US Bridges

Md 31 over Dickerson Run

Fair

Carroll County, Maryland · 0.05 MI W of New Windsor · Structure no. 100000060007010

Built
1924
101 years old
Condition
Fair
inspected February 2024
Type
Tee Beam
Concrete
Length
32 ft
1 main span
Daily traffic
4,861
2009 count
Owner
State
State Highway Agency

About this bridge

Md 31 over Dickerson Run is a concrete tee beam carrying Md 31 over Dickerson Run in Carroll County, Maryland. It was built in 1924, so it is 101 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 4,861 vehicles a day, roughly 8% of them trucks, projected to reach 5,905 by 2026. The structure is 32 ft (9.8 m) long and 25 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesMd 31
CrossesDickerson Run
Location0.05 MI W of New Windsor
RouteState Highway 31
CountyCarroll County
StateMaryland
Coordinates39.53891, -77.10505
Functional classRural Minor 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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
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 adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating52 US tons
Inventory rating31.5 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length32 ft (9.8 m)
Longest span30 ft (9.1 m)
Deck width25 ft (7.6 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,861 (2009)
Projected traffic5,905 by 2026
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$53,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Md 31 over Dickerson Run built?

It was built in 1924, making it 101 years old in 2025.

What condition is Md 31 over Dickerson 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 February 2024.

How much traffic does Md 31 over Dickerson Run carry?

About 4,861 vehicles per day (2009 count), of which roughly 8% are trucks.

How long is Md 31 over Dickerson Run?

The structure is 32 ft (9.8 m) long with a longest span of 30 ft (9.1 m) and a deck 25 ft wide.

Who owns Md 31 over Dickerson Run?

It is owned by the State Highway Agency.