Survey No.
Name (as assigned by HAER)
Status
Type[2]
Built
Documented
Carries
Crosses
Coordinates
DC-4
Potomac Aqueduct
Ruin
Queen post truss
1843
1983
Chesapeake and Ohio Canal
Potomac River
38°54′15″N 77°04′14″W / 38.90417°N 77.07056°W / 38.90417; -77.07056 (Potomac Aqueduct )
DC-6
Connecticut Avenue Bridge
Extant
Reinforced concrete open-spandrel arch
1907
1987
Connecticut Avenue , NW
Rock Creek and Beach Drive, NW
38°55′14″N 77°02′59″W / 38.92056°N 77.04972°W / 38.92056; -77.04972 (Connecticut Avenue Bridge )
DC-7
Arlington Memorial Bridge
Extant
Reinforced concrete closed-spandrel arch
1932
1988
Potomac River and George Washington Memorial Parkway northbound
38°53′14″N 77°03′20″W / 38.88722°N 77.05556°W / 38.88722; -77.05556 (Arlington Memorial Bridge )
DC-7-B
Arlington Memorial Bridge , Boundary Channel Extension
Extant
Reinforced concrete closed-spandrel arch
1932
1988
Memorial Avenue
Boundary Channel and George Washington Memorial Parkway southbound
38°53′07″N 77°03′41″W / 38.88528°N 77.06139°W / 38.88528; -77.06139 (Arlington Memorial Bridge, Boundary Channel Extension )
DC-9-A
Tidal Reservoir, Inlet Bridge
Extant
Reinforced concrete closed-spandrel arch
1909
1988
Ohio Drive , SW
Tidal Basin inlet
38°52′49″N 77°02′25″W / 38.88028°N 77.04028°W / 38.88028; -77.04028 (Tidal Reservoir, Inlet Bridge )
DC-9-B
Tidal Reservoir, Outlet
Extant
Stone arch
1889
1988
Pedestrian way adjacent to Ohio Drive , SW
Tidal Basin outlet
38°52′58″N 77°01′58″W / 38.88278°N 77.03278°W / 38.88278; -77.03278 (Tidal Reservoir, Outlet )
DC-10
Shoreham Hill Bridge
Extant
Reinforced concrete closed-spandrel arch
1938
1988
Rock Creek and Potomac Parkway
Rock Creek
38°55′12″N 77°03′10″W / 38.92000°N 77.05278°W / 38.92000; -77.05278 (Shoreham Hill Bridge )
DC-11
Rock Creek and Potomac Parkway Bridge near P Street
Extant
Reinforced concrete closed-spandrel arch
1936
1988
Rock Creek and Potomac Parkway
Rock Creek
38°54′36″N 77°03′01″W / 38.91000°N 77.05028°W / 38.91000; -77.05028 (Rock Creek and Potomac Parkway Bridge near P Street )
DC-12
Boulder Bridge
Extant
Reinforced concrete closed-spandrel arch
1902
1988
Beach Drive, NW
Rock Creek
38°56′54″N 77°02′42″W / 38.94833°N 77.04500°W / 38.94833; -77.04500 (Boulder Bridge )
DC-13
Ross Drive Bridge
Extant
Reinforced concrete open-spandrel arch
1907
1988
Ross Drive, NW
Tributary of Rock Creek
38°57′12″N 77°02′45″W / 38.95333°N 77.04583°W / 38.95333; -77.04583 (Ross Drive Bridge )
DC-14
Rapids Footbridge
Extant
Reinforced concrete open-spandrel arch
1934
1988
Trail in Rock Creek Park
Rock Creek
38°57′12″N 77°02′37″W / 38.95333°N 77.04361°W / 38.95333; -77.04361 (Rapids Footbridge )
DC-15
Pinehurst Bridge
Extant
Reinforced concrete open-spandrel arch
1911
1988
Beach Drive, NW
Pinehurst Branch
38°58′17″N 77°02′38″W / 38.971364°N 77.043774°W / 38.971364; -77.043774 (Pinehurst Bridge )
DC-16
South Waterside Drive Overpass
Extant
Reinforced concrete T-beam
1933
1988
Waterside Drive, NW, southbound
Rock Creek and Potomac Parkway northbound
38°54′49″N 77°03′18″W / 38.91361°N 77.05500°W / 38.91361; -77.05500 (South Waterside Drive Overpass )
DC-17
Grant Road Bridge
Extant
Stone arch
1898
1988
Grant Road, NW
Broad Branch
38°54′49″N 77°03′18″W / 38.91361°N 77.05500°W / 38.91361; -77.05500 (Grant Road Bridge )
DC-18
Old Military Road Bridge
Extant
Steel rolled multi-beam
1929
1988
Joyce Road, NW
Rock Creek
38°57′37″N 77°02′32″W / 38.96028°N 77.04222°W / 38.96028; -77.04222 (Old Military Road Bridge )
DC-19
Boundary Channel Bridge
Extant
Reinforced concrete girder
1932
1988
George Washington Memorial Parkway
Boundary Channel
38°52′31″N 77°02′49″W / 38.87528°N 77.04694°W / 38.87528; -77.04694 (Boundary Channel Bridge )
DC-20
K Street Bridge
Extant
Reinforced concrete rigid frame
1941
1992
K Street , NW
Rock Creek and Rock Creek and Potomac Parkway
38°54′09″N 77°03′28″W / 38.90250°N 77.05778°W / 38.90250; -77.05778 (K Street Bridge )
DC-21
Pennsylvania Avenue Bridge
Extant
Reinforced concrete closed-spandrel arch
1916
1992
Pennsylvania Avenue , NW
Rock Creek and Rock Creek and Potomac Parkway
38°54′17″N 77°03′22″W / 38.90472°N 77.05611°W / 38.90472; -77.05611 (Pennsylvania Avenue Bridge )
DC-22
Massachusetts Avenue Bridge
Extant
Reinforced concrete closed-spandrel arch
1939
1992
Massachusetts Avenue , NW
Rock Creek and Rock Creek and Potomac Parkway
38°55′04″N 77°03′30″W / 38.91778°N 77.05833°W / 38.91778; -77.05833 (Massachusetts Avenue Bridge )
DC-23
Calvert Street Bridge
Extant
Reinforced concrete closed-spandrel arch
1935
1992
Calvert Street, NW
Rock Creek and Beach Drive, NW
38°55′24″N 77°02′54″W / 38.92333°N 77.04833°W / 38.92333; -77.04833 (Calvert Street Bridge )
DC-24
Woodley Lane Bridge Abutment
Ruin
1889
1992
Belmont Road, NW
Rock Creek
38°55′17″N 77°02′59″W / 38.92139°N 77.04972°W / 38.92139; -77.04972 (Woodley Lane Bridge Abutment )
DC-25
Milkhouse Ford
Bypassed
Ford
1904
1992
Trail in Rock Creek Park
Rock Creek
38°57′53″N 77°02′51″W / 38.96472°N 77.04750°W / 38.96472; -77.04750 (Milkhouse Ford )
DC-26
Old Harvard Street Bridge
Extant
Reinforced concrete closed-spandrel arch
1901
1992
National Zoo Drive, NW
Rock Creek
38°55′39″N 77°02′41″W / 38.92750°N 77.04472°W / 38.92750; -77.04472 (Old Harvard Street Bridge )
DC-27
Connecticut Avenue Bridge, Spanning Klingle Valley
Extant
Steel arch
1932
1992
Connecticut Avenue , NW
Klingle Valley
38°55′56″N 77°03′24″W / 38.93222°N 77.05667°W / 38.93222; -77.05667 (Connecticut Avenue Bridge, Spanning Klingle Valley )
DC-28
Pierce Mill Bridge
Extant
Steel built-up girder
1895
1992
Tilden Street, NW
Rock Creek
38°56′23″N 77°03′06″W / 38.93972°N 77.05167°W / 38.93972; -77.05167 (Pierce Mill Bridge )
DC-29
Sixteenth Street Bridge
Extant
Reinforced concrete closed-spandrel arch
1910
1992
16th Street, NW
Piney Branch and Piney Branch Parkway, NW
38°56′18″N 77°02′11″W / 38.93833°N 77.03639°W / 38.93833; -77.03639 (Sixteenth Street Bridge )
DC-30
Morrow Drive Bridge
Extant
Reinforced concrete closed-spandrel arch
1911
1992
Morrow Drive, NW
Tributary of Rock Creek
38°57′34″N 77°02′19″W / 38.95944°N 77.03861°W / 38.95944; -77.03861 (Morrow Drive Bridge )
DC-31
Rolling Meadow Footbridge
Extant
Reinforced concrete closed-spandrel arch
1934
1992
Trail in Rock Creek Park
Rock Creek
38°58′13″N 77°02′41″W / 38.97028°N 77.04472°W / 38.97028; -77.04472 (Rolling Meadow Footbridge )
DC-32
Riley Springs Footbridge
Extant
Reinforced concrete closed-spandrel arch
1935
1992
Trail in Rock Creek Park
Rock Creek
38°58′41″N 77°02′36″W / 38.97806°N 77.04333°W / 38.97806; -77.04333 (Riley Springs Footbridge )
DC-33
Bluffs Footbridge
Extant
Reinforced concrete closed-spandrel arch
1934
1992
Trail in Rock Creek Park
Rock Creek
38°56′12″N 77°02′52″W / 38.93667°N 77.04778°W / 38.93667; -77.04778 (Bluffs Footbridge )
DC-34
Boundary Footbridge
Extant
Reinforced concrete closed-spandrel arch
1935
1992
Valley Trail
Rock Creek
38°59′13″N 77°03′08″W / 38.98694°N 77.05222°W / 38.98694; -77.05222 (Boundary Footbridge )
DC-35
Lyon's Mill Footbridge
Extant
Reinforced concrete closed-spandrel arch
1934
1992
Trail in Rock Creek Park
Rock Creek
38°54′45″N 77°03′15″W / 38.91250°N 77.05417°W / 38.91250; -77.05417 (Lyons Mill Footbridge )
DC-36
Saddle Club Footbridge
Extant
Reinforced concrete closed-spandrel arch
1934
1992
Trail in Rock Creek Park
Rock Creek
38°55′12″N 77°03′12″W / 38.92000°N 77.05333°W / 38.92000; -77.05333 (Saddle Club Footbridge )
DC-37
M Street Bridge
Extant
Steel built-up girder
1930
1992
M Street , NW
Rock Creek and Rock Creek and Potomac Parkway
38°54′19″N 77°03′20″W / 38.90528°N 77.05556°W / 38.90528; -77.05556 (M Street Bridge )
DC-38
Q Street Bridge
Extant
Reinforced concrete closed-spandrel arch
1915
1992
Q Street, NW
Rock Creek and Rock Creek and Potomac Parkway
38°54′39″N 77°03′04″W / 38.91083°N 77.05111°W / 38.91083; -77.05111 (Q Street Bridge )
DC-39
Little River Inlet Bridge
Extant
Steel built-up girder
1963
1994
George Washington Memorial Parkway
Boundary Channel
38°53′24″N 77°03′51″W / 38.89000°N 77.06417°W / 38.89000; -77.06417 (Little River Inlet Bridge )
DC-40
U.S. Route 50 Overpass, Westbound
Extant
Steel built-up girder
1946
1994
Ramp from George Washington Memorial Parkway northbound to US 50 (Arlington Boulevard) westbound
Boundary Channel and George Washington Memorial Parkway southbound
38°53′20″N 77°03′51″W / 38.88889°N 77.06417°W / 38.88889; -77.06417 (U.S. Route 50 Overpass, Westbound )
DC-41
Washington Boulevard Overpass
Extant
Reinforced concrete rigid frame
1942
1993
Washington Boulevard northbound
Ramp from Washington Boulevard southbound to George Washington Memorial Parkway southbound
38°52′57″N 77°03′27″W / 38.88250°N 77.05750°W / 38.88250; -77.05750 (Washington Boulevard Overpass )
DC-42
Washington Boulevard Bridge
Extant
Reinforced concrete closed-spandrel arch
1943
1994
SR 27 (Washington Boulevard )
Boundary Channel and George Washington Memorial Parkway southbound
38°52′50″N 77°03′26″W / 38.88056°N 77.05722°W / 38.88056; -77.05722 (Washington Boulevard Bridge )
DC-43
New Boundary Channel Bridge
Extant
Reinforced concrete box girder
1965
1994
George Washington Memorial Parkway southbound
Boundary Channel
38°52′51″N 77°03′32″W / 38.88083°N 77.05889°W / 38.88083; -77.05889 (New Boundary Channel Bridge )
DC-44
Mount Vernon Bike Trail Bridge
Extant
Steel built-up girder
1987
1994
Mount Vernon Trail
Boundary Channel
38°53′24″N 77°03′50″W / 38.89000°N 77.06389°W / 38.89000; -77.06389 (Mount Vernon Bike Trail Bridge )
DC-48
P Street Bridge
Extant
Reinforced concrete closed-spandrel arch
1935
1992
P Street , NW
Rock Creek and Rock Creek and Potomac Parkway
38°54′35″N 77°03′01″W / 38.90972°N 77.05028°W / 38.90972; -77.05028 (P Street Bridge )
DC-50
Long Bridge
Extant
Swing span
1903
1992
CSX Transportation and Amtrak
Potomac River
38°52′29″N 77°02′26″W / 38.87472°N 77.04056°W / 38.87472; -77.04056 (Long Bridge )
DC-51
Francis Scott Key Bridge
Extant
Reinforced concrete open-spandrel arch
1923
1992
US 29
Potomac River
38°54′08″N 77°04′13″W / 38.90222°N 77.07028°W / 38.90222; -77.07028 (Francis Scott Key Bridge )
DC-53
New Harvard Street Bridge
Extant
Reinforced concrete box girder
1965
1992
Harvard Street, NW
Rock Creek
38°55′41″N 77°02′40″W / 38.92806°N 77.04444°W / 38.92806; -77.04444 (New Harvard Street Bridge )