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SemGroup and DCP Midstream Extend Open Season on Existing Capacity of NGL Pipeline Connecting DJ Basin to Mont Belvieu

Tulsa, Okla. – June 25, 2018 – SemGroup® Corporation (NYSE:SEMG) and DCP Midstream, LP (NYSE:DCP) today announced that, due to shipper interest, they have extended by one week the binding open season for natural gas liquids (NGL) transportation service from the DJ Basin to Mont Belvieu, Texas.

The transportation capacity is available via a soon-to-be converted portion of White Cliffs Pipeline and Southern Hills Pipeline, connecting Weld County, Colorado to Mont Belvieu, Texas. The project, which is expected to be in service in the fourth quarter of 2019, will provide DJ Basin customers with increased NGL takeaway capacity and open access to the Texas Gulf Coast markets. SemGroup owns 51 percent of White Cliffs Pipeline and is the operator. DCP owns 66 percent of Southern Hills Pipeline and is the operator.

Shippers will move product under a published joint tariff between the two carriers. The open season is being held to provide prospective shippers an opportunity to receive discount transportation rates in exchange for long-term volume commitments. Open Season began May 24, 2018, and will now conclude at 5 p.m. Central Time on July 2, 2018.

Prospective shippers should contact Grant Najera, Commercial Asset Manager for SemGroup, at 918-524-8525, or, or Brittany Wright, NGL Business Development for DCP Midstream, at 713-735-3657 or

About SemGroup
SemGroup® Corporation (NYSE:SEMG) moves energy across North America through a network of pipelines, processing plants, refinery-connected storage facilities and deep-water marine terminals with import and export capabilities. SemGroup serves as a versatile connection between upstream oil and gas producers and downstream refiners and end users. Key areas of operation and growth include western Canada, the Mid-Continent and the Gulf Coast. SemGroup is committed to safe, environmentally sound operations. Headquartered in Tulsa, Okla., the company has additional offices in Calgary, Alberta; Platteville, Colo.; and Channelview, Texas.

SemGroup uses its Investor Relations website and social media outlets as channels of distribution of material company information. Such information is routinely posted and accessible on our Investor Relations website at, our Twitter account and LinkedIn account.

About DCP Midstream, LP
DCP Midstream, LP (NYSE: DCP) is a midstream master limited partnership headquartered in Denver, Colorado, with a diversified portfolio of gathering and processing assets in addition to logistics and marketing assets. DCP is one of the largest natural gas liquids producers and marketers and one of the largest natural gas processors in the U.S. The owner of DCP's general partner is a joint venture between Enbridge and Phillips 66. For more information, visit the DCP Midstream, LP website at

Forward-Looking Statements
Certain matters contained in this Press Release include "forward-looking statements" within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. We make these forward-looking statements in reliance on the safe harbor protections provided under the Private Securities Litigation Reform Act of 1995.

All statements, other than statements of historical fact, included in this Press Release may constitute
forward-looking statements. Although we believe that the expectations reflected in these forward-looking
statements are reasonable, we cannot assure you that these expectations will prove to be correct. These
forward-looking statements are subject to certain known and unknown risks and uncertainties, as well as
assumptions that could cause actual results to differ materially from those reflected in these forwardlooking
statements. Factors that might cause actual results to differ include the risk factors discussed
from time to time in each of our documents and reports filed with the SEC.

Readers are cautioned not to place undue reliance on any forward-looking statements contained in this
Press Release, which reflect management's opinions only as of the date hereof. Except as required by
law, we undertake no obligation to revise or publicly release the results of any revision to any forwardlooking

SemGroup Investor Relations:
Alisa Perkins

SemGroup Media:
Tom Droege

DCP Midstream Investor Relations:
Irene Lofland

DCP Midstream Media:
Sarah Sandberg