US Bridges

Belair Road over Herring Run

Fair

Baltimore city, Maryland · 0.6 MI W Erdman Ave · Structure no. 200000BC4402010

Built
1925
100 years old
Condition
Fair
inspected August 2024
Type
Arch - Deck
Concrete
Length
52 ft
1 main span
Daily traffic
22,752
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Belair Road over Herring Run is a concrete arch - deck carrying Belair Road over Herring Run in Baltimore city, Maryland. It was built in 1925, so it is 100 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 5 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 22,752 vehicles a day, roughly 8% of them trucks, projected to reach 27,761 by 2040. The structure is 52 ft (15.9 m) long and 78 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesBelair Road
CrossesHerring Run
Location0.6 MI W Erdman Ave
RouteU.S. Route 1
CountyBaltimore city
StateMaryland
Coordinates39.3264, -76.56756
Functional classUrban Other Principal 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
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating36 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadH 20
Structure length52 ft (15.9 m)
Longest span52 ft (15.9 m)
Deck width78 ft (23.9 m)
Roadway width63 ft (19.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,752 (2020)
Projected traffic27,761 by 2040
Trucks8%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$51,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Belair Road over Herring Run built?

It was built in 1925, making it 100 years old in 2025.

What condition is Belair Road over Herring Run 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 August 2024.

How much traffic does Belair Road over Herring Run carry?

About 22,752 vehicles per day (2020 count), of which roughly 8% are trucks.

How long is Belair Road over Herring Run?

The structure is 52 ft (15.9 m) long with a longest span of 52 ft (15.9 m) and a deck 78 ft wide.

Who owns Belair Road over Herring Run?

It is owned by the City or Municipal Highway Agency.