US Bridges

US 1 over Herbert Run

Fair

Baltimore County, Maryland · 0.49 MI S of Md 644A · Structure no. 100000030007010

Built
1949
76 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
70 ft
1 main span
Daily traffic
16,379
2024 count
Owner
State
State Highway Agency

About this bridge

US 1 over Herbert Run is a steel stringer/multi-beam or girder carrying US 1 over Herbert Run in Baltimore County, Maryland. It was built in 1949, so it is 76 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 16,379 vehicles a day, roughly 4% of them trucks, projected to reach 31,172 by 2044. The structure is 70 ft (21.3 m) long and 79 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesUS 1
CrossesHerbert Run
Location0.49 MI S of Md 644A
RouteU.S. Route 1
CountyBaltimore County
StateMaryland
Coordinates39.23151, -76.69207
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.5 US tons
Inventory rating30 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length70 ft (21.3 m)
Longest span65 ft (19.8 m)
Deck width79 ft (24 m)
Roadway width68 ft (20.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,379 (2024)
Projected traffic31,172 by 2044
Trucks4%
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

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$364,000
NavigationNo navigation control on waterway

Frequently asked questions

When was US 1 over Herbert Run built?

It was built in 1949, making it 76 years old in 2025.

What condition is US 1 over Herbert 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 March 2024.

How much traffic does US 1 over Herbert Run carry?

About 16,379 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is US 1 over Herbert Run?

The structure is 70 ft (21.3 m) long with a longest span of 65 ft (19.8 m) and a deck 79 ft wide.

Who owns US 1 over Herbert Run?

It is owned by the State Highway Agency.