Filed by Plains All American Pipeline, L.P. (1-14569)
Pursuant to Rule 425 under the Securities Act of 1933
Subject Company: Pacific Energy Partners, L.P. (1-31345)
Commission File No. 333-135712

     On November 2, 2006, Plains All American Pipeline, L.P. furnished a current report on Form 8-K, which included the text set forth below:

Item 2.02 and Item 7.01. Results of Operations and Financial Condition; Regulation FD Disclosure

     Plains All American Pipeline, L.P. (the “Partnership”) today issued a press release reporting its third quarter 2006 results. We are furnishing the press release, attached as Exhibit 99.1, pursuant to Item 2.02 and Item 7.01 of Form 8-K. Pursuant to Item 7.01 we are providing detailed guidance for financial performance for the fourth quarter (which supersedes guidance in our 8-K furnished on August 1, 2006) of calendar 2006 and resulting financial performance for the full year of calendar 2006. The Partnership’s guidance excludes any contribution from the proposed merger with Pacific Energy Partners, L.P. (“Pacific Energy”) announced June 12, 2006. Note 12 includes the estimated impact of the Pacific Energy acquisition to our fourth quarter, assuming the acquisition closes on November 15, 2006. In accordance with General Instruction B.2. of Form 8-K, the information presented herein under Item 2.02 and Item 7.01 shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as expressly set forth by specific reference in such a filing.

Update of Fourth Quarter 2006 Estimates

     EBIT and EBITDA (each as defined below in Note 1 to the “Operating and Financial Guidance” table) are non-GAAP financial measures. Net income and cash flows from operating activities are the most directly comparable GAAP measures to EBIT and EBITDA. In Note 11 below, we reconcile EBITDA and EBIT to net income for the 2006 guidance periods presented. However, it is impractical to reconcile EBIT and EBITDA to cash flows from operating activities for forecasted periods. We encourage you to visit our website at www.paalp.com, in particular the section entitled “Non-GAAP Reconciliation,” which presents a historical reconciliation of certain commonly used non-GAAP financial measures, including EBIT and EBITDA. We present EBIT and EBITDA because we believe they provide additional information with respect to both the performance of our fundamental business activities and our ability to meet our future debt service, capital expenditures and working capital requirements. We also believe that debt holders commonly use EBITDA to analyze partnership performance. In addition, we have highlighted the impact of our long-term incentive plan, the cumulative effect of a change in accounting principle, gains and losses related to SFAS 133 (primarily non-cash, mark-to-market adjustments) to the extent known, interest expense related to our New Senior Notes (as defined in Note 7) and interest income from the investment of the net proceeds from the New Senior Notes on EBITDA, Net Income and Net Income per Basic and Diluted Limited Partner Unit.

     The following guidance for the three month period ending December 31, 2006 is based on assumptions and estimates that we believe are reasonable given our assessment of historical trends, business cycles and other information reasonably available. However, our assumptions and future performance are both subject to a wide range of business risks and uncertainties, so no assurance can be provided that actual performance will fall within the guidance ranges. Please refer to the information under the caption “Forward-Looking Statements and Associated Risks” below. These risks and uncertainties, as well as other unforeseeable risks and uncertainties, could cause our actual results to differ materially from those in the following table. The operating and financial guidance provided below is given as of the date hereof, based on information known to us as of November 1, 2006. We undertake no obligation to publicly update or revise any forward-looking statements.

Plains All American Pipeline, L.P.
Operating and Financial Guidance
(in millions, except per unit data)

		Actual				Guidance*
		Nine Months				Three Months Ending								Twelve Months Ending
		Ended				December 31, 2006								December 31, 2006
		09/30/06				Low				High				Low				High
Pipeline
Net revenues		$	319.4			$	110.3			$	111.7			$	429.7			$	431.1
Field operating costs			(138.1	)			(47.2	)			(46.6	)			(185.3	)			(184.7	)
General and administrative expenses			(38.0	)			(12.4	)			(12.2	)			(50.4	)			(50.2	)
			143.3				50.7				52.9				194.0				196.2
Gathering, Marketing, Terminalling & Storage
Net revenues			382.8				115.0				121.4				497.8				504.2
Field operating costs			(122.4	)			(43.0	)			(42.4	)			(165.4	)			(164.8	)
General and administrative expenses			(54.2	)			(19.9	)			(19.6	)			(74.1	)			(73.8	)
			206.2				52.1				59.4				258.3				265.6
Segment Profit			349.5				102.8				112.3				452.3				461.8
Depreciation and amortization expense			(67.1	)			(27.0	)			(26.6	)			(94.1	)			(93.7	)
Interest expense — existing notes and facilities			(52.5	)			(20.1	)			(19.3	)			(72.6	)			(71.8	)
Interest expense — New Senior Notes (See Note 7 & 8)			—				(10.8	)			(10.8	)			(10.8	)			(10.8	)
Interest income — New Senior Notes (See Note 7 & 8)			—				8.7				8.7				8.7				8.7
Equity earnings (loss) in PAA / Vulcan Gas Storage, LLC			2.2				2.8				3.3				5.0				5.5
Other Income (Expense)			0.7				—				—				0.7				0.7
Income Before Cumulative Effect of Change in Accounting Principle			232.8				56.4				67.6				289.2				300.4
Cumulative Effect of Change in Accounting Principle			6.3				—				—				6.3				6.3
Net Income		$	239.1			$	56.4			$	67.6			$	295.5			$	306.7
Net Income to Limited Partners		$	212.7			$	44.4			$	55.4			$	257.1			$	268.1
Basic Net Income Per Limited Partner Unit
Weighted Average Units Outstanding			77.0				81.0				81.0				78.0				78.0
Net Income Per Unit **		$	2.45			$	0.55			$	0.68			$	3.09			$	3.16
Diluted Net Income Per Limited Partner Unit
Weighted Average Units Outstanding			77.8				82.0				82.0				78.8				78.8
Net Income Per Unit **		$	2.43			$	0.54			$	0.67			$	3.06			$	3.13
EBIT		$	291.6			$	78.6			$	89.0			$	370.2			$	380.6
EBITDA		$	358.7			$	105.6			$	115.6			$	464.3			$	474.3

Excluding Selected Items Impacting Comparability
Adjusted EBITDA		$	364.7			$	115.0			$	125.0			$	479.7			$	489.7
Adjusted Net Income		$	245.1			$	67.9			$	79.1			$	313.0			$	324.2
Adjusted Basic Net Income per Limited Partner Unit		$	2.84			$	0.69			$	0.82			$	3.53			$	3.66
Adjusted Diluted Net Income per Limited Partner Unit		$	2.81			$	0.68			$	0.81			$	3.49			$	3.62

Notes and Significant Assumptions:

1.

Definitions.

EBIT		Earnings before interest and taxes
EBITDA		Earnings before interest, taxes and depreciation and amortization expense
Bbls/d		Barrels per day
Segment Profit		Net revenues less purchases, field operating costs, and segment general and administrative expenses
LTIP		Long-Term Incentive Plan
LPG		Liquefied petroleum gas and other petroleum products
FX		Foreign currency exchange
GMT&S		Gathering, Marketing, Terminalling & Storage

2.		Pipeline Operations. Pipeline volume estimates are based on historical trends, anticipated future operating performance and completion of internal growth projects. Volumes are influenced by temporary market-driven storage and withdrawal of oil, maintenance schedules at refineries, production declines and other external factors beyond our control. Actual segment profit could vary materially depending on the level of volumes transported.
		The following table summarizes our total pipeline volumes and highlights as major systems that are significant either in total volumes transported or in contribution to total pipeline segment profit.

		Calendar 2006
		Actual				Guidance
		Nine Months				Three Months				Twelve Months
		Ended				Ending				Ending
		September 30				December 31				December 31
Average Daily Volumes (000 Bbls/d)
All American			49				45				48
Basin			323				350				330
BOA / CAM			57	(1)			172				86
Capline			149				185				158
Cushing to Broome			73				80				75
North Dakota / Trenton			88				92				89
West Texas / New Mexico area systems (2)			445				428				441
Canada			247				254				250
Other			553				580	(3)			558
			1,984				2,186				2,035
Average Segment Profit ($/Bbl)
As Reported		$	0.27			$	0.26	(4)		$	0.26	(4)
Excluding Selected Items Impacting Comparability		$	0.29			$	0.28	(4)		$	0.29	(4)

(1)		Acquisition effective in third quarter of 2006.
(2)		The aggregate of multiple systems in the West Texas / New Mexico area.
(3)		Includes approximately 45,000 Bbl/d related to assets purchased from Chevron Pipe Line Company effective September 1, 2006.
(4)		Mid-point of guidance.

Segment profit is forecast using the volume assumptions in the table above, priced at tariff rates currently received, less estimated field operating costs and G&A expenses. Field operating costs do not include depreciation.

To illustrate the impact volume changes may have on fourth quarter segment profit, the following table provides a volume sensitivity analysis of three systems representing approximately 28% of total pipeline net revenues.

Volume Sensitivity Analysis
						% of				Incr (Decr)
		Incr (Decr)				System				in Segment
System		in Volume				Total				Profit Guidance
		(Bbls/d)								(in millions)
All American			5,000				11	%		$	0.9
Basin			20,000				6	%			0.5
Capline			10,000				5	%			0.3

3.

Gathering, Marketing, Terminalling and Storage Operations. The level of profit in the GMT&S segment is influenced by overall market structure and the degree of volatility in the crude oil market as well as variable operating expenses. Operating results for the three-month period ending December 31, 2006 reflect an expected continuation of the current contango market and favorable market conditions (relative to our asset base and business model) generally consistent with the conditions experienced over most of 2005 and 2006 to date, although not quite as favorable as market conditions in the first nine months of 2006. Unexpected changes in market structure or volatility (or lack thereof) could cause actual results to differ materially from forecasted results.

		Calendar 2006
		Actual				Guidance
		Nine Months				Three Months				Twelve Months
		Ended				Ending				Ending
		September 30				December 31				December 31
Average Daily Volumes (000 Bbls/d)
Crude Oil Lease Gathering			639				650				642
LPG Sales and Third Party Processing			60				90				68
Waterborne foreign crude imported			59				50				57
			758				790				767
Segment Profit per Barrel ($/Bbl)
As Reported		$	1.00			$	0.77	(1)		$	0.94	(1)
Excluding Selected Items Impacting Comparability		$	1.00			$	0.83	(1)		$	0.95	(1)

(1)		Mid-point of guidance.

Segment profit is forecast using the volume assumptions stated above and estimates of unit margins, field operating costs, G&A expenses and carrying costs for contango inventory based on current and anticipated market conditions. Field operating costs do not include depreciation. Realized unit margins for any given lease-gathered barrel could vary significantly based on a variety of factors including location, quality and contract structure. Based on our mid-point projection of adjusted segment profit per barrel for the three months ending December 31, 2006, a 15,000 Bbl/d variance in lease gathering volumes would impact fourth-quarter segment profits by approximately $1.0 million. A $0.01 variance in the aggregate average per-barrel margin would impact fourth-quarter segment profits by approximately $0.7 million.

4.

Depreciation and Amortization. Depreciation and amortization are forecast based on our existing depreciable assets and forecasted capital expenditures. Depreciation is computed using the straight-line method over estimated useful lives, which range from 3 years (for office furniture and equipment) to 40 years (for certain pipelines, crude oil terminals and facilities).

5.

Statement of Financial Accounting Standards No. 133 “Accounting for Derivative Instruments and Hedging Activities” (SFAS 133). The guidance presented above does not include assumptions or projections with respect to potential gains or losses related to derivatives accounted for under SFAS 133, as there is no accurate way to forecast these potential gains or losses. The potential gains or losses related to these derivatives (primarily mark-to-market adjustments) could cause actual net income to differ materially from our projections.

6.

Acquisitions and Capital Expenditures. Although acquisitions constitute a key element of our growth strategy, the forecasted results and associated estimates do not include any assumptions or forecasts for any other acquisition that may be made after the date hereof. Capital expenditures for expansion projects are forecast to be approximately $310 million during calendar 2006 of which $214 million was incurred in the first nine months of 2006. Following are some of the more notable projects and estimated expenditures for the year.

		Calendar 2006
		(in millions)
Expansion Capital
• St. James, Louisiana storage facility — Phase I		$	72
• St. James, Louisiana storage facility — Phase II			12
• Kerrobert tankage			31
• East Texas/Louisiana tankage			17
• Spraberry System expansion			15
• Cushing Tankage — Phase VI			14
• High Prairie rail terminals			13
• Midale/Regina truck terminal			13
• Truck trailers			9
• Wichita Falls tankage			8
• Basin connection—Oklahoma			8
• Mobile/ Ten Mile tankage and metering			6
• Other Projects			92
			310
Maintenance Capital			21
Total Projected Capital Expenditures (excluding acquisitions)		$	331

7.		Capital Structure. This guidance is based on our capital structure as of September 30, 2006 as adjusted to give effect to the aggregate $1 billion private placement of 10-year and 30-year senior notes (“New Senior Notes”) that closed on October 30, 2006. The net proceeds from the New Senior Notes will be used to fund the cash portion of the Pacific Energy acquisition expected to close in the fourth quarter of 2006. Pending closing of the Pacific Energy merger, we intend to invest excess proceeds that are not used to repay outstanding indebtedness or for general partnership purposes in short-term investments. In the event the Pacific Energy acquisition does not close by February 15, 2007, we are required to call the New Senior Notes at 101% of the principal amount. See Note 8 for treatment of interest expense and interest income attributable to the New Senior Notes during the fourth quarter.
		The Partnership’s policy is to finance acquisitions and major growth capital projects with at least 50% equity or cash flow in excess of distributions.

8.		Interest Expense. Debt balances are projected based on estimated cash flows, current distribution rates, forecasted capital expenditures for maintenance and expansion projects, expected timing of collections and payments, and forecasted levels of inventory and other working capital sources and uses.
		Interest expense for the three months ending December 31, 2006 is expected to be between $19.3 million and $20.1 million, assuming an average long-term debt balance excluding the New Senior Notes of approximately $1.3 billion during the period and an all-in average rate of approximately 6.2%. Included in the effective cost of debt are projected interest payments, as well as commitment fees, amortization of long-term debt discounts, deferred amounts associated with terminated interest-rate hedges and interest on short-term debt for non-contango inventory (primarily hedged LPG inventory and New York Mercantile Exchange and International Petroleum Exchange margin deposits). At September 30, 2006, 100% of our long-term debt balance was fixed at an average interest rate of 6.1%. Interest expense does not include interest on borrowings for contango inventory. We treat those costs as carrying costs of crude oil and include it as part of the purchase price of crude oil.
		The amount of interest expense noted in the preceding paragraph excludes approximately $10.8 million of interest expense associated with the New Senior Notes discussed in Note 7 above, as well as approximately $8.7 million of interest income earned from investing the net proceeds from the notes offering pending closing of the Pacific Energy acquisition. These amounts are included as separate line items in our primary guidance table, but have been treated as Selected Items Impacting Comparability in arriving at Adjusted EBITDA and Adjusted Net Income. We believe this is consistent with our treatment of excluding any contribution from Pacific Energy in our guidance pending the closing of the acquisition. In the event the Pacific Energy acquisition does not close by February 15, 2007, we are required to call the New Senior Notes at 101% of the principal amount. See Note 12 for an estimate on Adjusted EBITDA and Adjusted Net Income of the impact of the Pacific Energy acquisition assuming the acquisition closes on November 15, 2006.
9.		Net Income per Unit. Basic net income per limited partner unit is calculated by dividing net income allocated to limited partners by the basic weighted average units outstanding during the period. Under Emerging Issues Task Force Issue 03-06: Participating Securities and the Two-Class Method under FASB Statement No. 128 (“EITF 03-06”), when the Partnership’s aggregate net income exceeds the aggregate distribution made during such period, earnings per limited partner unit are calculated as if all of the earnings for the period were distributed, regardless of the pro forma nature of the allocation and whether those earnings would actually be distributed during a particular period from an economic or practical perspective. Although EITF 03-06 does not impact overall net income or other financial results of the Partnership, for periods in which aggregate net income exceeds the aggregate distributions for such period, earnings per limited partner unit will be reduced. The following table sets forth the computation of basic and diluted earnings per limited partner unit.

		Guidance (in millions, except per unit data)
		Three Months Ending								Twelve Months Ending
		December 31, 2006								December 31, 2006
		Low				High				Low				High
Numerator for basic and diluted earnings per limited partner unit:
Net Income		$	56.4			$	67.6			$	295.5			$	306.7
Less:
General partner’s incentive distribution			(11.1	)			(11.1	)			(33.1	)			(33.1	)
			45.3				56.5				262.4				273.6
General partner 2% ownership			(0.9	)			(1.1	)			(5.3	)			(5.5	)
Net income available to limited partners			44.4				55.4				257.1				268.1
Pro forma additional general partner’s distribution			—				—				(16.1	)			(21.5	)
Net Income available for limited partners under EITF 03-06		$	44.4			$	55.4			$	241.0			$	246.6
Denominator:
Denominator for basic earnings per limited partner unit-weighted average number of limited partner units			81.0				81.0				78.0				78.0
Effect of dilutive securities:
Weighted average LTIP units			1.0				1.0				0.8				0.8
Denominator for diluted earnings per limited partner unit-weighted average number of limited partner units			82.0				82.0				78.8				78.8
Basic net income per limited partner unit		$	0.55			$	0.68			$	3.09			$	3.16
Diluted net income per limited partner unit		$	0.54			$	0.67			$	3.06			$	3.13

		Net income allocated to limited partners is impacted by the income allocated to the general partner and the amount of the incentive distribution paid to the general partner. The amount of income allocated to our limited partnership interests is 98% of the total partnership income after deducting the amount of the general partner’s incentive distribution. Based on our current annualized distribution rate of $3.00 per unit, our general partner’s distribution is forecast to be approximately $49.3 million annually, of which $44.3 million is attributed to the incentive distribution rights. The relative amount of the incentive distribution varies directionally with the number of units outstanding and the level of the distribution on the units. For distribution rates where EITF 03-06 does not apply, each $0.05 per unit annual increase in the distribution over $3.00 per unit decreases net income available for limited partners by approximately $4.0 million ($0.05 per unit) on an annualized basis.
10.		Long-term Incentive Plans. The majority of grants outstanding under our Long-Term Incentive Plans contain vesting criteria that are based on a combination of performance benchmarks and service period. The grants will vest in various percentages, typically on the later to occur of specified earliest vesting dates and the dates on which minimum distribution levels are reached. Among the various grants, vesting dates range from May 2007 to December 2010 and minimum annualized distribution levels range from $2.60 to $4.00. For some awards, a percentage of any remaining units will vest on a date certain in 2011 or 2012.
		We have reached the annualized distribution level of $3.00 and it has been deemed probable that the $3.20 distribution level will be achieved. Accordingly, guidance includes, for grants that vest at annualized distribution levels of $3.20 or less, an accrual over the corresponding service period at an assumed market price of $46.15 per unit as well as the fair value associated with awards that will vest on a date certain. For 2006, the guidance includes approximately $36.5 million of principally non-cash expense associated with these grants. The earliest significant vesting event for outstanding grants will occur in May 2007.

		The actual amount of LTIP expense amortization in any given year will be directly influenced by our unit price at the end of each reporting period and the amount of amortization in the early years as well as new unit grants. Therefore, actual net income could differ materially from our projections.
		Effective January 1, 2006 we adopted SFAS 123(R) Share-Based Payment, resulting in a cumulative effect of change in accounting principle gain of $6.3 million.
11.		Reconciliation of EBITDA and EBIT to Net Income. The following table reconciles the 2006 guidance ranges for EBITDA and EBIT to net income.

		Guidance
		Three Months Ending								Twelve Months Ending
		December 31, 2006								December 31, 2006
		Low				High				Low				High
		(in millions)
Reconciliation to Net Income
EBITDA		$	105.6			$	115.6			$	464.3			$	474.3
Depreciation and amortization			27.0				26.6				94.1				93.7
EBIT			78.6				89.0				370.2				380.6
Interest expense — existing notes and facilities			20.1				19.3				72.6				71.8
Interest expense — New Senior Notes, net			2.1				2.1				2.1				2.1
Net Income		$	56.4			$	67.6			$	295.5			$	306.7

12.

Combined Plains and Pacific Energy Guidance. Plains and Pacific Energy will each hold their respective unitholder meetings on November 9, 2006 seeking approval of the proposed merger between Plains and Pacific Energy. The following table presents adjusted EBITDA and adjusted net income for the combined entities assuming the proposed merger is approved and closing occurs on November 15, 2006. The Pacific Energy information is derived from Pacific Energy’s guidance contained in its press release dated November 1, 2006, however, it excludes the impact of anticipated transaction synergies and contributions from capital expansion projects under construction. Although we have not reviewed Pacific Energy’s calculation of its guidance ranges, we believe that the estimates are reasonable.

		For the Three Months Ending December 31, 2006
						Pacific				Combined
		Plains				Energy				Guidance
		(midpoint of guidance amounts; in millions)
Adjusted EBITDA		$	120.0			$	18.5	1		$	138.5
Interest Expense			(19.7	)			(11.2	)2			(30.9	)
Depreciation and amortization			(26.8	)			(5.6	)3			(32.4	)
Adjusted Net Income		$	73.5			$	1.7			$	75.2
Basic Units Outstanding			81.0				11.1				92.1
Diluted Units Outstanding			82.0				11.1				93.1
Adjusted Basic Net Income per Limited Partner Unit		$	0.76							$	0.67
Adjusted Diluted Net Income per Limited Partner Unit		$	0.75							$	0.66

Forward-Looking Statements and Associated Risks

     All statements included in this report, other than statements of historical fact, are forward-looking statements, including, but not limited to, statements identified by the words “anticipate,” “believe,” “estimate,” “expect,” “plan,” “intend” and “forecast” and similar expressions and statements regarding our business strategy, plans and objectives of our management for future operations. However, the absence of these words does not mean that the statements are not forward-looking. These statements reflect our current views with respect to future events, based on what we believe are reasonable assumptions. Certain factors could cause actual results to differ materially from results anticipated in the forward-looking statements. These factors include, but are not limited to:

	•		our failure to successfully integrate the respective business operations upon completion of the merger with Pacific Energy or our failure to successfully integrate any future acquisitions;
	•		the failure to realize the anticipated cost savings, synergies and other benefits of the proposed merger with Pacific Energy;
	•		the success of our risk management activities;
	•		environmental liabilities or events that are not covered by an indemnity, insurance or existing reserves;
	•		maintenance of our credit rating and ability to receive open credit from our suppliers and trade counterparties;

	•		abrupt or severe declines or interruptions in outer continental shelf production located offshore California and transported on our pipeline system;
	•		declines in volumes shipped on the Basin Pipeline, Capline Pipeline and our other pipelines by us and third party shippers;
	•		the availability of adequate third party production volumes for transportation and marketing in the areas in which we operate;
	•		demand for natural gas or various grades of crude oil and resulting changes in pricing conditions or transmission throughput requirements;
	•		fluctuations in refinery capacity in areas supplied by our main lines;
	•		the availability of, and our ability to consummate, acquisition or combination opportunities;
	•		our access to capital to fund additional acquisitions and our ability to obtain debt or equity financing on satisfactory terms;
	•		successful integration and future performance of acquired assets or businesses and the risks associated with operating in lines of business that are distinct and separate from our historical operations;
	•		unanticipated changes in crude oil market structure and volatility (or lack thereof);
	•		the impact of current and future laws, rulings and governmental regulations;
	•		the effects of competition;
	•		continued creditworthiness of, and performance by, our counterparties;
	•		interruptions in service and fluctuations in tariffs or volumes on third party pipelines;
	•		increased costs or lack of availability of insurance:
	•		fluctuations in the debt and equity markets, including the price of our units at the time of vesting under our Long-Term Incentive Plans;
	•		the currency exchange rate of the Canadian dollar;
	•		the impact of crude oil and natural gas price fluctuations;
	•		shortages or cost increases of power supplies, materials or labor;
	•		weather interference with business operations or project construction;
	•		risks related to the development and operation of natural gas storage facilities;
	•		general economic, market or business conditions; and
	•		other factors and uncertainties inherent in the marketing, transportation, terminalling, gathering and storage of crude oil and liquefied petroleum gas.

     We undertake no obligation to publicly update or revise any forward-looking statements. Further information on risks and uncertainties is available in our filings with the Securities and Exchange Commission, which information is incorporated by reference herein.

Investor Notice

     Plains All American Pipeline, L.P. has filed with the Securities and Exchange Commission a registration statement on Form S-4 (as the same may be supplemented or amended, Registration No. 333-135712) containing the joint proxy statement/prospectus of Plains All American Pipeline, L.P. and Pacific Energy Partners, L.P. and other documents in relation to the merger between Plains All American Pipeline, L.P. and Pacific Energy Partners, L.P. Investors and security holders are urged to read carefully these documents because they contain important information regarding Plains All American Pipeline, L.P., Pacific Energy Partners, L.P. and the merger. A definitive joint proxy statement/prospectus has been sent to security holders of Plains All American Pipeline, L.P. and Pacific Energy Partners, L.P. seeking their approval of the transactions contemplated by the merger agreement. Investors and security holders may obtain a free copy of the definitive joint proxy statement/prospectus and other documents containing information about Plains All American Pipeline, L.P. and Pacific Energy Partners, L.P., without charge, at the SEC’s website at www.sec.gov. Copies of the definitive joint proxy statement/prospectus and the SEC filings that are incorporated by reference in the definitive joint proxy statement/prospectus may also be obtained free of charge by directing a request to the respective partnerships as follows: Information regarding Plains All American Pipeline can be obtained by contacting its investor relations department at 713-646-4100 or by accessing its website at www.paalp.com, and information regarding Pacific Energy Partners can be obtained by contacting its investor relations department at 562-728-2871 or by accessing its website at www.PacificEnergy.com.

     Plains All American Pipeline, L.P. and Pacific Energy Partners, L.P. and the officers and directors of the respective general partners of Plains All American Pipeline, L.P. and Pacific Energy Partners, L.P. may be deemed to be participants in the solicitation of proxies from their security holders. Information about these persons can be found in Plains All American Pipeline, L.P.’s and Pacific Energy Partners, L.P.’s respective Annual Reports on Form 10-K and Form 10-K/A filed with the SEC, and additional information about such persons may be obtained from the joint proxy statement/prospectus.

     This document shall not constitute an offer to sell or the solicitation of an offer to buy any securities, nor shall there be any sale of securities in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction. No offering of securities shall be made except by means of a prospectus meeting the requirements of the Securities Act of 1933, as amended.