US Bridges

SR 0308 over Slippery Rock Creek

Good

Butler County, Pennsylvania · 2.4 MI S SR 58 Intersec. · Structure no. 000000000047576

Built
2012
13 years old
Condition
Good
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
153 ft
3 main spans
Daily traffic
1,252
2023 count
Owner
State
State Highway Agency

About this bridge

SR 0308 over Slippery Rock Creek is a steel continuous stringer/multi-beam or girder carrying SR 0308 over Slippery Rock Creek in Butler County, Pennsylvania. It was built in 2012, so it is 13 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 1,252 vehicles a day, roughly 16% of them trucks, projected to reach 2,048 by 2032. The structure is 153 ft (46.6 m) long and 40 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

Open in Google Maps
CarriesSR 0308
CrossesSlippery Rock Creek
Location2.4 MI S SR 58 Intersec.
RouteState Highway 308
CountyButler County
StatePennsylvania
Coordinates41.11161, -79.89774
Functional classRural Major Collector

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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.6 US tons
Inventory rating43.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length153 ft (46.6 m)
Longest span50 ft (15.2 m)
Deck width40 ft (12.3 m)
Roadway width37 ft (11.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,252 (2023)
Projected traffic2,048 by 2032
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 SR 0308 over Slippery Rock Creek built?

It was built in 2012, making it 13 years old in 2025.

What condition is SR 0308 over Slippery Rock Creek 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 January 2024.

How much traffic does SR 0308 over Slippery Rock Creek carry?

About 1,252 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is SR 0308 over Slippery Rock Creek?

The structure is 153 ft (46.6 m) long with a longest span of 50 ft (15.2 m) and a deck 40 ft wide.

Who owns SR 0308 over Slippery Rock Creek?

It is owned by the State Highway Agency.