26 of this year the Trust increased distributions in
the context of rising commodity prices. Since June 26th, oil prices have
declined by approximately 22 per cent while natural gas prices have fallen
45 per cent. In light of the commodity price decline, the Board has determined
that ARC's distribution to be paid on October 15th and thereafter will be
$0.24 per unit, consisting of a base distribution of $0.20 plus a $0.04 per
unit top-up, such distribution levels will continue to be reviewed on an
ongoing basis in the context of commodity prices and other factors.
As at October 15, 2008 the Trust's trailing twelve-month cash
distributions, including the October 15, 2008 payment, total $2.68 per trust
unit.

ARC Energy Trust is one of Canada's largest conventional oil and gas
royalty trusts with an enterprise value of approximately $6.5 billion. The
Trust expects full year 2008 oil and gas production to average approximately
64,000 to 65,000 barrels of oil equivalent per day from six core areas in
western Canada. The Trust's 2008 capital expenditure program remains
unchanged, including the ongoing development of its Montney assets. ARC Energy
Trust units trade on the TSX under the symbol AET.UN and ARC Resources
exchangeable shares trade under the symbol ARX.

Note: Barrels of oil equivalent (boe) may be misleading, particularly if
used in isolation. In accordance with NI 51-101, a boe conversion ratio for
natural gas of 6 mcf:1 bbl has been used, which is based on an energy
equivalency conversion method primarily applicable at the burner tip and does
not represent a value equivalency at the wellhead.

ADVISORY - In the interests of providing ARC unitholders and potential
investors with information regarding ARC, including management's assessment of
ARC's future plans and operations, certain information contained in this
document are forward-looking statements within the meaning of the "safe
harbour" provisions of the United States Private Securities Litigation Reform
Act of 1995 and the Ontario Securities Commission. Forward-looking statements
in this document include, but are not limited to, ARC's internal projections,
expectations or beliefs concerning future operating results, and various
components thereof; the production and growth potential of its various assets,
estimated total production and production growth for 2008 and beyond; the
sources, deployment and allocation of expected capital in 2008; and the
success of future development drilling prospects. Readers are cautioned not to
place undue reliance on forward-looking statements, as there can be no
assurance that the plans, intentions or expectations upon which they are based
will occur. By their nature, forward-looking statements involve numerous
assumptions, known and unknown risks and uncertainties, both general and
specific, that contribute to the possibility that the predictions, forecasts,
projections and other forward-looking statements will not occur, which may
cause ARC's actual performance and financial results in future periods to
differ materially from any estimates or projections of future performance or
results expressed or implied by such forward-looking statements.

<<
ARC RESOURCES LTD.

John P. Dielwart,
President and Chief Executive Officer
>>

For further information: about ARC Energy Trust, please visit our website www.arcenergytrust.com or contact: Investor Relations, E-mail: ir@arcresources.com, Telephone: (403) 503-8600, Fax: (403) 509-6417, Toll Free 1-888-272-4900, ARC Resources Ltd., Suite 2100, 440 - 2nd Avenue S.W., Calgary, AB, T2P 5E9