EXPLAINER | Delaware Watershed
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Delaware Watershed

The crew on the Drillboat Apache brings in lines tied to explosives used to break up rocks at the bottom of the Delaware River near Marcus Hook, Pennsylvania. It’s one of the final stages of a controversial project to deepen the river’s shipping channel.

Kimberly Paynter / WHYY

The crew on the Drillboat Apache brings in lines tied to explosives used to break up rocks at the bottom of the Delaware River near Marcus Hook, Pennsylvania. It’s one of the final stages of a controversial project to deepen the river’s shipping channel.

StateImpact Pennsylvania, Newsworks.org, WHYY and NJ Spotlight are collaborating on a series of stories about the Delaware River Watershed.

The watershed stretches from upstate New York through Pennsylvania and New Jersey, emptying out in the Delaware Bay. It supplies water to more than 15 million people, or about 5% of the nation’s population. Its natural lands both protect clean water and provide a habitat of regional and hemispheric importance.

The story of the river includes stories of its people and wildlife that depend on it for survival; the threats to continued sources of clean water; and the river as an economic engine.

The project is funded by The William Penn Foundation. Below are contributions from StateImpact Pennsylvania.

Latest stories


Wolf speaks to reporters after an event in Camp Hill on Nov. 13.

Wolf says he’s unaware of any wrongdoing in Mariner East pipeline permitting process

The FBI has reportedly opened a corruption investigation into the way the administration issued permits for the multibillion-dollar Mariner East 2.

By Katie Meyer

The Andover estate in Thornbury Township, Delaware County, along the route of the Mariner East 2 pipeline which began operating on Dec. 29. A valve site for the pipeline is in the center of the picture.

In this file photo, Mariner East 2 pipeline construction crews work in the backyards of homes on Lisa Drive in West Whiteland Township, Chester County, on May 2, 2018 after sinkholes opened in the area. That caused one of the ME2 project's many delays.
Updated: November 12, 2019 | 9:02 pm

Associated Press: FBI is investigating Wolf administration’s issuing of Mariner East pipeline permits

The Associated Press cites three sources who say FBI agents have interviewed current or former state employees in recent weeks about the Mariner East project and the construction permits.

By Staff

A basket of crabs caught on the Delaware bayshore.

A Mariner East pipeline valve site on the edge of the Andover development, Thornbury Township, Delaware County, illustrates the pipeline's path through densely-populated southeastern Pennsylvania.

Several Chester, Delaware county residents urge PUC judge to shut down Mariner East pipelines, citing fears of leak or explosion

Industry advocate calls hearings a ‘last-ditch effort’ to stop legally permitted project
By Jon Hurdle

On a tour of the energy facilities in Salem Township, Forbes Road Volunteer Fire Department Chief Bob Rosatti stops at a Mariner East 2 construction site. The Slickville Volunteer Fire Department would have jurisdiction over an incident here, but the Forbes Road department -- just six miles south -- would provide mutual aid, Rosatti said.

In court, seven people who live near Mariner East pipelines will urge a regulator to stop the project for good. It might be their last chance

Residents who assail Sunoco’s track record and its emergency plans are pitted against a company that admitted mistakes in construction yet says the project meets all state and federal requirements.

By Jon Hurdle

Refinery fire in South Philadelphia Friday January 21, 2019.
Updated: October 16, 2019 | 5:53 pm

Chemical Safety Board says PES refinery explosion ‘did not have to happen’

The report by the Chemical Safety Board shows for the first time that some amount of the dangerous hydrofluoric acid was released to the atmosphere
By Susan Phillips

Birds in the Delaware River watershed, like this great horned owl, are losing ground because of climate change impacts on habitat and food supply. (Emma Lee/WHYY)

Changing climate means Pennsylvania and New Jersey state birds could disappear from the region

A new report by the National Audubon Society says Pennsylvania's state bird the ruffed grouse and New Jersey's American goldfinch could disappear from the state.
By Susan Phillips

Detailed view on the newly installed system to filter out PFAS Forever Chemicals at Well #2 of the Horsham Water and Sewer Authority facility in Horsham, Pa., on August 22, 2019.

In this file photo, Mariner East 2 pipeline construction crews work in the backyards of homes on Lisa Drive in West Whiteland Township, Chester County, on May 2, 2018 after sinkholes opened in the area. That caused one of the ME2 project's many delays.

Sunoco still needs DEP approvals to restart pipeline work at Lisa Drive, Chester County

Lifting of injunction at sinkhole site isn’t final green light for Mariner East
By Jon Hurdle
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