US Bridges

Rock Run Road over Rock Run

FairPosted for load

Harford County, Maryland · 0.01 MI E of Wilkinson RD · Structure no. 200000H-0022010

Built
1955
70 years old, rebuilt 1988
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
62 ft
2 main spans
Daily traffic
154
2020 count
Owner
County
County Highway Agency

About this bridge

Rock Run Road over Rock Run is a steel stringer/multi-beam or girder carrying Rock Run Road over Rock Run in Harford County, Maryland. It was built in 1955 and reconstructed in 1988, so it is 70 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 154 vehicles a day, roughly 5% of them trucks, projected to reach 184 by 2040. The structure is 62 ft (18.8 m) long and 22 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesRock Run Road
CrossesRock Run
Location0.01 MI E of Wilkinson RD
RouteCounty Highway 179
CountyHarford County
StateMaryland
Coordinates39.60739, -76.1461
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 protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 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 adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.9 US tons
Inventory rating38 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans2
Design loadUnknown
Structure length62 ft (18.8 m)
Longest span29 ft (8.8 m)
Deck width22 ft (6.6 m)
Roadway width21 ft (6.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic154 (2020)
Projected traffic184 by 2040
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Rock Run Road over Rock Run built?

It was built in 1955, making it 70 years old in 2025. It was reconstructed in 1988.

What condition is Rock Run Road over Rock 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 2023.

How much traffic does Rock Run Road over Rock Run carry?

About 154 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is Rock Run Road over Rock Run?

The structure is 62 ft (18.8 m) long with a longest span of 29 ft (8.8 m) and a deck 22 ft wide.

Who owns Rock Run Road over Rock Run?

It is owned by the County Highway Agency.