US Bridges

US 1 over Hammond Branch

Fair

Howard County, Maryland · 1.28 Miles South of Md 32 · Structure no. 100000130009010

Built
1929
96 years old, rebuilt 1954
Condition
Fair
inspected June 2024
Type
Tee Beam
Concrete
Length
33 ft
1 main span
Daily traffic
36,052
2009 count
Owner
State
State Highway Agency

About this bridge

US 1 over Hammond Branch is a concrete tee beam carrying US 1 over Hammond Branch in Howard County, Maryland. It was built in 1929 and reconstructed in 1954, 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 36,052 vehicles a day, roughly 8% of them trucks, projected to reach 39,896 by 2026. The structure is 33 ft (10.1 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
CrossesHammond Branch
Location1.28 Miles South of Md 32
RouteU.S. Route 1
CountyHoward County
StateMaryland
Coordinates39.12333, -76.82502
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 protection6 SatisfactoryStructural elements show some minor deterioration.
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 rating54 US tons
Inventory rating32.5 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length33 ft (10.1 m)
Longest span30 ft (9.1 m)
Deck width68 ft (20.6 m)
Roadway width66 ft (20.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic36,052 (2009)
Projected traffic39,896 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 Hammond Branch built?

It was built in 1929, making it 96 years old in 2025. It was reconstructed in 1954.

What condition is US 1 over Hammond Branch 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 Hammond Branch carry?

About 36,052 vehicles per day (2009 count), of which roughly 8% are trucks.

How long is US 1 over Hammond Branch?

The structure is 33 ft (10.1 m) long with a longest span of 30 ft (9.1 m) and a deck 68 ft wide.

Who owns US 1 over Hammond Branch?

It is owned by the State Highway Agency.