US Bridges

Md 147 over Little Gunpowder Falls

Fair

Baltimore County, Maryland · On Harford CO Line · Structure no. 100000030090010

Built
1928
97 years old
Condition
Fair
inspected July 2024
Type
Arch - Deck
Concrete
Length
56 ft
1 main span
Daily traffic
10,192
2009 count
Owner
State
State Highway Agency

About this bridge

Md 147 over Little Gunpowder Falls is a concrete arch - deck carrying Md 147 over Little Gunpowder Falls in Baltimore County, Maryland. It was built in 1928, so it is 97 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 10,192 vehicles a day, roughly 8% of them trucks, projected to reach 12,386 by 2026. The structure is 56 ft (17.1 m) long and 27 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

No coordinates are recorded for this structure.

CarriesMd 147
CrossesLittle Gunpowder Falls
LocationOn Harford CO Line
RouteState Highway 147
CountyBaltimore County
StateMaryland
Functional classRural Major Collector

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 inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating66 US tons
Inventory rating39.5 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length56 ft (17.1 m)
Longest span56 ft (17.1 m)
Deck width27 ft (8.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,192 (2009)
Projected traffic12,386 by 2026
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$121,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Md 147 over Little Gunpowder Falls built?

It was built in 1928, making it 97 years old in 2025.

What condition is Md 147 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 July 2024.

How much traffic does Md 147 over Little Gunpowder Falls carry?

About 10,192 vehicles per day (2009 count), of which roughly 8% are trucks.

How long is Md 147 over Little Gunpowder Falls?

The structure is 56 ft (17.1 m) long with a longest span of 56 ft (17.1 m) and a deck 27 ft wide.

Who owns Md 147 over Little Gunpowder Falls?

It is owned by the State Highway Agency.