US Bridges

T-784 Dry Ridge RD over Pine Run

Fair

Armstrong County, Pennsylvania · 0.4 Mile N of Timblin RD · Structure no. 000000000003404

Built
1989
36 years old
Condition
Fair
inspected April 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
70 ft
1 main span
Daily traffic
50
2021 count
Owner
County
County Highway Agency

About this bridge

T-784 Dry Ridge RD over Pine Run is a prestressed concrete box beam or girders - multiple carrying T-784 Dry Ridge RD over Pine Run in Armstrong County, Pennsylvania. It was built in 1989, so it is 36 years old, younger 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 50 vehicles a day, roughly 9% of them trucks, projected to reach 70 by 2041. The structure is 70 ft (21.3 m) long and 28 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesT-784 Dry Ridge RD
CrossesPine Run
Location0.4 Mile N of Timblin RD
RouteCity Street 0
Coordinates40.96296, -79.224
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating93 US tons
Inventory rating46 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length70 ft (21.3 m)
Longest span66 ft (20.1 m)
Deck width28 ft (8.4 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2021)
Projected traffic70 by 2041
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 T-784 Dry Ridge RD over Pine Run built?

It was built in 1989, making it 36 years old in 2025.

What condition is T-784 Dry Ridge RD over Pine 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 April 2023.

How much traffic does T-784 Dry Ridge RD over Pine Run carry?

About 50 vehicles per day (2021 count), of which roughly 9% are trucks.

How long is T-784 Dry Ridge RD over Pine Run?

The structure is 70 ft (21.3 m) long with a longest span of 66 ft (20.1 m) and a deck 28 ft wide.

Who owns T-784 Dry Ridge RD over Pine Run?

It is owned by the County Highway Agency.