US Bridges

Md 147 over Long Green Creek

Fair

Baltimore County, Maryland · 0.02 MI N of Hartley Mill · Structure no. 100000030092010

Built
1915
110 years old, rebuilt 1969
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
40 ft
1 main span
Daily traffic
5,752
2009 count
Owner
State
State Highway Agency

About this bridge

Md 147 over Long Green Creek is a steel stringer/multi-beam or girder carrying Md 147 over Long Green Creek in Baltimore County, Maryland. It was built in 1915 and reconstructed in 1969, so it is 110 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 5,752 vehicles a day, roughly 8% of them trucks, projected to reach 7,024 by 2026. The structure is 40 ft (12.2 m) long and 28 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

No coordinates are recorded for this structure.

CarriesMd 147
CrossesLong Green Creek
Location0.02 MI N of Hartley Mill
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
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 alignment8: Equal to present desirable criteria
Operating rating81 US tons
Inventory rating48.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length40 ft (12.2 m)
Longest span37 ft (11.3 m)
Deck width28 ft (8.4 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,752 (2009)
Projected traffic7,024 by 2026
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$73,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Md 147 over Long Green Creek built?

It was built in 1915, making it 110 years old in 2025. It was reconstructed in 1969.

What condition is Md 147 over Long Green Creek 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 2023.

How much traffic does Md 147 over Long Green Creek carry?

About 5,752 vehicles per day (2009 count), of which roughly 8% are trucks.

How long is Md 147 over Long Green Creek?

The structure is 40 ft (12.2 m) long with a longest span of 37 ft (11.3 m) and a deck 28 ft wide.

Who owns Md 147 over Long Green Creek?

It is owned by the State Highway Agency.