US Bridges

Harney Road over Alloway Creek

FairPosted for load

Carroll County, Maryland · 1.26 Miles S of Pa Line · Structure no. 200000CL0210010

Built
1919
106 years old, rebuilt 1963
Condition
Fair
inspected September 2024
Type
Frame
Concrete Continuous
Length
64 ft
3 main spans
Daily traffic
1,911
2021 count
Owner
County
County Highway Agency

About this bridge

Harney Road over Alloway Creek is a concrete continuous frame carrying Harney Road over Alloway Creek in Carroll County, Maryland. It was built in 1919 and reconstructed in 1963, so it is 106 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. Its operating status is: posted for load restriction.

It carries about 1,911 vehicles a day, roughly 5% of them trucks, projected to reach 3,132 by 2041. The structure is 64 ft (19.5 m) long and 30 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesHarney Road
CrossesAlloway Creek
Location1.26 Miles S of Pa Line
RouteCounty Highway 4
CountyCarroll County
StateMaryland
Coordinates39.70466, -77.20163
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionSeptember 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 adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating37 US tons
Inventory rating22.5 US tons

Structure

Structure typeFrame
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length64 ft (19.5 m)
Longest span21 ft (6.4 m)
Deck width30 ft (9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,911 (2021)
Projected traffic3,132 by 2041
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Harney Road over Alloway Creek built?

It was built in 1919, making it 106 years old in 2025. It was reconstructed in 1963.

What condition is Harney Road over Alloway Creek 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 September 2024.

How much traffic does Harney Road over Alloway Creek carry?

About 1,911 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is Harney Road over Alloway Creek?

The structure is 64 ft (19.5 m) long with a longest span of 21 ft (6.4 m) and a deck 30 ft wide.

Who owns Harney Road over Alloway Creek?

It is owned by the County Highway Agency.