US Bridges

SR 51 over Fallen Timber Run

Good

Allegheny County, Pennsylvania · 750 NW Weigel Hill RD · Structure no. 000000000045723

Built
2009
16 years old
Condition
Good
inspected December 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
36 ft
1 main span
Daily traffic
24,914
2024 count
Owner
State
State Highway Agency

About this bridge

SR 51 over Fallen Timber Run is a prestressed concrete box beam or girders - multiple carrying SR 51 over Fallen Timber Run in Allegheny County, Pennsylvania. It was built in 2009, so it is 16 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 24,914 vehicles a day, roughly 6% of them trucks, projected to reach 24,510 by 2032. The structure is 36 ft (11 m) long and 69 ft wide.

CarriesSR 51
CrossesFallen Timber Run
Location750 NW Weigel Hill RD
RouteState Highway 51
Coordinates40.26433, -79.87846
Functional classUrban Other Principal Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83 US tons
Inventory rating41 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length36 ft (11 m)
Longest span34 ft (10.4 m)
Deck width69 ft (21.1 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deck17 ft (5.2 m)

Traffic and service

Average daily traffic24,914 (2024)
Projected traffic24,510 by 2032
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 SR 51 over Fallen Timber Run built?

It was built in 2009, making it 16 years old in 2025.

What condition is SR 51 over Fallen Timber 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 December 2023.

How much traffic does SR 51 over Fallen Timber Run carry?

About 24,914 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is SR 51 over Fallen Timber Run?

The structure is 36 ft (11 m) long with a longest span of 34 ft (10.4 m) and a deck 69 ft wide.

Who owns SR 51 over Fallen Timber Run?

It is owned by the State Highway Agency.