| River | County | Reach | Length (miles) | Description | Potential Classification | ORVs | Watershed (HUC Code 8) | Year Listed/ Updated | Other State |
|---|---|---|---|---|---|---|---|---|---|
| Antietam Creek | Washington | East of Artillary Dr. and Musket Ct. to confluence with Potomac River | 19 | Historic-(Segment includes National Historic Register Site of Antietam Battlefield.) | Historic | Conococheague-Opequon | 1982 | ||
| Battle Creek | Calvert | North of Route 506 to confluence with the Patuxent River | 5 | Part of the Chesapeake Bay-Rivers System. General-(The Chesapeake Bay-Rivers System is an excellent example of undeveloped rivers in a regionally unique estuarine area. The area in total is composed of several distinct subareas which in combination form a highly exemplary, productive and important river mouth estuarine system. The area is the most significant of 16 similar identified areas in the northeast.) Hydrologic-(System includes the largest bay and drowned river valley in the region. Circulation in the bay is controlled primarily by river flow and the resultant impact affects many of the organisms of the area. The area is over 195 miles long and 303 miles wide. Only 14 of the 50 major rivers which enter the bay are relatively undeveloped.) Botanic-(The system includes such river-related areas as the Battle Creek Cypress Swamp, a registered National Natural Landmark.) Fish-(The System is one of the most famous and productive seafood producing areas in the world.) Wildlife-(A significant part of the area is the focal point of the Atlantic flyway for migratory waterfowl, and about 30 species of ducks, geese, and swans concentrate there in winter.) Recreation-(The area has long been one of the most important and highly valued recreational fishing areas in the nation. The water of the Bay and its tributary river systems abound with a large number of fin fish-over 200 species-, including herring, shad, alewife, menbacker, white and yellow perch, etc. The System is accessible and in close proximity to high concentrations of urban populations in Baltimore, Maryland and Washington, D.C.) | Fish, Recreational, Wildlife, Other | Patuxent | 1982 | ||
| Big Annemessex River | Somerset | Route 413 to mouth at Chesapeake Bay | 9 | Part of the Chesapeake Bay-Rivers System. General-(The Chesapeake Bay-Rivers System is an excellent example of undeveloped rivers in a regionally unique estuarine area. The area in total is composed of several distinct subareas which in combination form a highly exemplary, productive and important river mouth estuarine system. The area is the most significant of 16 similar identified areas in the northeast.) Hydrologic-(System includes the largest bay and drowned river valley in the region. Circulation in the bay is controlled primarily by river flow and the resultant impact affects many of the organisms of the area. The area is over 195 miles long and 303 miles wide. Only 14 of the 50 major rivers which enter the bay are relatively undeveloped.) Botanic-(The system includes such river-related areas as the Battle Creek Cypress Swamp, a registered National Natural Landmark.) Fish-(The System is one of the most famous and productive seafood producing areas in the world.) Wildlife-(A significant part of the area is the focal point of the Atlantic flyway for migratory waterfowl, and about 30 species of ducks, geese, and swans concentrate there in winter.) Recreation-(The area has long been one of the most important and highly valued recreational fishing areas in the nation. The water of the Bay and its tributary river systems abound with a large number of fin fish-over 200 species-, including herring, shad, alewife, menbacker, white and yellow perch, etc. The System is accessible and in close proximity to high concentrations of urban populations in Baltimore, Maryland and Washington, D.C.) | Fish, Recreational, Wildlife, Other | Tangier | 1982 | ||
| Blackwater River | Dorchester | Headwaters to confluence with the Chesapeake Bay (Fishing Bay) | 26 | Part of the Chesapeake Bay-Rivers System. General-(The Chesapeake Bay-Rivers System is an excellent example of undeveloped rivers in a regionally unique estuarine area. The area in total is composed of several distinct subareas which in combination form a highly exemplary, productive and important river mouth estuarine system. The area is the most significant of 16 similar identified areas in the northeast.) Hydrologic-(System includes the largest bay and drowned river valley in the region. Circulation in the bay is controlled primarily by river flow and the resultant impact affects many of the organisms of the area. The area is over 195 miles long and 303 miles wide. Only 14 of the 50 major rivers which enter the bay are relatively undeveloped.) Botanic-(The system includes such river-related areas as the Battle Creek Cypress Swamp, a registered National Natural Landmark.) Fish-(The System is one of the most famous and productive seafood producing areas in the world.) Wildlife-(A significant part of the area is the focal point of the Atlantic flyway for migratory waterfowl, and about 30 species of ducks, geese, and swans concentrate there in winter.) Recreation-(The area has long been one of the most important and highly valued recreational fishing areas in the nation. The water of the Bay and its tributary river systems abound with a large number of fin fish-over 200 species-, including herring, shad, alewife, menbacker, white and yellow perch, etc. The System is accessible and in close proximity to high concentrations of urban populations in Baltimore, Maryland and Washington, D.C.) | Fish, Recreational, Wildlife, Other | Tangier | 1982 | ||
| Bohemia River | Cecil | Confluence with Great Bohemia Creek to confluence with Elk River | 5 | Historic-(Headwaters are the site of a colonial settlement including a National Historic Register Site of Old Bohemia Church.) Recreation-(Northernmost anchorage in the Chesapeake Bay for recreational sailing and boating in a natural, relatively undeveloped setting. In close proximity to urban populations at Newark, Wilmington and Baltimore.) | Historic, Recreational | Chester-Sassafras | 1982 | ||
| Bucklodge Branch | Montgomery | Headwaters to confluence with Seneca Creek | 7 | Historic-(Segment includes a portion of the Chesapeake and Ohio Canal, a National Historic Register site.) | Historic | Middle Potomac-Catoctin | 1982 | ||
| Catoctin Creek | Frederick | Headwaters to confluence with the Potomac River | 30 | Hydrologic-(One of the largest (in CFS) free-flowing, relatively undeveloped high order rivers in the northeast.) Scenic-(A wide variety of views related to stream channel variation, topographic variation and the variety of land uses and vegetative cover in the corridor.) | Scenic, Other | Middle Potomac-Catoctin | 1982 | ||
| Chester River | Kent, Queen Annes | Chestertown to confluence with the Chesapeake Bay (Narrows) | 28 | Part of the Chesapeake Bay-Rivers System. General-(The Chesapeake Bay-Rivers System is an excellent example of undeveloped rivers in a regionally unique estuarine area. The area in total is composed of several distinct subareas which in combination form a highly exemplary, productive and important river mouth estuarine system. The area is the most significant of 16 similar identified areas in the northeast.) Hydrologic-(System includes the largest bay and drowned river valley in the region. Circulation in the bay is controlled primarily by river flow and the resultant impact affects many of the organisms of the area. The area is over 195 miles long and 303 miles wide. Only 14 of the 50 major rivers which enter the bay are relatively undeveloped.) Botanic-(The system includes such river-related areas as the Battle Creek Cypress Swamp, a registered National Natural Landmark.) Fish-(The System is one of the most famous and productive seafood producing areas in the world.) Wildlife-(A significant part of the area is the focal point of the Atlantic flyway for migratory waterfowl, and about 30 species of ducks, geese, and swans concentrate there in winter.) Recreation-(The area has long been one of the most important and highly valued recreational fishing areas in the nation. The water of the Bay and its tributary river systems abound with a large number of fin fish-over 200 species-, including herring, shad, alewife, menbacker, white and yellow perch, etc. The System is accessible and in close proximity to high concentrations of urban populations in Baltimore, Maryland and Washington, D.C.) | Fish, Recreational, Wildlife, Other | Chester-Sassafras | 1982 | ||
| Chicamacomico River | Dorchester | Big Millpond Dam to confluence with the Transquaking River | 15 | Part of the Chesapeake Bay-Rivers System. General-(The Chesapeake Bay-Rivers System is an excellent example of undeveloped rivers in a regionally unique estuarine area. The area in total is composed of several distinct subareas which in combination form a highly exemplary, productive and important river mouth estuarine system. The area is the most significant of 16 similar identified areas in the northeast.) Hydrologic-(System includes the largest bay and drowned river valley in the region. Circulation in the bay is controlled primarily by river flow and the resultant impact affects many of the organisms of the area. The area is over 195 miles long and 303 miles wide. Only 14 of the 50 major rivers which enter the bay are relatively undeveloped.) Botanic-(The system includes such river-related areas as the Battle Creek Cypress Swamp, a registered National Natural Landmark.) Fish-(The System is one of the most famous and productive seafood producing areas in the world.) Wildlife-(A significant part of the area is the focal point of the Atlantic flyway for migratory waterfowl, and about 30 species of ducks, geese, and swans concentrate there in winter.) Recreation-(The area has long been one of the most important and highly valued recreational fishing areas in the nation. The water of the Bay and its tributary river systems abound with a large number of fin fish-over 200 species-, including herring, shad, alewife, menbacker, white and yellow perch, etc. The System is accessible and in close proximity to high concentrations of urban populations in Baltimore, Maryland and Washington, D.C.) | Fish, Recreational, Wildlife, Other | Tangier | 1982 | ||
| Choptank River | Caroline, Talbot, Dorchester | South of Denton to confluence with the Chesapeake Bay (Chancellor Point) | 46 | Part of the Chesapeake Bay-Rivers System. General-(The Chesapeake Bay-Rivers System is an excellent example of undeveloped rivers in a regionally unique estuarine area. The area in total is composed of several distinct subareas which in combination form a highly exemplary, productive and important river mouth estuarine system. The area is the most significant of 16 similar identified areas in the northeast.) Hydrologic-(System includes the largest bay and drowned river valley in the region. Circulation in the bay is controlled primarily by river flow and the resultant impact affects many of the organisms of the area. The area is over 195 miles long and 303 miles wide. Only 14 of the 50 major rivers which enter the bay are relatively undeveloped.) Botanic-(The system includes such river-related areas as the Battle Creek Cypress Swamp, a registered National Natural Landmark.) Fish-(The System is one of the most famous and productive seafood producing areas in the world.) Wildlife-(A significant part of the area is the focal point of the Atlantic flyway for migratory waterfowl, and about 30 species of ducks, geese, and swans concentrate there in winter.) Recreation-(The area has long been one of the most important and highly valued recreational fishing areas in the nation. The water of the Bay and its tributary river systems abound with a large number of fin fish-over 200 species-, including herring, shad, alewife, menbacker, white and yellow perch, etc. The System is accessible and in close proximity to high concentrations of urban populations in Baltimore, Maryland and Washington, D.C.) | Fish, Recreational, Wildlife, Other | Choptank | 1982 | ||
| Choptank River | Caroline | Greensboro to Denton | 9 | Historic-(Segment includes three National Historic Register Sites.) | Historic | Choptank | 1982 | ||
| Choptank River | Caroline | Confluence with Tidy Island Creek to Greensboro | 12 | Botanic-(76% of the segment is an extensive undeveloped freshwater river swamp in a predominantly agricultural region.) Archeologic-(Within corridor is the site of a buried forest estimated at 9,000 to 10,000 years of age which is believed to be the earliest appearance of Pleistocene oak forest in this region.) Historic-(Willow Grove, in the vicinity of Greensboro is on the National Register of Historic Places.) | Historic, Other | Choptank | 1982 | DE | |
| Conococheague Creek | Washington | Pennsylvania state line to above Conococheague | 13 | Cultural-(Segment includes an exceptional density and diversity of stone arch bridges.) | Cultural | Conococheague-Opequon | 1982 | ||
| Deer Creek | Harford, Baltimore, York | Headwaters in PA to confluence with Susquehanna River | 54 | Fish-(Habitat for rare and endangered Maryland darter.) Geologic-(Gorges rate to the section at Rocks State Park and east of Forge Hill Road.) Hydrologic-(Unique, sparsely developed, high order river segment. Susquehanna is the largest (in terms of cfs) river in the northeast.) | Fish, Geologic, Other | Lower Susquehanna | 1982 | PA | |
| Dividing Creek | Somerset, Worchester | North of Burk Mill Branch to confluence with Pocomoke River | 5 | Botanic-(One of the most extensive southern swamps at the northern extreme of its natural occurrence in the U.S. and also possesses an endemic plant.) Wildlife-(Seclusion of swamps and their juxtaposition with upland forests make this segment a significant wildlife habitat.) | Wildlife | Pokomoke-Western Lower Delmarva | 1982 | ||
| Fifteenmile Creek | Allegany | Route 40 to confluence with Potomac River | 10 | Geologic-(Stream course is unique in that it cuts through two ridges of the Appalachian mountain range rather than flowing with the strike of the ridge.) Historic-(Segment intersects the nationally significant Chesapeake and Ohio Canal, a National Historic Register Site.) | Geologic, Historic | Cacapon-Town | 1982 | ||
| Great Bohemia Creek | Cecil | Bohemia Mills to confluence with Bohemia River | 5 | Historic-(Headwaters are the site of a colonial settlement including a National Historic Register Site of Old Bohemia Church.) Recreation-(Northernmost anchorage in the Chesapeake Bay for recreational sailing and boating in a natural, relatively undeveloped setting. In close proximity to urban populations at Newark, Wilmington and Baltimore.) | Historic, Recreational | Chester-Sassafras | 1982 | ||
| Great Seneca Creek | Montgomery | Headwaters to confluence with Seneca Creek | 21 | Historic-(Segment includes a portion of the Chesapeake and Ohio Canal, a National Historic Register site.) | Historic | Middle Potomac-Catoctin | 1982 | ||
| Gunpowder Falls | Baltimore | Prettyboy Reservoir to Loch Raven Reservoir | 18 | Recreation-(Segment includes six miles of the North Central Trail, one of nine "Rails to Trails" projects approved nationwide.) | Recreational | Gunpowder-Patapsco | 1982 | ||
| Gunpowder Falls | Baltimore | Harford Road to Bel Air Road | 5 | Botanic-(Segment includes an excellent and significant example of mature upland hardwood forest.) | Other | Gunpowder-Patapsco | 1982 | ||
| Hill Top Fork | Charles | Nanjemoy Creek to northeast of Ironsides | 4 | Hydrologic-(The largest in CFS and width, free-flowing, relatively undeveloped, high order river in the entire northeast region.) Geologic-(Unique cliffs, bluffs and fossils at Pope's Creek. Unique features at Sim's Gorge.) Wildlife-(Unique occurrence of habitats of rare, endangered and unique birds, including bald eagles, herons, ospreys and egrets at Cedar Pt., Hilltop Fort, Smoot Tract and Taylor Neck.) Botanic-(Rare areas of plant diversity at Maryland Neck. Also spectacular old growth tulip poplar and oaks within Smoot Tract.) Historic-(Unique sunken fleet area within segment.) Recreation-(Area has been identified as the most exceptional area for forest game management on the entire lower Potomac.) | Geologic, Wildlife, Other | Lower Potomac | 1982 | ||
| Little Bohemia Creek | Cecil | Headwaters to confluence with Bohemia River and Great Bohemia Creek | 7 | Historic-(Headwaters are the site of a colonial settlement including a National Historic Register Site of Old Bohemia Church.) Recreation-(Northernmost anchorage in the Chesapeake Bay for recreational sailing and boating in a natural, relatively undeveloped setting. In close proximity to urban populations at Newark, Wilmington and Baltimore.) | Historic, Recreational | Chester-Sassafras | 1982 | ||
| Little Choptank River | Dorchester | Headwaters at confluence of Gary Creek and Lee Creek to confluence with the Chesapeake Bay | 7 | Part of the Chesapeake Bay-Rivers System. General-(The Chesapeake Bay-Rivers System is an excellent example of undeveloped rivers in a regionally unique estuarine area. The area in total is composed of several distinct subareas which in combination form a highly exemplary, productive and important river mouth estuarine system. The area is the most significant of 16 similar identified areas in the northeast.) Hydrologic-(System includes the largest bay and drowned river valley in the region. Circulation in the bay is controlled primarily by river flow and the resultant impact affects many of the organisms of the area. The area is over 195 miles long and 303 miles wide. Only 14 of the 50 major rivers which enter the bay are relatively undeveloped.) Botanic-(The system includes such river-related areas as the Battle Creek Cypress Swamp, a registered National Natural Landmark.) Fish-(The System is one of the most famous and productive seafood producing areas in the world.) Wildlife-(A significant part of the area is the focal point of the Atlantic flyway for migratory waterfowl, and about 30 species of ducks, geese, and swans concentrate there in winter.) Recreation-(The area has long been one of the most important and highly valued recreational fishing areas in the nation. The water of the Bay and its tributary river systems abound with a large number of fin fish-over 200 species-, including herring, shad, alewife, menbacker, white and yellow perch, etc. The System is accessible and in close proximity to high concentrations of urban populations in Baltimore, Maryland and Washington, D.C.) | Fish, Recreational, Wildlife, Other | Choptank | 1982 | ||
| Little Gunpowder Falls | Harford, Baltimore | Headwaters to I-95 | 22 | Cultural-(Segment includes regionally significant examples of vernacular architecture, and the only double gabled mill on the east coast.) | Cultural | Gunpowder-Patapsco | 1982 | ||
| Little North East Creek | Cecil | Route 273 to above I-95 | 6 | Geologic-(Segment includes Gilpin's Falls, an area of volcaniclastic rocks which represent the initial stages in formation of the Appalachians and mark the Fall Zone between Piedmont and Coastal Plains region.) | Geologic | Chester-Sassafras | 1982 | ||
| Long Green Creek | Harford | Headwaters to confluence with (Big) Gunpowder Falls | 6 | Other | Gunpowder-Patapsco | 1982 | |||
| Manokin River | Somerset | One mile below Route 13 to confluence with Tangier Sound. | 22 | Fish-Habitat for striped bass, recognized as threatened. Wildlife-Large wintering populations of black ducks, a declining species, mallard, bufflehead, and the Canadian goose. Botanic-70% of the corridor is wetlands. Includes habitat for the sensitive joint-vetch, a threatened species of national concern. | Scenic | Fish, Wildlife, Other | Tangier | 1995 | |
| Marshyhope Creek | Dorchester | South of Federalsburg to confluence with the Naticoke River | 16 | Part of the Chesapeake Bay-Rivers System. General-(The Chesapeake Bay-Rivers System is an excellent example of undeveloped rivers in a regionally unique estuarine area. The area in total is composed of several distinct subareas which in combination form a highly exemplary, productive and important river mouth estuarine system. The area is the most significant of 16 similar identified areas in the northeast.) Hydrologic-(System includes the largest bay and drowned river valley in the region. Circulation in the bay is controlled primarily by river flow and the resultant impact affects many of the organisms of the area. The area is over 195 miles long and 303 miles wide. Only 14 of the 50 major rivers which enter the bay are relatively undeveloped.) Botanic-(The system includes such river-related areas as the Battle Creek Cypress Swamp, a registered National Natural Landmark.) Fish-(The System is one of the most famous and productive seafood producing areas in the world.) Wildlife-(A significant part of the area is the focal point of the Atlantic flyway for migratory waterfowl, and about 30 species of ducks, geese, and swans concentrate there in winter.) Recreation-(The area has long been one of the most important and highly valued recreational fishing areas in the nation. The water of the Bay and its tributary river systems abound with a large number of fin fish-over 200 species-, including herring, shad, alewife, menbacker, white and yellow perch, etc. The System is accessible and in close proximity to high concentrations of urban populations in Baltimore, Maryland and Washington, D.C.) | Fish, Recreational, Wildlife, Other | Nanticoke | 1982 | ||
| Mason Branch | Talbot | From headwaters to confluence with Tuckahoe Creek | 14 | Part of the Chesapeake Bay-Rivers System. General-(The Chesapeake Bay-Rivers System is an excellent example of undeveloped rivers in a regionally unique estuarine area. The area in total is composed of several distinct subareas which in combination form a highly exemplary, productive and important river mouth estuarine system. The area is the most significant of 16 similar identified areas in the northeast.) Hydrologic-(System includes the largest bay and drowned river valley in the region. Circulation in the bay is controlled primarily by river flow and the resultant impact affects many of the organisms of the area. The area is over 195 miles long and 303 miles wide. Only 14 of the 50 major rivers which enter the bay are relatively undeveloped.) Botanic-(The system includes such river-related areas as the Battle Creek Cypress Swamp, a registered National Natural Landmark.) Fish-(The System is one of the most famous and productive seafood producing areas in the world.) Wildlife-(A significant part of the area is the focal point of the Atlantic flyway for migratory waterfowl, and about 30 species of ducks, geese, and swans concentrate there in winter.) Recreation-(The area has long been one of the most important and highly valued recreational fishing areas in the nation. The water of the Bay and its tributary river systems abound with a large number of fin fish-over 200 species-, including herring, shad, alewife, menbacker, white and yellow perch, etc. The System is accessible and in close proximity to high concentrations of urban populations in Baltimore, Maryland and Washington, D.C.) | Fish, Recreational, Wildlife, Other | Choptank | 1982 | ||
| Mattawoman Creek | Charles | Route 225 bridge (6 miles upstream of confluence) to confluence of the Mattawoman Creek and the Potomac River. From 38 33'30"/72 12'30" to 38 35'30"/77 07'30" | 8 | Recreation-About 80 fishing tournaments annually based in Smallwood State Park. Fish-Recent DNR monitoring indicates Mattawoman Creek has the highest fish species diversity of any (MD) river monitored. Other-Preservation of 3300 areas by the State protect Mattawoman Creek. Of these over 1000 acres are candidate State "Wildlands" which would prohibit structures, public roads or habitat disturbance. | Recreational | Fish, Recreational, Other | Lower Potomac | 1995 | |
| Monocacy River | Frederick, Carroll | Bridgeport to confluence with the Potomac River | 53 | Archeologic-(Plain, low fired pottery projectile points and turtle shells located within corridor.) | Other | Middle Potomac-Catoctin | 1982 | ||
| Nanjemoy Creek | Charles | South of Rt. 425 to confluence with Potomac | 11 | Hydrologic-(The largest in CFS and width, free-flowing, relatively undeveloped, high order river in the entire northeast region.) Geologic-(Unique cliffs, bluffs and fossils at Pope's Creek. Unique features at Sim's Gorge.) Wildlife-(Unique occurrence of habitats of rare, endangered and unique birds, including bald eagles, herons, ospreys and egrets at Cedar Pt., Hilltop Fort, Smoot Tract and Taylor Neck.) Botanic-(Rare areas of plant diversity at Maryland Neck. Also spectacular old growth tulip poplar and oaks within Smoot Tract.) Historic-(Unique sunken fleet area within segment.) Recreation-(Area has been identified as the most exceptional area for forest game management on the entire lower Potomac.) | Geologic, Wildlife, Other | Lower Potomac | 1982 | ||
| Nanticoke River | Dorchester, Sussex | From Bridgeville to Route 13 then from Seaford, DE to confluence with the Chesapeake Bay (Tangier Sound) | 52 | Part of the Chesapeake Bay-Rivers System. General-(The Chesapeake Bay-Rivers System is an excellent example of undeveloped rivers in a regionally unique estuarine area. The area in total is composed of several distinct subareas which in combination form a highly exemplary, productive and important river mouth estuarine system. The area is the most significant of 16 similar identified areas in the northeast.) Hydrologic-(System includes the largest bay and drowned river valley in the region. Circulation in the bay is controlled primarily by river flow and the resultant impact affects many of the organisms of the area. The area is over 195 miles long and 303 miles wide. Only 14 of the 50 major rivers which enter the bay are relatively undeveloped.) Botanic-(The system includes such river-related areas as the Battle Creek Cypress Swamp, a registered National Natural Landmark.) Fish-(The System is one of the most famous and productive seafood producing areas in the world.) Wildlife-(A significant part of the area is the focal point of the Atlantic flyway for migratory waterfowl, and about 30 species of ducks, geese, and swans concentrate there in winter.) Recreation-(The area has long been one of the most important and highly valued recreational fishing areas in the nation. The water of the Bay and its tributary river systems abound with a large number of fin fish-over 200 species-, including herring, shad, alewife, menbacker, white and yellow perch, etc. The System is accessible and in close proximity to high concentrations of urban populations in Baltimore, Maryland and Washington, D.C.) | Fish, Recreational, Wildlife, Other | Lower Chesapeake | 1982 | DE | |
| Patapsco River | Carroll, Howard | Confluence with South Branch Patapsco River to above Daniels | 6 | Cultural-(Earliest river in Maryland to become intensively developed for a diversity of industrial uses. River marked the path of the first public railroad in the United States, the Baltimore and Ohio, 1827.) Recreation-(Unique quickwater stream of Class I gradient with more challenging seasonal rapids within a natural setting in close proximity to Baltimore.) | Cultural, Recreational | Gunpowder-Patapsco | 1982 | ||
| Patapsco River, South Branch | Carroll, Howard | Below Sykesville to confluence with Patapsco River | 6 | Cultural-(Earliest river in Maryland to become intensively developed for a diversity of industrial uses. River marked the path of the first public railroad in the United States, the Baltimore and Ohio, 1827.) Recreation-(Unique quickwater stream of Class I gradient with more challenging seasonal rapids within a natural setting in close proximity to Baltimore.) | Cultural, Recreational | Gunpowder-Patapsco | 1982 | ||
| Patuxent River | St. Mary's, Calvert, Charles | South of Benedict to confluence with the Chesapeake Bay (Jack Bay) | 21 | Part of the Chesapeake Bay-Rivers System. General-(The Chesapeake Bay-Rivers System is an excellent example of undeveloped rivers in a regionally unique estuarine area. The area in total is composed of several distinct subareas which in combination form a highly exemplary, productive and important river mouth estuarine system. The area is the most significant of 16 similar identified areas in the northeast.) Hydrologic-(System includes the largest bay and drowned river valley in the region. Circulation in the bay is controlled primarily by river flow and the resultant impact affects many of the organisms of the area. The area is over 195 miles long and 303 miles wide. Only 14 of the 50 major rivers which enter the bay are relatively undeveloped.) Botanic-(The system includes such river-related areas as the Battle Creek Cypress Swamp, a registered National Natural Landmark.) Fish-(The System is one of the most famous and productive seafood producing areas in the world.) Wildlife-(A significant part of the area is the focal point of the Atlantic flyway for migratory waterfowl, and about 30 species of ducks, geese, and swans concentrate there in winter.) Recreation-(The area has long been one of the most important and highly valued recreational fishing areas in the nation. The water of the Bay and its tributary river systems abound with a large number of fin fish-over 200 species-, including herring, shad, alewife, menbacker, white and yellow perch, etc. The System is accessible and in close proximity to high concentrations of urban populations in Baltimore, Maryland and Washington, D.C.) | Fish, Recreational, Wildlife, Other | Upper Chesapeake Bay | 1982 | ||
| Pocomoke River | Wicomico, Worcester | Maryland border to confluence with Tilghman Race | 14 | Botanic-(One of the most extensive southern swamps at the northern extreme of its natural occurrence in the U.S. Area also includes the northernmost stands of Bald Cypress and regionally rare stands of Atlantic White Cedar.) Recreation-(Regionally unique canoe trail through extensive oxbow swamp.) | Recreational, Other | Pokomoke-Western Lower Delmarva | 1982 | ||
| Pocomoke River | Worcester | Confluence with Tilghman Race to north of Snow Hill | 9 | Botanic-(One of the most extensive southern swamps at the northern extreme of its natural occurrence in the U.S. and also possesses an endemic plant.) | Other | Pokomoke-Western Lower Delmarva | 1982 | ||
| Pocomoke River | Somerset, Worcester | Snow Hill to Pocomoke City | 15 | Botanic-(One of the most extensive southern swamps at the northern extreme of its natural occurrence in the U.S. and also possesses an endemic plant.) Wildlife-(Seclusion of swamps and their juxtaposition with upland forests make this segment a significant wildlife habitat.) | Other | Pokomoke-Western Lower Delmarva | 1982 | ||
| Pocomoke River | Worchester, Somerset | Pocomoke City to confluence with the Chesapeake Bay (Pocomoke Sound) | 16 | Part of the Chesapeake Bay-Rivers System. General-(The Chesapeake Bay-Rivers System is an excellent example of undeveloped rivers in a regionally unique estuarine area. The area in total is composed of several distinct subareas which in combination form a highly exemplary, productive and important river mouth estuarine system. The area is the most significant of 16 similar identified areas in the northeast.) Hydrologic-(System includes the largest bay and drowned river valley in the region. Circulation in the bay is controlled primarily by river flow and the resultant impact affects many of the organisms of the area. The area is over 195 miles long and 303 miles wide. Only 14 of the 50 major rivers which enter the bay are relatively undeveloped.) Botanic-(The system includes such river-related areas as the Battle Creek Cypress Swamp, a registered National Natural Landmark.) Fish-(The System is one of the most famous and productive seafood producing areas in the world.) Wildlife-(A significant part of the area is the focal point of the Atlantic flyway for migratory waterfowl, and about 30 species of ducks, geese, and swans concentrate there in winter.) Recreation-(The area has long been one of the most important and highly valued recreational fishing areas in the nation. The water of the Bay and its tributary river systems abound with a large number of fin fish-over 200 species-, including herring, shad, alewife, menbacker, white and yellow perch, etc. The System is accessible and in close proximity to high concentrations of urban populations in Baltimore, Maryland and Washington, D.C.) | Fish, Recreational, Wildlife, Other | Pokomoke-Western Lower Delmarva | 1982 | ||
| Pomonkey Creek | Charles | Fenwick Road bridge to confluence with Potomac River | 3 | Fish-The Pomonkey Creek, and the Mattawoman Creek, with the main stem of the Potomac between them, together make up the most important waterway habitat for the proliferation of the large mouth bass in the entire Potomac River Estuary. The Pomonkey is also the spawning grounds for the following: yellow and white perch, American shad, river herring, striped bass, and bay anchovy. Scenic-The Pomonkey Creek is nestled in a totally undeveloped pocket on the tidal Potomac River. The creek's surrounding landforms include hilly slopes and forested wetlands. It is virtually inaccessible by road and only two structures are sited along its banks--both at the creek's juncture with the Potomac. The creek's scenic, undeveloped landscape is even more remarkable due to its proximity to metropolitan Washington, DC. The Pomonkey Creek is also included in the National Wetlands Priority Conservation Plan. | Recreational | Fish, Scenic | Middle Potomac-Anacostia-Occoquan | 1995 | |
| Port Tobacco River | Charles | Confluence with Potomac River to Warehouse Point | 4 | Hydrologic-(The largest in CFS and width, free-flowing, relatively undeveloped, high order river in the entire northeast region.) Geologic-(Unique cliffs, bluffs and fossils at Pope's Creek. Unique features at Sim's Gorge.) Wildlife-(Unique occurrence of habitats of rare, endangered and unique birds, including bald eagles, herons, ospreys and egrets at Cedar Pt., Hilltop Fort, Smoot Tract and Taylor Neck.) Botanic-(Rare areas of plant diversity at Maryland Neck. Also spectacular old growth tulip poplar and oaks within Smoot Tract.) Historic-(Unique sunken fleet area within segment.) Recreation-(Area has been identified as the most exceptional area for forest game management on the entire lower Potomac.) | Geologic, Wildlife, Other | Lower Potomac | 1982 | ||
| Potomac River | Allegany, Washington | Oldtown, MD to Hancock, MD | 50 | Historic-(Segment parallels the Chesapeake and Ohio Canal National Historic Park. This area, a National Historic Register Site, is one of the least altered older canals.) Hydrologic-(One of the largest (in CFS), longest, free-flowing, sparsely developed remaining high order rivers in the section and province.) | Historic, Other | Cacapon-Town | 1982 | WV | |
| Potomac River | Frederick, Washington | Harpers Ferry to west of New Addition | 5 | Geologic-(River flows through a significant open low mountain at Weverton.) Hydrologic-(One of two remaining, relatively undeveloped, free-flowing high order river segments in the section.) | Geologic, Other | Cacapon-Town | 1982 | VA | |
| Potomac River | Fredick | R.R. yard at Brunswick near Monocacy River aqueduct | 12 | Hydrologic-(One of the largest (in CFS) free-flowing, relatively undeveloped high order rivers in the northeast.) Scenic-(A wide variety of views related to stream channel variation, topographic variation and the variety of land uses and vegetative cover in the corridor.) | Scenic, Other | Cacapon-Town | 1982 | VA | |
| Potomac River | Montgomery | North Mason Island to Broad Run | 11 | Scenic-(Significant and diverse juxtaposition and combination of land, land uses, water and vegetative elements.) Hydrologic-(One of the largest (in CFS) free-flowing, sparsely developed, remaining high-order rivers in the section.) | Scenic, Other | Cacapon-Town | 1982 | VA | |
| Potomac River | Montgomery | Broad Run to David Taylor Model Basin | 21 | Hydrologic-(One of the largest in CFS, free-flowing, relatively undeveloped high order rivers in the northeast.) Historic-(The linear and river related Chesapeake and Ohio National Historic Parks within and parallel to the river corridor.) Recreation-(Exceptional diversity of flow gradients. Proximity to urban populations in Washington, D.C., Arlington and Alexandria. Corridor contains areas for rock climbing.) Scenic-(Significant and diverse juxtaposition and combination of land, land uses, water and vegetative elements.) Geologic-(Rare gorges and cliffs up to 150 feet in height.) | Geologic, Historic, Recreational, Scenic, Other | Cacapon-Town | 1982 | VA | |
| Potomac River | Northumberland, Westmoreland, Prince George, Charles | Fort Washington Park to confluence with Chesapeake Bay | 107 | cenic-Scenic portions of the river appear similar to that in George Washington's time. Recreation-Following cleanup of Washington, D.C. pollution, boating opportunity has rebounded. Geologic-Cliffs (near Purse State Park for example) expose fossil-bearing strata. Fish-Recreational fishing has improved in recent years. Historic-Historic sites are scattered along the river. Cultural-Archaeological sites are known to be in various shore-line areas. | Recreational | Cultural, Fish, Geologic, Historic, Recreational, Scenic | Cacapon-Town | 1995 | VA |
| Sassafras River | Kent, Cecil, New Castle | Headwaters to confluence with the Chesapeake Bay | 22 | Hydrologic-(One of the largest (in CFS) free-flowing, relatively undeveloped high order rivers in the northeast.) Scenic-(A wide variety of views related to stream channel variation, topographic variation and the variety of land uses and vegetative cover in the corridor.) | Fish, Recreational, Wildlife, Other | Chester-Sassafras | 1982 | DE | |
| Seneca Creek | Montgomery | Headwaters to confluence with Potomac River | 7 | Historic-(Segment includes a portion of the Chesapeake and Ohio Canal, a National Historic Register site.) | Historic | Middle Potomac-Catoctin | 1982 | ||
| St. Mary's River | St. Mary's | Headwaters to Priests Point | 18 | Historic-(Segment includes National Historic Register district, St. Mary's City, the first colony in Maryland.) | Historic | Lower Potomac | 1982 | ||
| Susquehanna River | Harford | Confluence with Octoraro Creek to above Port Deposit | 4 | Fish-(Habitat for rare and endangered Maryland darter.) Geologic-(Gorges rate to the section at Rocks State Park and east of Forge Hill Road.) Hydrologic-(Unique, sparsely developed, high order river segment. Susquehanna is the largest (in terms of cfs) river in the northeast.) | Fish, Geologic, Other | Lower Susquehanna | 1982 | ||
| Sweathouse Branch | Harford | Headwaters to confluence with (Big) Gunpowder Falls | 2 | Other | Gunpowder-Patapsco | 1982 | |||
| Tidy Island Creek | Caroline | Headwaters at Marydel to confluence with Choptank River | 3 | Botanic-(76% of the segment is an extensive undeveloped freshwater river swamp in a predominantly agricultural region.) Archeologic-(Within corridor is the site of a buried forest estimated at 9,000 to 10,000 years of age which is believed to be the earliest appearance of Pleistocene oak forest in this region.) Historic-(Willow Grove, in the vicinity of Greensboro is on the National Register of Historic Places.) | Historic, Other | Choptank | 1982 | DE | |
| Transquaking River | Dorchester | Decoursey Bridge to confluence with the Chesapeake Bay (Fishing Bay) | 15 | Part of the Chesapeake Bay-Rivers System. General-(The Chesapeake Bay-Rivers System is an excellent example of undeveloped rivers in a regionally unique estuarine area. The area in total is composed of several distinct subareas which in combination form a highly exemplary, productive and important river mouth estuarine system. The area is the most significant of 16 similar identified areas in the northeast.) Hydrologic-(System includes the largest bay and drowned river valley in the region. Circulation in the bay is controlled primarily by river flow and the resultant impact affects many of the organisms of the area. The area is over 195 miles long and 303 miles wide. Only 14 of the 50 major rivers which enter the bay are relatively undeveloped.) Botanic-(The system includes such river-related areas as the Battle Creek Cypress Swamp, a registered National Natural Landmark.) Fish-(The System is one of the most famous and productive seafood producing areas in the world.) Wildlife-(A significant part of the area is the focal point of the Atlantic flyway for migratory waterfowl, and about 30 species of ducks, geese, and swans concentrate there in winter.) Recreation-(The area has long been one of the most important and highly valued recreational fishing areas in the nation. The water of the Bay and its tributary river systems abound with a large number of fin fish-over 200 species-, including herring, shad, alewife, menbacker, white and yellow perch, etc. The System is accessible and in close proximity to high concentrations of urban populations in Baltimore, Maryland and Washington, D.C.) | Fish, Recreational, Wildlife, Other | Tangier | 1982 | ||
| Tred Avon River | Talbot | Corporate limits of Easton to confluence with the Choptank River. | 13 | Recreation-Outstanding opportunities for recreational boating. Fish-Habitat for striped bass, a species of concern. | Recreational | Fish, Recreational, Wildlife | Choptank | 1995 | |
| Tuckahoe Creek | Talbot | From confleunce with Mason Branch to confluence with the Choptank River | 21 | Part of the Chesapeake Bay-Rivers System. General-(The Chesapeake Bay-Rivers System is an excellent example of undeveloped rivers in a regionally unique estuarine area. The area in total is composed of several distinct subareas which in combination form a highly exemplary, productive and important river mouth estuarine system. The area is the most significant of 16 similar identified areas in the northeast.) Hydrologic-(System includes the largest bay and drowned river valley in the region. Circulation in the bay is controlled primarily by river flow and the resultant impact affects many of the organisms of the area. The area is over 195 miles long and 303 miles wide. Only 14 of the 50 major rivers which enter the bay are relatively undeveloped.) Botanic-(The system includes such river-related areas as the Battle Creek Cypress Swamp, a registered National Natural Landmark.) Fish-(The System is one of the most famous and productive seafood producing areas in the world.) Wildlife-(A significant part of the area is the focal point of the Atlantic flyway for migratory waterfowl, and about 30 species of ducks, geese, and swans concentrate there in winter.) Recreation-(The area has long been one of the most important and highly valued recreational fishing areas in the nation. The water of the Bay and its tributary river systems abound with a large number of fin fish-over 200 species-, including herring, shad, alewife, menbacker, white and yellow perch, etc. The System is accessible and in close proximity to high concentrations of urban populations in Baltimore, Maryland and Washington, D.C.) | Fish, Recreational, Wildlife, Other | Choptank | 1982 | ||
| Wicomico Creek | Somerset, Wicomico | Dam near the town of Allen to confluence with the Wicomico River | 7 | Part of the Chesapeake Bay-Rivers System. General-(The Chesapeake Bay-Rivers System is an excellent example of undeveloped rivers in a regionally unique estuarine area. The area in total is composed of several distinct subareas which in combination form a highly exemplary, productive and important river mouth estuarine system. The area is the most significant of 16 similar identified areas in the northeast.) Hydrologic-(System includes the largest bay and drowned river valley in the region. Circulation in the bay is controlled primarily by river flow and the resultant impact affects many of the organisms of the area. The area is over 195 miles long and 303 miles wide. Only 14 of the 50 major rivers which enter the bay are relatively undeveloped.) Botanic-(The system includes such river-related areas as the Battle Creek Cypress Swamp, a registered National Natural Landmark.) Fish-(The System is one of the most famous and productive seafood producing areas in the world.) Wildlife-(A significant part of the area is the focal point of the Atlantic flyway for migratory waterfowl, and about 30 species of ducks, geese, and swans concentrate there in winter.) Recreation-(The area has long been one of the most important and highly valued recreational fishing areas in the nation. The water of the Bay and its tributary river systems abound with a large number of fin fish-over 200 species-, including herring, shad, alewife, menbacker, white and yellow perch, etc. The System is accessible and in close proximity to high concentrations of urban populations in Baltimore, Maryland and Washington, D.C.) | Fish, Recreational, Wildlife, Other | Tangier | 1982 | ||
| Wicomico River | Somerset, Wicomico | Salisbury to confluence with the Chesapeake Bay (Tangier Sound) | 21 | Part of the Chesapeake Bay-Rivers System. General-(The Chesapeake Bay-Rivers System is an excellent example of undeveloped rivers in a regionally unique estuarine area. The area in total is composed of several distinct subareas which in combination form a highly exemplary, productive and important river mouth estuarine system. The area is the most significant of 16 similar identified areas in the northeast.) Hydrologic-(System includes the largest bay and drowned river valley in the region. Circulation in the bay is controlled primarily by river flow and the resultant impact affects many of the organisms of the area. The area is over 195 miles long and 303 miles wide. Only 14 of the 50 major rivers which enter the bay are relatively undeveloped.) Botanic-(The system includes such river-related areas as the Battle Creek Cypress Swamp, a registered National Natural Landmark.) Fish-(The System is one of the most famous and productive seafood producing areas in the world.) Wildlife-(A significant part of the area is the focal point of the Atlantic flyway for migratory waterfowl, and about 30 species of ducks, geese, and swans concentrate there in winter.) Recreation-(The area has long been one of the most important and highly valued recreational fishing areas in the nation. The water of the Bay and its tributary river systems abound with a large number of fin fish-over 200 species-, including herring, shad, alewife, menbacker, white and yellow perch, etc. The System is accessible and in close proximity to high concentrations of urban populations in Baltimore, Maryland and Washington, D.C.) | Fish, Recreational, Wildlife, Other | Tangier | 1982 | ||
| Wicomico River | St. Mary's, Charles | Route 234 (Budds Creek Rd) down Allens Fresh to Cobb Island | 15 | Wildlife-(Segment includes nesting areas of the Bald Eagle, an endangered species, and also includes a Great Blue Heron Rookery.) | Wildlife | Tangier | 1982 | ||
| Wye East River | Queen Annes, Talbot | Wye Mills to confluence with the Wye River | 13 | Part of the Chesapeake Bay-Rivers System. General-(The Chesapeake Bay-Rivers System is an excellent example of undeveloped rivers in a regionally unique estuarine area. The area in total is composed of several distinct subareas which in combination form a highly exemplary, productive and important river mouth estuarine system. The area is the most significant of 16 similar identified areas in the northeast.) Hydrologic-(System includes the largest bay and drowned river valley in the region. Circulation in the bay is controlled primarily by river flow and the resultant impact affects many of the organisms of the area. The area is over 195 miles long and 303 miles wide. Only 14 of the 50 major rivers which enter the bay are relatively undeveloped.) Botanic-(The system includes such river-related areas as the Battle Creek Cypress Swamp, a registered National Natural Landmark.) Fish-(The System is one of the most famous and productive seafood producing areas in the world.) Wildlife-(A significant part of the area is the focal point of the Atlantic flyway for migratory waterfowl, and about 30 species of ducks, geese, and swans concentrate there in winter.) Recreation-(The area has long been one of the most important and highly valued recreational fishing areas in the nation. The water of the Bay and its tributary river systems abound with a large number of fin fish-over 200 species-, including herring, shad, alewife, menbacker, white and yellow perch, etc. The System is accessible and in close proximity to high concentrations of urban populations in Baltimore, Maryland and Washington, D.C.) | Fish, Recreational, Wildlife, Other | Chester-Sassafras | 1982 | ||
| Wye River | Queen Annes | US 50 to Confluence with the Chesapeake Bay | 13 | Part of the Chesapeake Bay-Rivers System. General-(The Chesapeake Bay-Rivers System is an excellent example of undeveloped rivers in a regionally unique estuarine area. The area in total is composed of several distinct subareas which in combination form a highly exemplary, productive and important river mouth estuarine system. The area is the most significant of 16 similar identified areas in the northeast.) Hydrologic-(System includes the largest bay and drowned river valley in the region. Circulation in the bay is controlled primarily by river flow and the resultant impact affects many of the organisms of the area. The area is over 195 miles long and 303 miles wide. Only 14 of the 50 major rivers which enter the bay are relatively undeveloped.) Botanic-(The system includes such river-related areas as the Battle Creek Cypress Swamp, a registered National Natural Landmark.) Fish-(The System is one of the most famous and productive seafood producing areas in the world.) Wildlife-(A significant part of the area is the focal point of the Atlantic flyway for migratory waterfowl, and about 30 species of ducks, geese, and swans concentrate there in winter.) Recreation-(The area has long been one of the most important and highly valued recreational fishing areas in the nation. The water of the Bay and its tributary river systems abound with a large number of fin fish-over 200 species-, including herring, shad, alewife, menbacker, white and yellow perch, etc. The System is accessible and in close proximity to high concentrations of urban populations in Baltimore, Maryland and Washington, D.C.) | Fish, Recreational, Wildlife, Other | Chester-Sassafras | 1982 | ||
| Youghiogheny River | Garrett | From Millers Run to the Southern Corporate limits of Friendsville | 19 | Recreation-Outstanding whitewater of Class IV and V rapids requiring experience and skill to navigate safely. Scenic-Most of the river flows through a narrow heavily forested gorge. Fish-Recent improvements in water quality have established excellent trout potential. Botanic-State naturalists have located over 31 sites within the river segment supporting plants or animals considered rare in the state. | Wild | Fish, Recreational, Scenic, Other | Youghiogheny | 1995 | |
| Zekiah Swamp Run | Charles, Prince Georges | Cedarville Rd to Allens Fresh Run | 22 | Geologic-(Segment is related to the Newburg Talbot Terrace Scarp, one of last remaining inland cliffs in this section.) Botanic-(Segment includes a National Natural Landmark, the extensive Zekiah Swamp, an excellent mixed stand of pin oak, sweet gum, and American holly.) | Geologic, Other | Lower Potomac | 1982 |
Last updated: November 30, 2016