Survey No. |
Name (as assigned by HAER) |
Built |
Documented |
Carries |
Crosses |
Location |
County |
Coordinates |
MD-1 |
Baltimore & Ohio Railroad, Bollman Truss Bridge |
1835 |
1984 |
Former Baltimore and Ohio Railroad |
Little Patuxent River |
Savage |
Howard |
39°08′05″N 76°49′31″W / 39.13472°N 76.82528°W / 39.13472; -76.82528 (Baltimore & Ohio Railroad, Bollman Truss Bridge) |
MD-3 |
Baltimore & Ohio Railroad, Thomas Viaduct |
1835 |
1984 |
CSX Capital Subdivision |
Patapsco River |
Elkridge |
Howard |
39°13′18″N 76°42′48″W / 39.22167°N 76.71333°W / 39.22167; -76.71333 (Baltimore & Ohio Railroad, Thomas Viaduct) |
MD-5 |
Cumberland & Pennsylvania Railroad, Wills Creek Bridge (demolished) |
1860 |
1984 |
Former Cumberland and Pennsylvania Railroad |
Wills Creek |
Cumberland |
Allegany |
39°40′14″N 78°47′25″W / 39.67056°N 78.79028°W / 39.67056; -78.79028 (Cumberland & Pennsylvania Railroad, Wills Creek Bridge) |
MD-9 |
Baltimore & Ohio Railroad, Carrollton Viaduct |
1829 |
1984 |
CSX Baltimore Terminal Subdivision |
Gwynns Falls |
Baltimore |
Independent city |
39°16′32″N 76°39′18″W / 39.27556°N 76.65500°W / 39.27556; -76.65500 (Baltimore & Ohio Railroad, Carrollton Viaduct) |
MD-12 |
Baltimore & Ohio Railroad, Patterson Viaduct (replaced) |
1829 |
1970 |
Former Baltimore and Ohio Railroad |
Patapsco River |
Ilchester |
Howard |
39°14′56″N 76°45′53″W / 39.24889°N 76.76472°W / 39.24889; -76.76472 (Baltimore & Ohio Railroad, Patterson Viaduct) |
MD-16 |
Baltimore & Ohio Railroad, Harpers Ferry Bridge Piers |
1836 |
1970 |
Former Baltimore and Ohio Railroad |
Potomac River |
Maryland Heights, Maryland, and Harpers Ferry, West Virginia |
Washington County, Maryland, and Jefferson County, West Virginia |
39°19′25″N 77°43′38″W / 39.32361°N 77.72722°W / 39.32361; -77.72722 (Baltimore & Ohio Railroad, Harpers Ferry Bridge Piers) |
MD-22 |
Baltimore & Ohio Railroad, Waring Viaduct |
1906 |
1970 |
CSX Metropolitan Subdivision |
Great Seneca Creek |
Gaithersburg |
Montgomery |
39°09′32″N 77°14′53″W / 39.15889°N 77.24806°W / 39.15889; -77.24806 (Baltimore & Ohio Railroad, Waring Viaduct) |
MD-23 |
Potomac Edison Company, Chesapeake & Ohio Canal Bridge |
1923 |
1970 |
Potomac Edison Company siding |
Chesapeake and Ohio Canal |
Williamsport |
Washington |
39°35′59″N 77°49′36″W / 39.59972°N 77.82667°W / 39.59972; -77.82667 (Potomac Edison Company, Chesapeake & Ohio Canal Bridge) |
MD-24 |
Salisbury Street Bridge |
1879 |
1970 |
Salisbury Street |
Chesapeake and Ohio Canal |
Williamsport |
Washington |
39°35′57″N 77°49′35″W / 39.59917°N 77.82639°W / 39.59917; -77.82639 (Salisbury Street Bridge) |
MD-31 |
Chesapeake & Ohio Canal, Town Creek Aqueduct |
1849 |
1974 |
Chesapeake and Ohio Canal |
Town Creek |
Oldtown |
Allegany |
39°31′24″N 78°32′39″W / 39.52333°N 78.54417°W / 39.52333; -78.54417 (Chesapeake & Ohio Canal, Town Creek Aqueduct) |
MD-32 |
Chesapeake & Ohio Canal, Culvert 65 |
1832 |
1974 |
Chesapeake and Ohio Canal |
|
Dickerson |
Montgomery |
39°11′38″N 77°28′12″W / 39.19389°N 77.47000°W / 39.19389; -77.47000 (Chesapeake & Ohio Canal, Culvert 65) |
MD-35 |
Poffenberger Road Bridge |
1878 |
1983 |
Poffenberger Road |
Catoctin Creek |
Middletown |
Frederick |
39°22′54″N 77°34′18″W / 39.38167°N 77.57167°W / 39.38167; -77.57167 (Poffenberger Road Bridge) |
MD-36 |
Old Mill Road Bridge |
1882 |
1983 |
Old Mill Road |
Owens Creek |
Rocky Ridge |
Frederick |
39°36′07″N 77°20′19″W / 39.60194°N 77.33861°W / 39.60194; -77.33861 (Old Mill Road Bridge) |
MD-37 |
Baltimore & Ohio Railroad, Long Bridge |
1869 |
1983 |
Former Baltimore and Ohio Railroad |
Antietam Creek |
Keedysville |
Washington |
39°30′15″N 77°42′49″W / 39.50417°N 77.71361°W / 39.50417; -77.71361 (Baltimore & Ohio Railroad, Long Bridge) |
MD-40 |
Keysville-Frederick County Road Bridge |
1873 |
|
Keysville-Frederick County Road |
Monocacy River |
Keymar |
Carroll |
39°39′16″N 77°16′01″W / 39.65444°N 77.26694°W / 39.65444; -77.26694 (Keysville-Frederick County Road Bridge) |
MD-41 |
National Road, Wilson Bridge |
1819 |
1982 |
National Road |
Conococheague Creek |
Hagerstown |
Washington |
39°39′27″N 77°50′53″W / 39.65750°N 77.84806°W / 39.65750; -77.84806 (National Road, Wilson Bridge) |
MD-44 |
Post Road Bridge |
1905 |
1984 |
MD 7A |
Northeast Corridor |
Havre de Grace |
Harford |
39°32′11″N 76°06′49″W / 39.53639°N 76.11361°W / 39.53639; -76.11361 (Post Road Bridge) |
MD-46 |
Susquehanna River Bridge |
1908 |
1984 |
CSX Philadelphia Subdivision |
Susquehanna River |
Havre de Grace and Perryville |
Harford and Cecil |
39°34′08″N 76°05′13″W / 39.56889°N 76.08694°W / 39.56889; -76.08694 (Susquehanna River Bridge) |
MD-52 |
Sharptown Bridge (replaced) |
1912 |
1987 |
MD 313 |
Nanticoke River |
Sharptown |
Wicomico |
38°32′45″N 75°43′10″W / 38.54583°N 75.71944°W / 38.54583; -75.71944 (Sharptown Bridge) |
MD-53 |
Cabin John Aqueduct Bridge |
1863 |
1987 |
MacArthur Boulevard and Washington Aqueduct |
Cabin John Creek |
Cabin John |
Montgomery |
38°58′22″N 77°08′53″W / 38.97278°N 77.14806°W / 38.97278; -77.14806 (Cabin John Aqueduct Bridge) |
MD-68 |
Matthews Bridge |
1914 |
1978 |
MD 146 (Dulaney Valley Road) |
Loch Raven Reservoir |
Baltimore |
Baltimore |
39°27′46″N 76°34′50″W / 39.46278°N 76.58056°W / 39.46278; -76.58056 (Matthews Bridge) |
MD-69 |
Chesapeake & Ohio Canal, White's Ferry Iron Bridge |
1865 |
1988 |
White's Ferry Road |
Chesapeake and Ohio Canal |
Dickerson |
Montgomery |
39°09′17″N 77°31′02″W / 39.15472°N 77.51722°W / 39.15472; -77.51722 (Chesapeake & Ohio Canal, White's Ferry Iron Bridge) |
MD-70 |
Chesapeake & Ohio Canal, Iron Bridge at Lock No. 68 |
1910 |
1988 |
|
Chesapeake and Ohio Canal |
Oldtown |
Allegany |
39°31′50″N 78°35′17″W / 39.53056°N 78.58806°W / 39.53056; -78.58806 (Chesapeake & Ohio Canal, Iron Bridge at Lock No. 68) |
MD-71 |
Chesapeake & Ohio Canal, McCoy's Ferry Road Culvert |
1840 |
1988 |
McCoy's Ferry Road |
Chesapeake and Ohio Canal |
Big Spring |
Washington |
39°36′31″N 77°58′12″W / 39.60861°N 77.97000°W / 39.60861; -77.97000 (Chesapeake & Ohio Canal, McCoy's Ferry Road Culvert) |
MD-72 |
Chesapeake & Ohio Canal, Prather's Neck Road Culvert |
1840 |
1988 |
Chesapeake and Ohio Canal |
Neck Road |
Big Spring |
Washington |
|
MD-79 |
Mitchell's Mill Bridge (relocated) |
1885 |
1990 |
Carrs Mill Road |
Winter's Run |
Bel Air |
Harford |
39°32′06″N 76°24′02″W / 39.53500°N 76.40056°W / 39.53500; -76.40056 (Mitchell's Mill Bridge) |
MD-82 |
Stauffer Road Bridge (relocated) |
1930 |
1996 |
Stauffer Road |
Israel Creek |
Walkersville |
Frederick |
39°28′01″N 77°20′45″W / 39.46694°N 77.34583°W / 39.46694; -77.34583 (Stauffer Road Bridge) |
MD-83 |
Waverly Street Bridge |
1892 |
1991 |
Waverly Street |
George's Creek |
Westernport |
Allegany |
39°29′23″N 79°02′34″W / 39.48972°N 79.04278°W / 39.48972; -79.04278 (Waverly Street Bridge) |
MD-85 |
Governor's Bridge |
1912 |
1992 |
Governor's Bridge Road |
Patuxent River |
Bowie |
Prince George's and Anne Arundel |
38°57′05″N 76°41′36″W / 38.95139°N 76.69333°W / 38.95139; -76.69333 (Governor's Bridge) |
MD-88 |
Glendale Road Bridge (demolished) |
1924 |
1992 |
Glendale Road |
Deep Creek Lake |
McHenry |
Garrett |
39°30′20″N 79°18′39″W / 39.50556°N 79.31083°W / 39.50556; -79.31083 (Glendale Road Bridge) |
MD-89 |
Hagerstown Road Bridge (relocated) |
1920 |
1993 |
Old Hagerstown Road |
Little Catoctin Creek |
Middletown |
Frederick |
39°27′13″N 77°33′36″W / 39.45361°N 77.56000°W / 39.45361; -77.56000 (Hagerstown Road Bridge) |
MD-90 |
Crum Road Bridge |
1890 |
1993 |
Crum Road |
Israel Creek |
Walkersville |
Frederick |
39°28′47″N 77°19′39″W / 39.47972°N 77.32750°W / 39.47972; -77.32750 (Crum Road Bridge) |
MD-92 |
Carderock Overpass |
1962 |
|
Carderock Access Road |
Clara Barton Parkway |
Carderock |
Montgomery |
38°58′21″N 77°11′45″W / 38.97250°N 77.19583°W / 38.97250; -77.19583 (Carderock Overpass) |
MD-93 |
Seventy-Ninth Street Cabin John Underpass |
1961 |
|
Clara Barton Parkway |
79th Street |
Cabin John |
Montgomery |
38°58′22″N 77°09′53″W / 38.97278°N 77.16472°W / 38.97278; -77.16472 (Seventy-Ninth Street Cabin John Underpass) |
MD-94 |
Cabin John Overpass |
1962 |
|
Erricson Road |
Clara Barton Parkway |
Cabin John |
Montgomery |
38°58′16″N 77°09′10″W / 38.97111°N 77.15278°W / 38.97111; -77.15278 (Cabin John Overpass) |
MD-95 |
Cabin John Creek Bridge |
1963 |
|
Clara Barton Parkway |
Cabin John Creek |
Cabin John |
Montgomery |
38°58′16″N 77°08′52″W / 38.97111°N 77.14778°W / 38.97111; -77.14778 (Cabin John Creek Bridge) |
MD-96 |
George Washington Memorial Parkway Northbound Lane Overpass |
1961 |
|
Future George Washington Memorial Parkway |
Clara Barton Parkway |
Glen Echo |
Montgomery |
38°57′46″N 77°08′09″W / 38.96278°N 77.13583°W / 38.96278; -77.13583 (George Washington Memorial Parkway Northbound Lane Overpass) |
MD-97 |
Sycamore Island Pedestrian Overpass |
1968 |
|
Trail to Sycamore Island |
Clara Barton Parkway |
Cabin John |
Montgomery |
38°57′31″N 77°07′54″W / 38.95861°N 77.13167°W / 38.95861; -77.13167 (Sycamore Island Pedestrian Overpass) |
MD-98 |
Brookmont Pedestrian Overpass |
1967 |
|
Brookmont pedestrian crossing |
Clara Barton Parkway |
Glen Echo |
Montgomery |
38°56′22″N 77°07′14″W / 38.93944°N 77.12056°W / 38.93944; -77.12056 (Brookmont Pedestrian Overpass) |
MD-99 |
Little Falls Branch Bridge |
1961 |
|
Clara Barton Parkway |
Little Falls Branch |
Glen Echo |
Montgomery |
38°56′15″N 77°07′03″W / 38.93750°N 77.11750°W / 38.93750; -77.11750 (Little Falls Branch Bridge) |
MD-100-A |
Suitland Parkway, Henson Creek Culvert Headwalls at Station 200 Plus 35 |
1944 |
|
Suitland Parkway |
Henson Creek |
Suitland |
Prince George's |
38°50′10″N 76°53′59″W / 38.83611°N 76.89972°W / 38.83611; -76.89972 (Suitland Parkway, Henson Creek Culvert Headwalls at Station 200 Plus 35) |
MD-100-B |
Suitland Parkway, Henson Creek Culvert Headwalls at Station 274 Plus 50 |
1944 |
|
Suitland Parkway |
Henson Creek |
Suitland |
Prince George's |
38°49′51″N 76°52′30″W / 38.83083°N 76.87500°W / 38.83083; -76.87500 (Suitland Parkway, Henson Creek Culvert Headwalls at Station 274 Plus 50) |
MD-106 |
Wilson Mill Bridge |
1930 |
1994 |
MD 161 |
Deer Creek |
Darlington |
Harford |
39°37′01″N 76°12′04″W / 39.61694°N 76.20111°W / 39.61694; -76.20111 (Wilson Mill Bridge) |
MD-108 |
Tilghman Island Bridge (relocated) |
1934 |
1998 |
Chesapeake Bay Maritime Museum grounds |
Perry Cabin Lane |
Saint Michaels |
Talbot |
38°47′19″N 76°13′28″W / 38.78861°N 76.22444°W / 38.78861; -76.22444 (Tilghman Island Bridge)\ |
MD-109 |
Proenty Road Bridge |
1926 |
1994 |
Proenty Road |
Jennings Run |
Corriganville |
Allegany |
39°41′29″N 78°48′13″W / 39.69139°N 78.80361°W / 39.69139; -78.80361 (Proenty Road Bridge) |
MD-110 |
Boston Street Bridge |
1902 |
1994 |
Boston Street |
Harris Creek Sewer |
Baltimore |
Baltimore |
39°16′49″N 76°34′48″W / 39.28028°N 76.58000°W / 39.28028; -76.58000 (Boston Street Bridge) |
MD-112 |
Weems Creek Bridge (replaced) |
1929 |
1995 |
MD 436 |
Weems Creek |
Annapolis |
Anne Arundel |
38°59′34″N 76°30′28″W / 38.99278°N 76.50778°W / 38.99278; -76.50778 (Weems Creek Bridge) |
MD-115 |
Western Maryland Railway Bridge (demolished) |
1932 |
1995 |
Western Maryland Railway |
MD 51 |
Spring Gap |
Allegany |
39°33′52″N 78°42′48″W / 39.56444°N 78.71333°W / 39.56444; -78.71333 (Western Maryland Railway Bridge) |
MD-119 |
River Road Bridge (replaced) |
1884 |
1993 |
Casselman River Road |
Casselman River |
Grantsville |
Garrett |
39°42′07″N 79°08′12″W / 39.70194°N 79.13667°W / 39.70194; -79.13667 (River Road Bridge) |
MD-120 |
Harmony Road Bridge (replaced) |
1918 |
1996 |
Harmony Road |
Little Catoctin Creek |
Myersville |
Frederick |
39°28′56″N 77°32′06″W / 39.48222°N 77.53500°W / 39.48222; -77.53500 (Harmony Road Bridge) |
MD-123 |
Chesapeake & Ohio Canal, Conococheague Creek Aqueduct |
1834 |
1996 |
Chesapeake and Ohio Canal |
Conococheague Creek |
Williamsport |
Washington |
39°36′05″N 77°49′41″W / 39.60139°N 77.82806°W / 39.60139; -77.82806 (Chesapeake & Ohio Canal, Conococheague Creek Aqueduct) |
MD-124 |
Allender Road Bridge (replaced) |
1945 |
1997 |
Allender Road |
CSX Philadelphia Subdivision |
White Marsh |
Baltimore |
39°24′03″N 76°24′25″W / 39.40083°N 76.40694°W / 39.40083; -76.40694 (Allender Road Bridge) |
MD-125 |
Flintville Bridge (replaced) |
1927 |
1998 |
MD 623 (Flintville Road) |
Broad Creek |
Castleton |
Harford |
39°41′46″N 76°14′41″W / 39.69611°N 76.24472°W / 39.69611; -76.24472 (Flintville Bridge) |
MD-127 |
Clarysville Bridge |
1812 |
1994 |
National Road |
Braddock Run |
Clarysville |
Allegany |
39°38′35″N 78°53′21″W / 39.64306°N 78.88917°W / 39.64306; -78.88917 (Clarysville Bridge) |
MD-128 |
Little Crossings Bridge |
1813 |
1993 |
National Road |
Casselman River |
Grantsville |
Garrett |
39°41′48″N 79°08′37″W / 39.69667°N 79.14361°W / 39.69667; -79.14361 (Little Crossings Bridge) |
MD-170 |
Bollman Truss Bridge |
|
2007 |
|
|
Westminster |
Carroll |
|
MD-174 |
Gilpin's Falls Covered Bridge |
1860 |
2012 |
Former MD 272 (North East Road) |
North East Creek |
North East |
Cecil |
39°38′56″N 75°57′20″W / 39.64889°N 75.95556°W / 39.64889; -75.95556 (Gilpin's Falls Covered Bridge) |
WV-36 |
Baltimore & Ohio Railroad, Bollman Bridge |
1868 |
1987 |
Former Baltimore and Ohio Railroad |
Potomac River |
Maryland Heights, Maryland, and Harpers Ferry, West Virginia |
Washington County, Maryland, and Jefferson County, West Virginia |
39°19′27″N 77°43′43″W / 39.32417°N 77.72861°W / 39.32417; -77.72861 (Baltimore & Ohio Railroad, Bollman Bridge) |