US Bridges

US 1 over Deep Run

Fair

Howard County, Maryland · 0.56 Mile North of Md 175 · Structure no. 100000130003010

Built
1929
96 years old, rebuilt 1955
Condition
Fair
inspected June 2024
Type
Arch - Deck
Concrete
Length
22 ft
1 main span
Daily traffic
29,180
2013 count
Owner
State
State Highway Agency

About this bridge

US 1 over Deep Run is a concrete arch - deck carrying US 1 over Deep 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 6 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 29,180 vehicles a day, roughly 8% of them trucks, projected to reach 28,251 by 2026. The structure is 22 ft (6.7 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
CrossesDeep Run
Location0.56 Mile North of Md 175
RouteU.S. Route 1
CountyHoward County
StateMaryland
Coordinates39.17576, -76.77623
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length22 ft (6.7 m)
Longest span22 ft (6.7 m)
Deck width68 ft (20.7 m)
Roadway width66 ft (20.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic29,180 (2013)
Projected traffic28,251 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was US 1 over Deep 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 Deep 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 Deep Run carry?

About 29,180 vehicles per day (2013 count), of which roughly 8% are trucks.

How long is US 1 over Deep Run?

The structure is 22 ft (6.7 m) long with a longest span of 22 ft (6.7 m) and a deck 68 ft wide.

Who owns US 1 over Deep Run?

It is owned by the State Highway Agency.