US Bridges

Double Hills Road over Herring Run

FairPosted for load

Caroline County, Maryland · 0.25 MI NE of Md 404 · Structure no. 200000CO0049010

Built
1913
112 years old
Condition
Fair
inspected December 2024
Type
Tee Beam
Concrete
Length
28 ft
1 main span
Daily traffic
516
2024 count
Owner
County
County Highway Agency

About this bridge

Double Hills Road over Herring Run is a concrete tee beam carrying Double Hills Road over Herring Run in Caroline County, Maryland. It was built in 1913, so it is 112 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. Its operating status is: posted for load restriction.

It carries about 516 vehicles a day, roughly 2% of them trucks, projected to reach 695 by 2044. The structure is 28 ft (8.5 m) long and 24 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesDouble Hills Road
CrossesHerring Run
Location0.25 MI NE of Md 404
RouteCounty Highway 372
CountyCaroline County
StateMaryland
Coordinates38.85458, -75.814
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating41.4 US tons
Inventory rating24.5 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length28 ft (8.5 m)
Longest span27 ft (8.2 m)
Deck width24 ft (7.3 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic516 (2024)
Projected traffic695 by 2044
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$216,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Double Hills Road over Herring Run built?

It was built in 1913, making it 112 years old in 2025.

What condition is Double Hills 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 December 2024.

How much traffic does Double Hills Road over Herring Run carry?

About 516 vehicles per day (2024 count), of which roughly 2% are trucks.

How long is Double Hills Road over Herring Run?

The structure is 28 ft (8.5 m) long with a longest span of 27 ft (8.2 m) and a deck 24 ft wide.

Who owns Double Hills Road over Herring Run?

It is owned by the County Highway Agency.