US Bridges

River Road over Lobbs Run

Fair

Allegheny County, Pennsylvania · 100 Ft NE of SR 3021 · Structure no. 000000000001266

Built
1952
73 years old
Condition
Fair
inspected June 2022
Type
Culvert
Concrete
Length
28 ft
1 main span
Daily traffic
6,441
2024 count
Owner
State
State Highway Agency

About this bridge

River Road over Lobbs Run is a concrete culvert carrying River Road over Lobbs Run in Allegheny County, Pennsylvania. It was built in 1952, so it is 73 years old, older than the Pennsylvania average of 54.8 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 6,441 vehicles a day, roughly 9% of them trucks, projected to reach 8,055 by 2032. The structure is 28 ft (8.5 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesRiver Road
CrossesLobbs Run
Location100 Ft NE of SR 3021
RouteState Highway 837
CountyAllegheny County
StatePennsylvania
Coordinates40.25904, -79.91516
Functional classUrban 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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length28 ft (8.5 m)
Longest span28 ft (8.5 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,441 (2024)
Projected traffic8,055 by 2032
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was River Road over Lobbs Run built?

It was built in 1952, making it 73 years old in 2025.

What condition is River Road over Lobbs 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 June 2022.

How much traffic does River Road over Lobbs Run carry?

About 6,441 vehicles per day (2024 count), of which roughly 9% are trucks.

How long is River Road over Lobbs Run?

The structure is 28 ft (8.5 m) long with a longest span of 28 ft (8.5 m).

Who owns River Road over Lobbs Run?

It is owned by the State Highway Agency.