US Bridges

Glen Arm Road over Haystack Branch

Fair

Baltimore County, Maryland · 0.6 MI W of Harford RD · Structure no. 200000B-0074010

Built
1976
49 years old
Condition
Fair
inspected April 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
32 ft
1 main span
Daily traffic
7,740
2023 count
Owner
County
County Highway Agency

About this bridge

Glen Arm Road over Haystack Branch is a prestressed concrete box beam or girders - multiple carrying Glen Arm Road over Haystack Branch in Baltimore County, Maryland. It was built in 1976, so it is 49 years old, younger 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 7,740 vehicles a day, roughly 5% of them trucks, projected to reach 9,440 by 2043. The structure is 32 ft (9.8 m) long and 44 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesGlen Arm Road
CrossesHaystack Branch
Location0.6 MI W of Harford RD
RouteCounty Highway 6933
CountyBaltimore County
StateMaryland
Coordinates39.46361, -76.46645
Functional classRural Minor 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.
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating85.4 US tons
Inventory rating51 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length32 ft (9.8 m)
Longest span30 ft (9.1 m)
Deck width44 ft (13.3 m)
Roadway width40 ft (12.3 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 closed3.1 mi (5 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Glen Arm Road over Haystack Branch built?

It was built in 1976, making it 49 years old in 2025.

What condition is Glen Arm Road over Haystack 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 April 2023.

How much traffic does Glen Arm Road over Haystack Branch carry?

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

How long is Glen Arm Road over Haystack Branch?

The structure is 32 ft (9.8 m) long with a longest span of 30 ft (9.1 m) and a deck 44 ft wide.

Who owns Glen Arm Road over Haystack Branch?

It is owned by the County Highway Agency.