US Bridges

US 1 over Dorsey Run

Fair

Howard County, Maryland · 0.04 Mile S of Md 958P · Structure no. 100000130004010

Built
1929
96 years old, rebuilt 1945
Condition
Fair
inspected June 2024
Type
Tee Beam
Concrete
Length
38 ft
1 main span
Daily traffic
21,992
2009 count
Owner
State
State Highway Agency

About this bridge

US 1 over Dorsey Run is a concrete tee beam carrying US 1 over Dorsey Run in Howard County, Maryland. It was built in 1929 and reconstructed in 1945, so it is 96 years old, older than the Maryland average of 52.6 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 21,992 vehicles a day, roughly 8% of them trucks, projected to reach 24,031 by 2026. The structure is 38 ft (11.6 m) long and 68 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesUS 1
CrossesDorsey Run
Location0.04 Mile S of Md 958P
RouteU.S. Route 1
CountyHoward County
StateMaryland
Coordinates39.16887, -76.78815
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66 US tons
Inventory rating39.5 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length38 ft (11.6 m)
Longest span38 ft (11.6 m)
Deck width68 ft (20.8 m)
Roadway width66 ft (20.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21,992 (2009)
Projected traffic24,031 by 2026
Trucks8%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$172,000
NavigationNo navigation control on waterway

Frequently asked questions

When was US 1 over Dorsey Run built?

It was built in 1929, making it 96 years old in 2025. It was reconstructed in 1945.

What condition is US 1 over Dorsey Run in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in June 2024.

How much traffic does US 1 over Dorsey Run carry?

About 21,992 vehicles per day (2009 count), of which roughly 8% are trucks.

How long is US 1 over Dorsey Run?

The structure is 38 ft (11.6 m) long with a longest span of 38 ft (11.6 m) and a deck 68 ft wide.

Who owns US 1 over Dorsey Run?

It is owned by the State Highway Agency.