In Philadelphia, conservationists are working to address a problem that has been building for decades at a freshwater tidal marsh, where years of dredging, land filling and the construction of dikes have interfered with the natural movement of water. Therefore, in an effort to bring the wetlands back to life, a major restoration project has begun to reconnect the marsh with a nearby creek through the excavation of thousands of feet of channels.According to Ducks Unlimited, in a report published on November 10, 2026, the restoration is taking place at Henderson Marsh, within the John Heinz National Wildlife Refuge at Tinicum in Philadelphia, Pennsylvania. With the objective of restoring nearly 150 acres of freshwater tidal marsh and excavating close to 13,000 linear feet of tidal channels, the idea is ultimately to allow water to move through the wetlands more naturally.Bringing a wetland back to lifeThe John Heinz National Wildlife Refuge is no ordinary patch of greenery surrounded by a city. Established in 1972, it is recognised as the first urban national wildlife refuge in the United States and protects the largest remaining freshwater tidal marsh in Pennsylvania. Located close to Philadelphia International Airport, the refuge provides an important natural space in a landscape that has otherwise experienced considerable development.However, like several wetlands situated near expanding urban areas, the marsh has…
A Philadelphia wetland damaged by old dikes and dredging is being reconnected to a creek
Restoration efforts have begun in the Henderson Marsh area at the John Heinz National Wildlife Refuge, focusing on the excavation of channels to facilitate better water flow. This initiative not only aims to boost wildlife habitats but also enhances flood resilience for nearby communities like Eastwick. The project's success relies on collaboration among various conservation groups, along with upgraded visitor…
In brief
In Philadelphia, conservationists are working to address a problem that has been building for decades at a freshwater tidal marsh, where years of dredging, land filling and the construction of dikes have interfered with the natural movement of water. Established in 1972, it is recognised as the first urban national wildlife refuge in the United States and protects the largest remaining freshwater tidal marsh in Pennsylvania.
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