US Bridges

US 1 over Branch of Dorsey Run

Fair

Howard County, Maryland · 1.03 Miles S of Md 958P · Structure no. 100000130005010

Built
1929
96 years old, rebuilt 1955
Condition
Fair
inspected August 2023
Type
Tee Beam
Concrete
Length
21 ft
1 main span
Daily traffic
21,992
2009 count
Owner
State
State Highway Agency

About this bridge

US 1 over Branch of Dorsey Run is a concrete tee beam carrying US 1 over Branch of Dorsey Run in Howard County, Maryland. It was built in 1929 and reconstructed in 1955, 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 21 ft (6.4 m) long and 68 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesUS 1
CrossesBranch of Dorsey Run
Location1.03 Miles S of Md 958P
RouteU.S. Route 1
CountyHoward County
StateMaryland
Coordinates39.15688, -76.79761
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 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 adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67 US tons
Inventory rating40 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length21 ft (6.4 m)
Longest span21 ft (6.4 m)
Deck width68 ft (20.6 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 closed3.7 mi (6 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$94,000
NavigationNo navigation control on waterway

Frequently asked questions

When was US 1 over Branch of Dorsey Run built?

It was built in 1929, making it 96 years old in 2025. It was reconstructed in 1955.

What condition is US 1 over Branch of 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 August 2023.

How much traffic does US 1 over Branch of Dorsey Run carry?

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

How long is US 1 over Branch of Dorsey Run?

The structure is 21 ft (6.4 m) long with a longest span of 21 ft (6.4 m) and a deck 68 ft wide.

Who owns US 1 over Branch of Dorsey Run?

It is owned by the State Highway Agency.