US Bridges

Dorrington RD over Robinson Run

Good

Allegheny County, Pennsylvania · .25 MI S. of SR3048 · Structure no. 000000000045973

Built
2010
15 years old
Condition
Good
inspected May 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
64 ft
1 main span
Daily traffic
900
2024 count
Owner
State
State Highway Agency

About this bridge

Dorrington RD over Robinson Run is a prestressed concrete box beam or girders - multiple carrying Dorrington RD over Robinson Run in Allegheny County, Pennsylvania. It was built in 2010, so it is 15 years old, younger than the Pennsylvania average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 900 vehicles a day, roughly 5% of them trucks, projected to reach 742 by 2032. The structure is 64 ft (19.5 m) long and 29 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesDorrington RD
CrossesRobinson Run
Location.25 MI S. of SR3048
RouteState Highway 0
Coordinates40.39384, -80.11105
Functional classUrban Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating110.1 US tons
Inventory rating49.1 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length64 ft (19.5 m)
Longest span61 ft (18.6 m)
Deck width29 ft (8.8 m)
Roadway width29 ft (8.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic900 (2024)
Projected traffic742 by 2032
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

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 Dorrington RD over Robinson Run built?

It was built in 2010, making it 15 years old in 2025.

What condition is Dorrington RD over Robinson Run in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2023.

How much traffic does Dorrington RD over Robinson Run carry?

About 900 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Dorrington RD over Robinson Run?

The structure is 64 ft (19.5 m) long with a longest span of 61 ft (18.6 m) and a deck 29 ft wide.

Who owns Dorrington RD over Robinson Run?

It is owned by the State Highway Agency.