US Bridges

Md 146 over Little Gunpowder Falls

Fair

Baltimore County, Maryland · On Harford CO Line · Structure no. 100000030089010

Built
1931
94 years old, rebuilt 1989
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
63 ft
1 main span
Daily traffic
13,621
2009 count
Owner
State
State Highway Agency

About this bridge

Md 146 over Little Gunpowder Falls is a steel stringer/multi-beam or girder carrying Md 146 over Little Gunpowder Falls in Baltimore County, Maryland. It was built in 1931 and reconstructed in 1989, so it is 94 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 13,621 vehicles a day, roughly 8% of them trucks, projected to reach 15,267 by 2026. The structure is 63 ft (19.2 m) long and 33 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

No coordinates are recorded for this structure.

CarriesMd 146
CrossesLittle Gunpowder Falls
LocationOn Harford CO Line
RouteState Highway 146
CountyBaltimore County
StateMaryland
Functional classRural Minor 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
Deck7 GoodSome minor problems.
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 inspectionSeptember 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating74 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length63 ft (19.2 m)
Longest span61 ft (18.6 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,621 (2009)
Projected traffic15,267 by 2026
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

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$138,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Md 146 over Little Gunpowder Falls built?

It was built in 1931, making it 94 years old in 2025. It was reconstructed in 1989.

What condition is Md 146 over Little Gunpowder Falls 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 September 2024.

How much traffic does Md 146 over Little Gunpowder Falls carry?

About 13,621 vehicles per day (2009 count), of which roughly 8% are trucks.

How long is Md 146 over Little Gunpowder Falls?

The structure is 63 ft (19.2 m) long with a longest span of 61 ft (18.6 m) and a deck 33 ft wide.

Who owns Md 146 over Little Gunpowder Falls?

It is owned by the State Highway Agency.