US Bridges

SR 3102 Blair Road over Over SR 8 N/S R.C.Frame

Fair

Venango County, Pennsylvania · Irwin Township · Structure no. 000000000033646

Built
1975
50 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
236 ft
2 main spans
Daily traffic
90
2023 count
Owner
State
State Highway Agency

About this bridge

SR 3102 Blair Road over Over SR 8 N/S R.C.Frame is a steel continuous stringer/multi-beam or girder carrying SR 3102 Blair Road over Over SR 8 N/S R.C.Frame in Venango County, Pennsylvania. It was built in 1975, so it is 50 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 5 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 90 vehicles a day, roughly 3% of them trucks, projected to reach 141 by 2032. The structure is 236 ft (71.9 m) long and 40 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSR 3102 Blair Road
CrossesOver SR 8 N/S R.C.Frame
LocationIrwin Township
RouteState Highway 0
CountyVenango County
StatePennsylvania
Coordinates41.25, -79.9413
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating85 US tons
Inventory rating51 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length236 ft (71.9 m)
Longest span116 ft (35.4 m)
Deck width40 ft (12.2 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic90 (2023)
Projected traffic141 by 2032
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
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 proposedDeck rehabilitation with only incidental widening
Estimated improvement cost$130,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR 3102 Blair Road over Over SR 8 N/S R.C.Frame built?

It was built in 1975, making it 50 years old in 2025.

What condition is SR 3102 Blair Road over Over SR 8 N/S R.C.Frame 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 2024.

How much traffic does SR 3102 Blair Road over Over SR 8 N/S R.C.Frame carry?

About 90 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is SR 3102 Blair Road over Over SR 8 N/S R.C.Frame?

The structure is 236 ft (71.9 m) long with a longest span of 116 ft (35.4 m) and a deck 40 ft wide.

Who owns SR 3102 Blair Road over Over SR 8 N/S R.C.Frame?

It is owned by the State Highway Agency.