Questar Pipeline and Enterprise Begin Operations of the White River Hub in Colorado

SALT LAKE CITY and HOUSTON (December 17, 2008) -- Questar Pipeline Company
(Questar), a subsidiary of Questar Corp. (NYSE: STR), and Enterprise Products Operating
LLC (Enterprise), an affiliate of Enterprise Products Partners L.P. (NYSE: EPD) announced
that service has begun on the White River Hub. Located in Rio Blanco County, Colo., the
White River Hub currently connects Enterprise’s natural-gas processing plant at Meeker with
four interstate natural gas pipelines: Rockies Express Pipeline LLC; Questar; Northwest
Pipeline GP (including the Williams Willow Creek processing plant, which is currently under
construction); and TransColorado Gas Transmission Company. Two more interstate
pipelines, the Wyoming Interstate Company and Colorado Interstate Gas systems, are
expected to be connected during the first quarter of 2009.
The White River Hub, a joint venture between Questar (the hub operator) and Enterprise, consists of four miles of existing 36-inch diameter pipe and about seven miles of
new, 30-inch diameter pipe, plus tie-in and metering facilities. The White River Hub provides
more than 2.5 billion cubic feet per day (Bcf/d) of firm and interruptible
transportation/wheeling service allowing producers, marketers and shippers to access
downstream markets for natural gas volumes produced in northwest Colorado’s Piceance
Basin. In addition to the existing interconnects, a new interconnect with Northwest Pipeline

GP’s Colorado Hub Connection pipeline is anticipated to be placed into service in the fourth
quarter of 2009.
"White River Hub provides Rockies producers with greater access to markets served
by pipelines in the Piceance and Uinta Basins,” said Allan Bradley, Questar Pipeline president
and CEO "We hope to further enhance market liquidity by working with the appropriate
parties to establish a new, published, regional pricing point designated 'White River Hub'."
Michael A. Creel, Enterprise’s president and CEO, said, “The White River Hub is
another example of our continuing strategy of expanding the partnership’s western franchise
of integrated assets in order to provide Piceance Basin producers with increased flexibility.
The expected completion of Enterprise’s Meeker II project later this month will complement
the new White River header system and further enhance our capabilities to provide shippers
with the midstream services they need to access the most attractive markets.”
For information on the project, contact Shelley Wright at Questar Pipeline (801)
324-2509 or Ron Fulcher at Enterprise (713) 381-7940.
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Questar Pipeline Company is a wholly-owned subsidiary of Questar Corp.
(NYSE:STR). Questar is a natural gas-focused energy company with an enterprise value of
about $6.6 billion. Questar finds, develops, produces, gathers, processes, transports, stores and
distributes natural gas. Visit Questar’s internet site at: www.questar.com.
Enterprise Products Partners L.P. is one of the largest publicly traded partnerships and
is a leading North American provider of midstream energy services to producers and
consumers of natural gas, NGLs, crude oil and petrochemicals. Enterprise transports natural
gas, NGLs, crude oil and petrochemical products through approximately 35,000 miles of
onshore and offshore pipelines. Services include natural gas gathering, processing,
transportation and storage; NGL fractionation (or separation), transportation, storage and

import and export terminaling; crude oil transportation; offshore production platform services;
and petrochemical transportation and services. For more information, visit Enterprise on the
web at www.epplp.com. Enterprise Products Partners L.P. is managed by its general partner,
Enterprise Products GP, LLC, which is wholly-owned by Enterprise GP Holdings L.P.
(NYSE: EPE). For more information on Enterprise GP Holdings L.P., visit its website at
www.enterprisegp.com.
Enterprise Products Partners L.P. Cautionary Statement Regarding Forward-looking Information
This news release includes forward-looking statements. Except for the historical information contained
herein, the matters discussed in this news release are forward-looking statements that involve certain risks and
uncertainties, such as the partnership’s expectations regarding the completion of its Meeker II project. These
risks and uncertainties include, among other things, weather-related events, insufficient cash from operations,
market conditions, governmental regulations and factors discussed in Enterprise Products Partners L.P.'s filings
with the Securities and Exchange Commission. If any of these risks or uncertainties materializes, or should
underlying assumptions prove incorrect, actual results or outcomes may vary materially from those expected.
The partnership disclaims any intention or obligation to update publicly or reverse such statements, whether as a
result of new information, future events or otherwise.
Contacts:
Questar:
Martin Craven, Investor Relations (801) 324-5077
Steve Chapman, Media Relations (801) 324-5548
Enterprise
Randy Burkhalter, Investor Relations (713) 381-6812 or (866) 230-0745
Rick Rainey, Media Relations (713) 381-3635