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1. 104 State Water Plan Watersheds: Pennsylvania

1998. Environmental Resources Research Institute. Digitized boundaries of 104 major watersheds defined in the Pennsylvania state water plan. The State Water Plan, originally developed in the 1970s,...
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2. Active Railroads: Pennsylvania

1996. Environmental Resources Research Institute. Location of active rail lines in Pennsylvania, digitized from 1:24,000 USGS topographic maps on a stable Mylar base.
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4. Coal Mined Areas: Pennsylvania

1996. Environmental Resources Research Institute. Location of mined areas, including surface and deep coal and non-coal mining. Data incomplete, areas not mapped when screened at small scales durin...
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5. Inactive Railroads: Pennsylvania

1996. Environmental Resources Research Institute. Location of inactive rail lines in Pennsylvania, digitized from 1:24,000 USGS topographic maps on a stable Mylar base.
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6. Landmarks in Pennsylvania

1996. Environmental Resources Research Institute. National Park Service information used to establish landmark boundaries on 1:24,000 USGS topographic maps.
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7. Major River Basins: Pennsylvania

1998. Environmental Resources Research Institute. This polygon layer delineates the boundaries of 8 major watersheds in Pennsylvania that have shown through past vertebrate inventory collection rec...
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8. Major Rivers: Pennsylvania

1996. Environmental Resources Research Institute. Major rivers as derived from Pennsylvania Dept. of Transportation's streams database, which is organized by county.
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9. National Fish Hatcheries in Pennsylvania

1996. Environmental Resources Research Institute. Boundaries of fish hatcheries on 1:24,000 USGS topographic maps, locations verified from the National Park Service list.
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10. National forests in Pennsylvania

1996. Environmental Resources Research Institute. Boundary information from the office of the Allegheny National Forest, taken from 1:24,000 USGS topographic maps.
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11. National parks in Pennsylvania

1996. Environmental Resources Research Institute. National Park Service list and boundaries from 1:24,000 USGS topographic maps.
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12. National Wildlife Preserves in Pennsylvania

1996. Environmental Resources Research Institute. Boundaries of National Wildlife Preserves in Pennsylvania. Boundaries were provided by the United States Department of the Interior, National Fish ...
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13. Networked streams of Pennsylvania

1998. Environmental Resources Research Institute. The connected network of streams and waterways of Pennsylvania are indicated as single lines in this coverage. Waterways are given connected topolo...
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14. Oil And Gas Fields: Pennsylvania

1996. Environmental Resources Research Institute. Point locations of oil and gas fields from Pennsylvania Department of Environmental Resources, Bureau of Topographic and Geologic Survey /8PAGS/9 W...
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15. Oil And Gas Wells: Pennsylvania

1996. Environmental Resources Research Institute. Point locations of oil and gas wells from Pennsylvania Department of Environmental Resources, Bureau of Topographic and Geologic Survey /8PAGS/9 We...
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17. Small Watersheds: Pennsylvania

1997. Environmental Resources Research Institute. Boundaries of 9,895 watersheds in Pennsylvania indicated in the Pennsylvania gazetteer of streams. These boundaries enclose catchment areas for nam...
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26. Spring Creek Watershed soils: Pennsylvania

1996. Environmental Resources Research Institute. Soil types located in the Spring Creek Watershed. Taken from the Centre County soils classification.