US Bridges

Glen Arm Road over Long Green Creek

Poor

Baltimore County, Maryland · 1.52 Miles NW of Md 147 · Structure no. 200000B-0222010

Built
1987
38 years old
Condition
Poor
inspected April 2023
Type
Truss - Thru
Steel
Length
77 ft
1 main span
Daily traffic
7,740
2023 count
Owner
County
County Highway Agency

About this bridge

Glen Arm Road over Long Green Creek is a steel truss - thru carrying Glen Arm Road over Long Green Creek in Baltimore County, Maryland. It was built in 1987, so it is 38 years old, younger than the Maryland average of 52.6 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 7,740 vehicles a day, roughly 5% of them trucks, projected to reach 9,440 by 2043. The structure is 77 ft (23.5 m) long and 25 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesGlen Arm Road
CrossesLong Green Creek
Location1.52 Miles NW of Md 147
RouteCounty Highway 6933
CountyBaltimore County
StateMaryland
Coordinates39.45714, -76.48078
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
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 adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48 US tons
Inventory rating29 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckSteel plate
Main spans1
Design loadHS 20
Structure length77 ft (23.5 m)
Longest span71 ft (21.6 m)
Deck width25 ft (7.6 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,740 (2023)
Projected traffic9,440 by 2043
Trucks5%
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

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$990,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Glen Arm Road over Long Green Creek built?

It was built in 1987, making it 38 years old in 2025.

What condition is Glen Arm Road over Long Green Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2023.

How much traffic does Glen Arm Road over Long Green Creek carry?

About 7,740 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Glen Arm Road over Long Green Creek?

The structure is 77 ft (23.5 m) long with a longest span of 71 ft (21.6 m) and a deck 25 ft wide.

Who owns Glen Arm Road over Long Green Creek?

It is owned by the County Highway Agency.