Green Pond Marsh facts for kids
Green Pond Marsh is a special wetland area in Bethlehem Township, Pennsylvania. It's located about a quarter-mile south of U.S. Route 22, also known as the Lehigh Valley Thruway. Green Pond Road cuts right through the middle of the marsh. This marsh is separate from Green Pond, which is a permanent body of water nearby.
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What is Green Pond Marsh?
The southern part of Green Pond Marsh is a large area, about 68 acres (27.5 hectares), owned by the Green Pond Golf Course. This part of the marsh is mostly used for farming. The areas north of Green Pond Road are zoned for single-family homes.
A Look Back: History of the Marsh
Native American History
Long ago, the Lenni Lenape people, a Native American tribe, lived in eastern Pennsylvania, right around where Green Pond is today. This area was a very important place for them to meet, hunt, and fish.
People have found traces of the Lenni Lenape here. For example, an old grave, believed to be that of a Delaware chief, was found on a nearby farm. A tomahawk found close by seems to support this old story.
Since 1965, Barry Kresge, an archaeologist, has found many Lenni Lenape artifacts in the Green Pond Marsh area. These include parts of knives used by women to clean fish, arrowheads, spear points, and ax heads. Because of these important finds, he listed the property as a Pennsylvania Historical Site in 2005.
From Colonies to World War II
The Green Pond area was once part of a huge piece of land owned by Leticia Aubrey, who was the daughter of William Penn, the founder of Pennsylvania. Early maps show a pond called "Dry Lands Pond" in this area.
When settlers first arrived, they found thick forests around this pond. The land was called the "Dry Lands" because people thought it was too dry and barren for farming or living. But over time, it became some of the best farmland in the county! The pond and its wetlands were the only natural water source in that part of Bethlehem Township.
The name "Green Pond" might come from the green plants and trees around it, or from the green scum that sometimes forms on the pond's surface in dry weather. The pond was owned by William Penn's family until 1931, when it was sold to farmers. These farmers continued to work the land through World War II.
Modern Times: After World War II
After World War II, many parts of the original land were divided up for new developments. However, the largest and wettest part of the marsh is still used for agriculture today. This big 68-acre section is owned by Green Pond Golf Course, Inc., who bought it in 1979.
Why Green Pond Marsh is Important for Nature
A Home for Many Birds
Green Pond Marsh is a very important place for birds. The Pennsylvania Audubon Society has even named it an "Important Bird Area" (IBA). This means it provides essential habitat for many bird species.
Birdwatchers have spotted 161 different kinds of birds in the Green Pond Marsh area! Some of these are endangered species in Pennsylvania, like the American bittern, black-crowned night heron, black tern, blackpoll warbler, common tern, and great egret. Two species that are threatened in Pennsylvania, meaning their populations are declining, are the northern harrier and the osprey.
Becoming an Important Bird Area
The Green Pond Marsh was officially approved as an Important Bird Area on March 30, 2014. It met several important criteria:
- Unique Habitat: The marsh has shallow pools and open fields, which is a special combination that many birds need.
- Waterfowl Stopover: During their spring and fall migrations, more than 2,000 waterfowl (like ducks and geese) have been seen stopping at Green Pond Marsh at one time.
- Shorebird Stopover: More than 100 shorebirds (like sandpipers and plovers) have also been seen using the marsh during their migrations.
This makes Green Pond Marsh a crucial resting and feeding spot for thousands of birds traveling long distances.
The Ground Beneath the Marsh
Marsh Soils
The soil in Green Pond Marsh is made up of different types. Some areas have "Clarksburg Silt Loam," which means water moves slowly through it, and the water table (the level of water underground) is often high. Other areas have "Washington Silt Loam," where water moves moderately well, but there's a slight risk of groundwater pollution.
These soil types are important because they affect how water drains and how suitable the land is for different uses, like farming or building.
Karst Geology and Sinkholes
Green Pond Marsh is located in an area with "karst geology." This means the ground has limestone bedrock underneath that can dissolve over time when groundwater flows through it. This can create natural holes and depressions in the ground, sometimes called sinkholes.
Maps of the area show many surface depressions. In fact, a 2015 study found 13 sinkholes and 82 surface depressions within a half-mile of the marsh. Sinkholes can appear suddenly, especially when people build on karst areas that were once farmland. It's important to be aware of these risks when developing land in such areas.
Protecting the Marsh
The U.S. Army Corps of Engineers and the Pennsylvania Department of Environmental Protection visited Green Pond Marsh in November 2014 to study the wetlands. They found that nearly 5 acres of the land proposed for development was indeed a wetland. This means it's a protected area because wetlands are vital for the environment, helping to filter water and provide homes for wildlife.
