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Sunoco Logistics Mariner East (Pennsylvania Pipeline Project)


Overview of Mariner East Project

Mariner East 1 — The Mariner East 1 project involved repurposing an existing pipeline that previously carried products from the former oil refinery located at Marcus Hook in Delaware County, PA to markets in the west. The pipeline was refurbished, as the Mariner East Project, to carry 70,000 barrels daily of natural gas liquids (liquid propane and ethane) from Western Pennsylvania to Marcus Hook for both domestic distribution and export. Mariner East 1 utilizes mostly existing 8-inch diameter steel pipeline, except for a portion of the line, located in western Pennsylvania that was increased to 12-inch diameter steel pipe. The Mariner East 1 project was completed in late 2014 and is shipping both ethane and propane.

Mariner East 2 — Sunoco Logistics is proposing to expand the existing Mariner East pipeline system through the construction of the Mariner East 2 (PA Pipeline Project) project. When constructed, this project will transport natural gas liquids from Ohio and the Pittsburgh area to the Marcus Hook facility for both domestic distribution and export. The Mariner East 2 pipeline, proposes approximately 350 miles of pipe, spanning Pennsylvania, West Virginia and Ohio. Mariner East 2 will have an initial capacity of approximately 275,000 barrels a day of natural gas liquids using a 20" diameter pipeline. The length of the project through Chester County is approximately 23.6 miles and in Delaware County, 11.4 miles. Approximately 80% of the Mariner East 2/PA Pipeline Project is to be located within existing right-of-ways.

On February 13, 2017, the PA DEP issued the necessary Chapter 105 (Water Obstruction and Encroachment) permits for each county the project will cross and the Chapter 102 (Erosion and Sediment Control) permits for each PA DEP region the project will cross. For additional information on the PaDEP permits, view the DEP permit information near the bottom of this page. Sunoco anticipates that construction of the project will begin in late winter/early spring 2017 and that it will be completed by the end of the third quarter of 2017. Sunoco has also determined that, in addition to the 20" ME2 pipeline, a second 16" pipeline will be added to the Mariner East project easement.  Sunoco anticipates that this pipeline project will be completed in mid- to late 2018.

With the commencement of construction, Sunoco has provided DEP with a 24 hotline number for the Pennsylvania Pipeline Project, also known as Mariner East II (ME2).  This number is: 855-430-4491.  This hotline allows for inquiries and concerns to be directed to Sunoco during construction.  If there are concerns related to erosion and sedimentation and site restoration, residents can contact the Chester County Conservation District (CCCD) at 610-925-4920.  If there are questions or concerns regarding stream or wetland crossings, residents can call DEP directly at 484-250-5900.

For more information on the Mariner East project, view the Sunoco Logistics fact sheet here (updated information posted 2/14/17). 

To view a detailed Q&A sheet about the Mariner East 1 and 2 projects please click here.

Additional information about the Mariner East pipeline project can be viewed at the Sunoco Logistics Pipeline Projects page (information updated 6/23/16).

Click here to visit the Pennsylvania Department of Environmental Protection's (PaDEP) pipeline portal page for the Mariner East 2 project. This page is updated weekly and includes information on inadvertent returns and their status, notices of violation, and consent orders and agreements relating to the project.


Sunoco Mariner East 2 September Newsletter Available

On September 11, 2017, Sunoco released their latest community newsletter to assist residents in staying up to date on the status of the Mariner East 2 project.  As in previous editions, this newsletter gives updates on a county level as to the progress of the project.  Chester and Delaware Counties are known as Segment 6.  Any questions regarding the Mariner East 2 project can be directed to the Sunoco Pipeline Community Affairs team at 855-430-4491.  All calls are answered 24 hours a day and are logged for responses. Read the newsletter here.

Previous Newsletters


Mariner East Mapping

Click to view the proposed route of the Mariner East 1 and Mariner East 2 through Chester County and Delaware County

To view the proposed route of the Mariner East 1 and Mariner East 2 through Chester County please click here.

Sunoco Mariner East 2 Municipal Maps

Sunoco Logistics has distributed a series of maps for the effected municipalities in Chester County that have the Mariner East 2 line proposed to run through them.  These maps show the proposed route of the pipeline, the type of method that is proposed for installation (either horizontal directional drilling (HDD) or open cut method), the areas where the HDD will be staged, as well as the existing Mariner East 1 Pipeline.  You can view the maps here:


Mariner East Activity

On Friday, March 21, 2014, Sunoco Pipeline L.P. filed a petition with the Pennsylvania Public Utility Commission for a Certificate of Public Convenience to exempt any structures housing pump stations and valve control stations involved in the Mariner East Project from municipal zoning, subdivision or land development review. A copy of the petition can be viewed here.

On Friday, June 6, 2014, the Chester County Commissioners submitted a letter to the PA Public Utility Commission expressing their full support for the efforts of municipalities, located within Chester County and within the Commonwealth, that seek to require Sunoco to comply with and respect local zoning ordinances, in relation to the Mariner East Pipeline Project (also known as the Pennsylvania Pipeline Project). View the letter.


PA Administrative Judges Initial Finding

On July 23, 2014, Pennsylvania PUC Administrative Judges issued an Initial Finding regarding the Mariner East project. Sunoco had previously filed petitions requesting the PUC to find that control valve stations and pump stations along their proposed pipeline were reasonably necessary for the convenience or welfare of the public. Approving this request would exempt the operator from local zoning ordinances, as the facilities would be considered public utility buildings. In this application to the PUC, Sunoco was not seeking a certificate of public convenience; authorization to build the Mariner East line; approval for siting or routing of the pipeline; or compliance with environmental or public safety requirements. The Administrative Judges' Initial Finding dismissed the petitions because the pipeline operator's proposed service is not a public utility services as defined by the Pennsylvania Municipalities Planning Code (MPC) as well as the Pennsylvania Business Corporation Law. Read the Administrative Judges' Initial Finding here.


Joint Motion of PUC on Administrative Judges Initial Finding

On October 2, 2014, there was a Joint Motion of the PUC (Vice-Chairman Coleman and Commissioner Witmer) to dismiss all preliminary objections, reverse the Initial Decision, and return Sunoco's amended petitions to the Office of Administrative Law Judge for further proceedings. The Commissioners indicate that this proceeding asks the PUC to decide a very specific question - "whether enclosures (walls and a roof) that are built around and over a valve control or pump station should be exempt from municipal zoning regulation." Additionally, the Joint Motion indicates that based on various mergers dating back to the 1930s, Sunoco is both a "public utility" and a "public utility corporation." Read the Joint Motion here.

To view the Pennsylvania PUC's case information on Docket number P-2014-2411966, any daily actions performed, and all public documents associated with the Sunoco Mariner East project, click here.


Mariner East Pipeline Refill Notification

Sunoco Pipeline, L.P. completed their Line Filling Process on the Mariner East Pipeline. As anticipated, the line filling processes began on 12/19/14 at the Mark West facility in Washington County, PA, and took approximately 7 days to complete.


Joint Motion of PUC on Administrative Judges Initial Finding

On October 2, 2014, there was a Joint Motion of the PUC (Vice-Chairman Coleman and Commissioner Witmer) to dismiss all preliminary objections, reverse the Initial Decision, and return Sunoco's amended petitions to the Office of Administrative Law Judge for further proceedings. The Commissioners indicate that this proceeding asks the PUC to decide a very specific question - "whether enclosures (walls and a roof) that are built around and over a valve control or pump station should be exempt from municipal zoning regulation." Additionally, the Joint Motion indicates that based on various mergers dating back to the 1930s, Sunoco is both a "public utility" and a "public utility corporation." Read the Joint Motion here.


Sunoco Logistics withdraws public utility petitions

On March 5, 2015, Sunoco Logistics Partners LP requested that the Pennsylvania Public Utilities Commission (PA PUC) withdraw the last of 31 requests for exemptions to local zoning rules. See the article here.


West Goshen To Host Sunoco Pump Station Public Meeting

On Tuesday April 14, 2015, the West Goshen Board of Supervisors will host a public meeting at West Chester East High School. This public meeting concerns the ongoing legal dispute with Sunoco Logistics about the Boot Road Pumping Station. The meeting will start promptly at 6:30 and will end at 10:00 p.m. in the auditorium, and will include a presentation from the Township's pipeline safety expert, Accufacts, Inc. Questions about the meeting can be directed to the township at 610-696-5266 or [email protected].

To view the press release, click here.
To view the Proposed Settlement Agreement Fact Sheet, click here.
To view the Proposed Settlement Agreement and Accufacts, Inc. Safety Report (listed in Appendix 5), click here.

West Goshen Township held a public meeting on April 14, 2015 to discuss and vote on a proposed settlement agreement with Sunoco, regarding the Boot Road pumping station. The supervisors voted to table their decision until the May meeting, by a vote of 4-1. View article from the Daily Local News | View article from the Philadelphia Inquirer

West Goshen approves settlement with Sunoco
05-14-15, Daily Local News


Sunoco Logistics Mariner East 2 Open House - June 10 ,2015

On June 10, 2015, Sunoco will be hosting an open house, at the Brandywine Manor House, located at 120 Germany Hollow Road, Honey Brook, PA 19344. The purpose of the open house is to provide potentially impacted landowners and local officials the opportunity to learn more about the Mariner East 2 project, interact directly with officials from Sunoco Logistics and partnering companies on the project, and collect information materials such as maps and fact sheets.

This open house will be held from 5:30-8:30 and is intended to focus on the western half of the Chester County portion of the Mariner East 2 pipeline project, from Elverson Borough, south through Uwchlan Township. A second open house will be held for the eastern portion of Chester County at a later date. Attendees will have a chance to ask questions and address concerns regarding the near and long-term Mariner East 2 project during an informational presentation. Presentations will be held from 6-7 pm and 7:15-8:15 pm.

If you wish to attend, please RSVP to 800-836-1560 or by email at [email protected] Please include your name, address, and municipality.

View the invitation to the open house here. For more information on the Brandywine Manor House, click here.


Sunoco Logistics Mariner East 2 Open House — June 29, 2015

On June 29, 2015, Sunoco will host open house at the Sykes Student Union Building, located at 110 W. Rosedale Avenue on the West Chester University campus.  The purpose of the open house is to provide potentially impacted landowners and local officials the opportunity to learn more about the Mariner East 2 project, interact directly with officials from Sunoco Logistics and partnering companies on the project, and collect information materials such as maps and fact sheets.

This open house will be held from 5:30-8:30 and is intended to focus on the eastern half of the Chester County portion of the Mariner East 2 pipeline project, from West Whiteland Township through Westtown Township.   Attendees will have a chance to ask questions and address concerns regarding the near and long-term Mariner East 2 project during an informational presentation.   Presentations will be held from 6-7 pm and 7:15-8:15 pm.

If you wish to attend, please RSVP to 800-836-1560 or by email at [email protected].  Please include your name, address, and municipality.

View the invitation to the open house here.


Clean Air Council - Mariner East 2 Lawsuit

The Clean Air Council and the Law Offices of Pinnola and Bomstein filed a civil action against Sunoco Pipeline in the Philadelphia County Court of Common Pleas in late August. The lawsuit seeks to establish that Sunoco Pipeline is not a public utility and does not have the right of eminent domain for the proposed Mariner East 2 natural gas liquids project.  The lawsuit claims that the Mariner East project would not serve any public need in Pennsylvania and that Sunoco Pipeline has not received the required regulatory authority for the Mariner East 2 pipeline. As such, the lawsuit claims that Sunoco Pipeline should not be allowed to use eminent domain to build the pipeline. 

To view the Press Release issued on August 27, 2015  click here.
To view the Motion for Preliminary Injunction filed on August 27, 2015 click here.
To view Complaint as Filed with the Philadelphia Court of Common Pleas on August 27, 2015 click here.
To view the Court of Common Pleas Order issued on February 5, 2015 click here
To view the Press Release issued on February 10, 2016 click here.
To view the Daily Local New February 12, 2016 article click here.


Erosion and Sediment Control General Permit

On September 15, 2015, the Chester County Planning Commission provided comments to Sunoco and impacted municipalities regarding the Mariner East Project's Erosion and Sediment Control General Permit (ESCGP-2) application review. A copy of the letter can be viewed here.


Delaware River Basin Commission Hearing for Mariner East 2

Sunoco Pipeline LP has applied to the Delaware River Basin Commission (DRBC) to approve the construction of the Mariner East 2 project (including one 20-inch diameter pipeline and one 16-inch pipeline) within the Delaware River Basin. Sunoco is requesting to withdraw water for dust control, pipeline cleaning, horizontal directional drilling, and hydrostatic testing. The total quantity of water they are estimating for these purposes totals 2.508 million gallons of water. You can view the draft docket here. This project has been assigned docket number D-2015-018-1, and will be heard by the DRBC on Tuesday, November 10, 2015 at 1:30 p.m., with other applications found here.

Written comments will be accepted by the DRBC through the close of business on November 12. If you wish to attend the hearing, the DRBC address is 25 State Police Drive, West Trenton, NJ 08628.


Mariner East 2X Open Season

After completing Open Seasons for the Mariner East 2 system, Sunoco Logistics Partners are in the process of holding an Open Season for Mariner East 2X, which will be able to transport additional volumes of petroleum products, including natural gas liquids and condensate from processing facilities in Western Pennsylvania, West Virginia and Eastern Ohio, to the Marcus Hook Industrial Complex on the Delaware River. The Open Season is offering service for ethane, propane, butane, C3+, natural gas and condensate, depending on customer interest. To view the Open Season Notice, click here.


Sunoco Logistics Integrity Management Programming Work to be Performed

March 8, 2016 - Landowners and municipalities have received notifications that there will be planned integrity work on the 12" pipeline corridor that runs from Elverson, Chester County to Glen Riddle, Delaware County.  This pipeline corridor primarily utilizes the same corridor as the Mariner East 1 and planned Mariner East 2. As part of the integrity management program, inspections and evaluations have been underway identifying sections that will require a repair and /or replacement to ensure the long-term integrity of the pipeline.  This work will be taking place over the next 6 to 8 months, and will begin with surveying along the line in late March or early April.  If it is determined that a property will be directly affected by pipeline repairs and/or replacements, a representative from Sunoco Logistics will contact the owners of those properties.  Landowners are asked to call 855-430-4491 with questions about the project or general inquiries.  You can view the letter here.  You can view a map of the pipeline corridor here.


Information Sheet - June 26, 2016

The PaDEP has issued this information sheet on the status of the Mariner East 2 pipeline project and the permitting process. You can view the information sheet here.


PaDEP Press Release on Mariner East 2 Permit Applications - 07-08-16

The PaDEP has begun its technical review of all Chapter 102 and 105 permit applications submitted by Sunoco Logistics for the Mariner East 2 project (now referred to as the Pennsylvania Pipeline Project). The project requires multiple permits from DEP including permits for earth disturbance of five acres or more and permits for proposed activities located in, along, across, or projecting into a watercourse, floodway or body of water including wetlands. The full press release can be viewed here.

DEP Public Hearing in Chester County

The Southeast Region includes Chester and Delaware counties. The public hearing in this region will be held:
Wednesday August 10, 2016 6:30 P.M - 9:30 P.M.
Sykes Student Union at West Chester University
110 W. Rosedale Avenue, West Chester, PA 19382
Permit information for the Southeast region can be found here.


Pa DEP Issues Technical Deficiency Letters for Sunoco Logistics' Mariner East 2 Project

On September 6, 2016, Pennsylvania DEP issued technical deficiency letters for the Sunoco Logistics Mariner East 2 Project (a.k.a. Pennsylvania Pipeline Project) in Chester and Delaware Counties. These letters outline the technical deficiencies found during the review of the Chapter 105 (Water Obstruction and Encroachment Permit) and the Chapter 102 (Erosion and Sediment Control General Permit (ESCGP-2) for Earth Disturbance Associated with Oil and Gas Exploration, Production, Processing or Treatment Operations or Transmission Facilities, ESCGP-2) Notices of Intent. The reviews were performed by the PA DEP, with extensive input from both Chester County Conservation District and Delaware County Conservation District.


PA DEP Approves PA Pipeline Project/Mariner East 2 Permits

On February 13, 2017, the Pennsylvania Department of Environmental Protection (PA DEP) approved and issued the permits for Sunoco Pipeline LP for the Pa Pipeline Project/Mariner East 2 pipeline project. The permits include a Chapter 105 permit (Water Obstruction and Encroachment) for each county as well as a Chapter 102 (Erosion and Sediment Control) permit for each DEP region the project crosses.

The PaDEP news release can be viewed here.

The PaDEP Mariner East 2 Information sheet can be viewed here.

The full PaDEP Mariner East 2 webpage can be viewed here.