# List of bridges documented by the Historic American Engineering Record in Maryland

This is a list of bridges documented by the Historic American Engineering Record in the US state of Maryland.

## Bridges

| Survey No. | Name (as assigned by HAER) | Status | Type | Built | Documented | Carries | Crosses | Location | County | Coordinates |
| MD-1 | Baltimore and Ohio Railroad, Bollman Truss Bridge | Extant | Bollman truss | 1835 | 1984 | Baltimore and Ohio Railroad (former) | Little Patuxent River | Savage | Howard | 39°08′05″N 76°49′31″W﻿ / ﻿39.13472°N 76.82528°W﻿ / 39.13472; -76.82528﻿ (Baltimore and Ohio Railroad, Bollman Truss Bridge) |
| MD-3 | Baltimore and Ohio Railroad, Thomas Viaduct | Extant | Stone arch | 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 and Ohio Railroad, Thomas Viaduct) |
| MD-5 | Cumberland and Pennsylvania Railroad, Wills Creek Bridge | Demolished | Brick arch | 1860 | 1984 | Cumberland and Pennsylvania Railroad (former) | Wills Creek | Cumberland | Allegany | 39°40′14″N 78°47′25″W﻿ / ﻿39.67056°N 78.79028°W﻿ / 39.67056; -78.79028﻿ (Cumberland and Pennsylvania Railroad, Wills Creek Bridge) |
| MD-9 | Baltimore and Ohio Railroad, Carrollton Viaduct | Extant | Stone arch | 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 and Ohio Railroad, Carrollton Viaduct) |
| MD-12 | Baltimore and Ohio Railroad, Patterson Viaduct | Ruin | Stone arch | 1829 | 1970 | Baltimore and Ohio Railroad (former) | Patapsco River | Ilchester | Howard | 39°14′56″N 76°45′53″W﻿ / ﻿39.24889°N 76.76472°W﻿ / 39.24889; -76.76472﻿ (Baltimore and Ohio Railroad, Patterson Viaduct) |
| MD-16 | Baltimore and Ohio Railroad, Harpers Ferry Bridge Piers | Ruin | | 1836 | 1970 | Baltimore and Ohio Railroad (former) | 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 and Ohio Railroad, Harpers Ferry Bridge Piers) |
| MD-22 | Baltimore and Ohio Railroad, Waring Viaduct | Extant | Stone arch | 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 and Ohio Railroad, Waring Viaduct) |
| MD-23 | Potomac Edison Company, Chesapeake and Ohio Canal Bridge | Extant | Vertical-lift 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 and Ohio Canal Bridge) |
| MD-24 | Salisbury Street Bridge | Extant | Pratt truss | 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 and Ohio Canal, Town Creek Aqueduct | Extant | Stone arch | 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 and Ohio Canal, Town Creek Aqueduct) |
| MD-32 | Chesapeake and Ohio Canal, Culvert 65 | Extant | Stone arch | 1832 | 1974 | Chesapeake and Ohio Canal | Unnamed stream | Dickerson | Montgomery | 39°11′38″N 77°28′12″W﻿ / ﻿39.19389°N 77.47000°W﻿ / 39.19389; -77.47000﻿ (Chesapeake and Ohio Canal, Culvert 65) |
| MD-35 | Poffenberger Road Bridge | Extant | Whipple truss | 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 | Extant | Pratt truss | 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 and Ohio Railroad, Long Bridge | Demolished | Trestle | 1869 | 1983 | Baltimore and Ohio Railroad (former) | Antietam Creek | Keedysville | Washington | 39°30′15″N 77°42′49″W﻿ / ﻿39.50417°N 77.71361°W﻿ / 39.50417; -77.71361﻿ (Baltimore and Ohio Railroad, Long Bridge) |
| MD-40 | Keysville-Frederick County Road Bridge | Replaced | | 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 | Extant | Stone arch | 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 | Replaced | Baltimore truss | 1905 | 1984 | MD 7 | 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 | Extant | Pennsylvania truss | 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 | Swing span | 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 | Extant | Stone arch | 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 | Replaced | Pennsylvania truss | 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 and Ohio Canal, White's Ferry Iron Bridge | Abandoned | Warren truss | 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 and Ohio Canal, White's Ferry Iron Bridge) |
| MD-70 | Chesapeake and Ohio Canal, Iron Bridge at Lock No. 68 | Abandoned | Warren truss | 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 and Ohio Canal, Iron Bridge at Lock No. 68) |
| MD-71 | Chesapeake and Ohio Canal, McCoy's Ferry Road Culvert | Extant | Stone arch | 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 and Ohio Canal, McCoy's Ferry Road Culvert) |
| MD-72 | Chesapeake and Ohio Canal, Prather's Neck Road Culvert | Extant | Stone arch | 1840 | 1988 | Chesapeake and Ohio Canal | Neck Road | Big Spring | Washington | |
| MD-79 | Mitchell's Mill Bridge | Relocated | Pratt truss | 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 | Pratt truss | 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 | Replaced | Bowstring arch truss | 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 | Extant | Pratt truss | 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 | Pennsylvania truss | 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 | Pratt truss | 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 | Relocated | Bowstring arch truss | 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 | Exant | Prestressed concrete girder | 1962 | 1994 | 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 | Extant | Reinforced concrete rigid frame | 1961 | 1994 | 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 | Extant | Prestressed concrete girder | 1962 | 1994 | 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 | Extant | Reinforced concrete box girder | 1963 | 1994 | 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 | Extant | Reinforced concrete rigid frame | 1961 | 1994 | 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 | Extant | Reinforced concrete box girder | 1968 | 1994 | 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 | Extant | Reinforced concrete box girder | 1967 | 1994 | 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 | Extant | Prestressed concrete girder | 1961 | 1994 | 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 | Extant | Culvert | 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 | Extant | Culvert | 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 | Replaced | Parker truss | 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 | Rolling lift (Scherzer) bascule | 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 | Replaced | Pratt truss | 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 | Extant | Stone arch | 1902 | 1994 | Boston Street | Harris Creek | 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 | Swing span | 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 | Steel rolled stringer | 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 | Pratt truss | 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 | Pratt truss | 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 and Ohio Canal, Conococheague Creek Aqueduct | Extant | Stone arch | 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 and Ohio Canal, Conococheague Creek Aqueduct) |
| MD-124 | Allender Road Bridge | Replaced | Steel built-up girder | 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 | Pratt truss | 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 | Extant | Stone arch | 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 | Extant | Stone arch | 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 | Extant | Pratt truss | | 2007 | | | Westminster | Carroll | 39°40′02″N 77°01′01″W﻿ / ﻿39.66722°N 77.01694°W﻿ / 39.66722; -77.01694﻿ (Bollman Truss Bridg) |
| MD-174 | Gilpin's Falls Covered Bridge | Extant | Burr truss | 1860 | 2012 | MD 272 (North East Road) (former) | 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) |
| MD-180 | Baltimore and Ohio Railroad, Locust Point Transfer Bridges | Extant | | 1911 | 2010 | Baltimore and Ohio Railroad (former) | | Baltimore | Baltimore | 39°16′29″N 76°35′20″W﻿ / ﻿39.27472°N 76.58889°W﻿ / 39.27472; -76.58889﻿ (Baltimore and Ohio Railroad, Locust Point Transfer Bridges) |
| MD-183-B | Chesapeake and Ohio Canal, Big Slackwater Towpath, Pipe Culvert | Extant | Culvert | | 2005 | Chesapeake and Ohio Canal towpath | Unnamed stream | Williamsport | Washington | |
| MD-187 | Jericho Road Covered Bridge | Extant | Burr truss | 1865 | 2015 | Jericho Road | Little Gunpowder Falls | Kingsville and Jerusalem | Baltimore and Harford | 39°27′34″N 76°23′16″W﻿ / ﻿39.45944°N 76.38778°W﻿ / 39.45944; -76.38778﻿ (Jericho Road Covered Bridge) |
| MD-190 | Covered Bridge Educational Models | Extant | | | 2017 | Johns Hopkins University | | Baltimore | Baltimore | 39°19′40″N 76°37′15″W﻿ / ﻿39.32778°N 76.62083°W﻿ / 39.32778; -76.62083﻿ (Covered Bridge Educational Models) |
| MD-195 | Baltimore and Ohio Railroad, Metropolitan Branch Bridge 9A | Relocated | Steel built-up girder | 1918 | 2019 | Talbot Avenue | CSX Metropolitan Subdivision | Silver Spring | Montgomery | 39°00′07″N 77°02′41″W﻿ / ﻿39.00194°N 77.04472°W﻿ / 39.00194; -77.04472﻿ (Baltimore and Ohio Railroad, Metropolitan Branch Bridge 9A) |
| WV-36 | Baltimore and Ohio Railroad, Bollman Bridge | Replaced | Bollman truss | 1868 | 1987 | Baltimore and Ohio Railroad (former) | 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 and Ohio Railroad, Bollman Bridge) |