coverChester County Department of Facilities releases Geotechnical Impact and Sinkhole Risk Assessment Report for the Sunoco Mariner East 2 Pipeline at Chester County Library and Chester Valley Trail properties.

On February 1, 2021, the Chester County Department of Facilities released the Geotechnical Impact and Sinkhole Risk Assessment Report, which was an independent study of the county-owned properties of the Chester County Library and the Chester Valley Trail in West Whiteland Township. The risk assessment report, which was prepared by GeoStructures Geotechnical Engineering Consultants, is based on field exploration, USGS publications research, and the review of public records on the pipeline construction. The report identifies various karst features and weaknesses in the ground and rock at both properties in the vicinity of the pipeline and lists recommendations for geotechnical treatments. View the report.

Adelphia Gateway to begin construction activities

On October 5, 2020, Adelphia Gateway received its Notice to Proceed from FERC. This notice allows Adelphia to begin construction activities on the pipeline which, in Chester County, will consist of valve replacements and new valve construction. Adelphia Gateway will be sending mailers to property owners with property within the Adelphia pipeline route, as well as those owners with property abutting the route. Construction is anticipated to begin within the next two weeks. If you have questions related to the project, Adelphia has a project hotline number of 800-483-3179 and an email address of

PADEP approves ME2 permit modifications for two sites in Chester County

On September 22, 2020, DEP announced that previously applied for permit amendments, addressing installation methodology, were approved for ME2 in Chester and Delaware Counties. The two locations in Chester County include a site near the PA Turnpike in Upper Uwchlan Township and a site near the Exton Bypass and AMTRAK and Norfolk Southern rail lines in West Whiteland Township.

PA DEP issues Administrative Order to Sunoco LP for violations of the Clean Streams Law and the Dam Safety and Encroachment Act

On September 11, 2020, PA DEP issued an Administrative Order to Sunoco LP, that immediately suspends all work authorized by their previous permitting until the PA DEP has issued written authorization to resume work, requires that Sunoco take the steps necessary to implement the reroute of HDD S-3-290 that was previously found to be technically feasible, and within 30 days of the Order, Sunoco is required to submit a report fully explaining how the August 10, 2020 inadvertent return occurred and how the August 11, 2020 subsidence event occurred. Further, Sunoco must address all impacts to waters of the Commonwealth that occurred, by restoring and remediating all impacted uses. Learn more.

Columbia Pipeline performing maintenance work in Uwchlan Township

Starting the week of August 31, 2020, Columbia/TransCanada will be performing maintenance to their cathodic protection along the line in Uwchlan Township, in the area of the Struble Trail. This work is expected to last for several weeks.

PA DEP issues Notice of Violation to Sunoco/Energy Transfer for violations of the Clean Stream Law

On August 20, 20202, the PA DEP issued a formal Notice of Violation for violations to the Clean Stream Law by the Mariner East 2 project (a.k.a. Pennsylvania Pipeline Project) related to the inadvertent return of drilling solution that discharged into a wetland and unnamed tributaries of Marsh Creek Reservoir. View the letter.

Chester County Commissioners Send Second Letter to Governor Wolf Requesting Revocation of Permits for Mariner East 2

Following further information regarding major Mariner East 2 Pipeline incidents, the Chester County Commissioners sent a letter to Governor Wolf on August 18 requesting Sunoco's permits authorizing construction be revoked, stating civil penalties and temporary suspension are no longer sufficient. View the letter.

Chester County Commissioners Send Letter to Governor Wolf Requesting Suspension of Mariner East 2 Pipeline

Following major Mariner East 2 Pipeline incidents, the Chester County Commissioners sent a letter to Governor Wolf on August 12 requesting suspension of Sunoco's authority to construct and operate the Mariner East 2 pipeline. View the letter.

PUC Investigation Under Way Involving Subsidence Incidents in West Whiteland

On July 17, 2020, in response to reports of several instances of subsidence near pipelines, PA PUC launched an investigation involving engineers and experts from the Safety Division of the Bureau of Investigation and Enforcement. While the first subsidence occurred on July 10, additional incidents have developed throughout the week. View the press release.

Chester and Delaware Counties send joint letter to PA DCED and the PA Health Dept. on Sunoco waivers

On April 11, 2020 the Chairs of both the Chester County Commissioners and Delaware County Council sent a letter to the PA Department of Community and Economic Development (DCED) and the PA Department of Health regarding the waivers that were issued to Energy Transfer, LP (ET). Officials expressed concerns that not only did ET apply directly to the Governor's office, which was not the protocol to apply for a waiver, but that non-compliant behavior (contrary to the CDC and OSHA guidelines) could trigger a COVID-19 hot spot which would further burden the health care system and impose risk to the community at large. View the letter.

Pipeline Safety Coalition Releases Guidebook

On March 27,2020 the Pipeline Safety Coalition released their Chester County Preparedness & Emergency Response Guidebook. This document was funded through a Technical Assistance Grant (TAG) from the Pipeline and Hazardous Materials Safety Administration (PHMSA). The Pipeline Safety Coalition created this guidebook to help Chester County residents prepare a planned response to a natural gas or hazardous liquids release. See the Guidebook.

Commissioners Establish Pipeline Safety Advisory Board (updated)

On December 12, 2019, the Chester County Board of Commissioners unanimously approved a motion to appoint the members of the Pipeline Safety Advisory Board. See the listing of Board members on page four of the Commissioners' meeting minutes.

The purpose of this Board is to bring together emergency response experts, municipal officials, industry representative, and members of the public who live along a pipeline right-of-way to review, discuss, and make recommendations to the Commissioners and county departments on how to ensure citizen safety when it comes to pipelines.

FERC Issues Certificate of Public Convenience and Necessity for Adelphia Gateway

In an Order, dated December 20, 2019, FERC has issued a Certificate of Public Convenience and Necessity authorizing Adelphia Gateway, LLC to acquire, construct, and operate a new interstate pipeline system. View the Order.

Chester County Commissioners provide input on House Bill 1735: Pipeline Early Detection and Warning Board

On September 17, 2019, the Chester County Commissioners provided feedback on legislation proposed by Rep Danielle Friel-Otten for the creation of a Pipeline Early Detection and Warning Board for Pennsylvania under the Department of Community and Economic Development.

Chester County files comments with the PUC regarding the Advanced Notice of Proposed Rulemaking regarding Hazardous Liquid Public Utility Safety Standards

On September 11, 2019 the County of Chester filed comments with the PA PUC as part of the Advanced Notice of Proposed Rulemaking (ANOPR) for Hazardous Liquids Public Utility Safety Standards. The purpose of the comments is to provide input into the amendment and enhancement of Chapter 59, which relates to the PA PUC and the regulation of public utilities which transport petroleum products and other hazardous liquids.

Website Overview

MapNearly 600 linear miles of pipeline corridors cross Chester County's landscape. Many of these pipelines have been in place for decades but, more recently, the construction of new lines and upgrades to existing ones have increased in the county. Much of the pipeline activity is a result of the expansion of gas extraction in the Marcellus and Utica Shale regions. The increased extraction has, in turn, created a greater demand for pipeline capacity to transport the resulting products.

The Pipeline Information Center (PIC) was created to provide current information on pipelines and pipeline activity in Chester County. The Chester County Planning Commission maintains the Pipeline Information Center website and serves as the County's Point of Contact for interaction and information exchange with residents, landowners, operators, non-profits, and regulatory agencies. The website serves as a central location for information and updates on proposed and active pipeline projects. The Pipeline Information Center also supports pipeline safety and public awareness through a partnership with pipeline providers, regulators, and municipal governments.

The PIC is designed to address stakeholders' primary concerns and includes sections such as an interactive map that allows users to search for their location relative to nearby pipelines as well as other mapping information; pipelines in the news which includes articles about local pipeline projects; and active pipeline projects which provides information on current pipeline projects proposed in Chester County.

A full site index is available and provides a quick overview of the site's extensive contents.