Exhibit 99.1

                   Pacific Energy Partners, L.P. to
    Commence Construction of Crude Oil Pipeline to Salt Lake City

    LONG BEACH, Calif.--(BUSINESS WIRE)--April 3, 2006--Pacific Energy
Partners, L.P. (NYSE:PPX) ("Pacific Energy") announced that Rocky
Mountain Pipeline System LLC ("RMPS"), its wholly-owned subsidiary and
primary operating entity in the Rocky Mountain region, is proceeding
with the expansion of its crude oil pipeline system from the terminus
of Frontier Pipeline near Evanston, Wyoming to the Salt Lake City,
Utah refining complex.
    RMPS will construct a new 16-inch pipeline, approximately 91 miles
in length, which will parallel and use the common rights-of-way of its
existing U-Crude pipeline to Salt Lake City for much of that distance.
The new pipeline will be able to transport multiple grades of crude
oil in segregated batches, including Canadian heavy crude oil and
synthetic crude oil. It is designed to provide the capacity necessary
to meet increasing crude oil demand in Salt Lake City, both in the
near-term and well into the future. The new pipeline will be
constructed in two phases, with construction of the first phase
scheduled to begin immediately and be completed in the fourth quarter
of 2006. The completion of the first phase will add additional
capacity into Salt Lake City of approximately 12,000 barrels per day.
The second phase is expected to be completed in October, 2007.
Capacity of the completed pipeline will be approximately 95,000
barrels per day.
    "We are excited to commence construction of this new pipeline to
Salt Lake City," stated Irv Toole, President and Chief Executive
Officer. "Crude oil demand in Salt Lake City continues to grow, and
this pipeline will provide ample capacity for both light and heavy
crude oil for the foreseeable future. This project is an important
component of Pacific Energy's strategy to serve the Rocky Mountain
refining market by providing a strategic pipeline corridor from
Edmonton, Alberta to Salt Lake City for synthetic crude oil supplies
accessed directly in Edmonton, as well as conventional Canadian and
Rocky Mountain crude oil. The project is expected to be accretive to
distributable cash flow to our limited partners."
    RMPS has the necessary permits from the Bureau of Reclamation for
the first 46 miles of pipeline, which will be constructed in the
initial phase of the expansion, and is in the process of securing the
necessary permits for the balance of the project. The majority of the
Salt Lake City refiners have entered into 10-year transportation
agreements with RMPS for firm commitments to dedicate all volumes
shipped on Frontier Pipeline to the new 16-inch pipeline.
    As previously announced, the first phase of the Salt Lake City
pipeline project is expected to cost $32 million. However, Pacific
Energy's total 2006 expansion capital budget of $106 million is being
increased to $118 million to reflect certain costs associated with the
second phase of the project, which are now expected to be incurred in
2006. The total cost for both phases of the project is expected to be
approximately $77 million.

    About Pacific Energy:

    Pacific Energy Partners, L.P. is a master limited partnership
headquartered in Long Beach, California. Pacific Energy is engaged
principally in the business of gathering, transporting, storing and
distributing crude oil, refined products and other related products.
Pacific Energy generates revenues by transporting such commodities on
its pipelines, by leasing capacity in its storage facilities and by
providing other terminaling services. Pacific Energy also buys and
sells crude oil, activities that are generally complementary to its
crude oil operations. Pacific Energy conducts its business through two
business units, the West Coast Business Unit, which includes
activities in California and the Philadelphia, PA area, and the Rocky
Mountain Business Unit, which includes five Rocky Mountain states and
Alberta, Canada.
    Pacific Energy owns a 22.22% interest in and is the operator of
the Frontier Pipeline and will be the 100% owner and operator of the
new pipeline into Salt Lake City.

    This news release may 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.
All statements other than statements of historical fact included or
incorporated herein may constitute forward-looking statements.
Although Pacific Energy believes that the forward-looking statements
are reasonable, it can give no assurance that such expectations will
prove to be correct including the estimated capital cost of the new
pipeline. The forward-looking statements involve risks and
uncertainties that may affect Pacific Energy's operations and
financial performance. Among the factors that could cause results to
differ materially are those risks discussed in Pacific Energy's
filings with the Securities and Exchange Commission, including our
Annual Report on Form 10-K for the year ended December 31, 2005.

    For additional information about the partnership, please visit
www.PacificEnergy.com.



    CONTACT: Pacific Energy Partners, L.P.
             Jennifer Shigei, 562-728-2871
             fax: 562-728-2881
             email: JShigei@PacificEnergy.com