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FRIENDS OF FRIENDS
 American Rivers
 Department of Natural Resources | Fall/Winter Newsletter
 Elkridge Furnace Inn
 Friends of Patapsco Valley and Heritage Greenway
 Green Hills Lawn Care
 Harkins Builders
 National Oceanic and Atmospheric Administration
 Slater Associates Inc.
Avalon Visitor's Center | 410-737 0451
Friends of Patapsco Valley State Park, Inc. | 8020 Baltimore National Pike, Ellicott City, MD 21043 | 410-737-0451
Patapsco Valley State Park | 8020 Baltimore National Pike Ellicott City, MD 21043 | 410-461-5005
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