US Bridges

SR0308 over S Br Slippery Rock Creek

Fair

Butler County, Pennsylvania · North of West Sunbury · Structure no. 000000000007927

Built
1959
66 years old, rebuilt 2009
Condition
Fair
inspected August 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
73 ft
1 main span
Daily traffic
2,593
2024 count
Owner
State
State Highway Agency

About this bridge

SR0308 over S Br Slippery Rock Creek is a prestressed concrete box beam or girders - multiple carrying SR0308 over S Br Slippery Rock Creek in Butler County, Pennsylvania. It was built in 1959 and reconstructed in 2009, so it is 66 years old, older 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 2,593 vehicles a day, roughly 6% of them trucks, projected to reach 2,933 by 2032. The structure is 73 ft (22.3 m) long and 33 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesSR0308
CrossesS Br Slippery Rock Creek
LocationNorth of West Sunbury
RouteState Highway 308
CountyButler County
StatePennsylvania
Coordinates41.06431, -79.89829
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating48 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length73 ft (22.3 m)
Longest span70 ft (21.3 m)
Deck width33 ft (10.2 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,593 (2024)
Projected traffic2,933 by 2032
Trucks6%
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

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$161,000
NavigationNo navigation control on waterway

Frequently asked questions

When was SR0308 over S Br Slippery Rock Creek built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 2009.

What condition is SR0308 over S Br Slippery Rock Creek 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 August 2023.

How much traffic does SR0308 over S Br Slippery Rock Creek carry?

About 2,593 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is SR0308 over S Br Slippery Rock Creek?

The structure is 73 ft (22.3 m) long with a longest span of 70 ft (21.3 m) and a deck 33 ft wide.

Who owns SR0308 over S Br Slippery Rock Creek?

It is owned by the State Highway Agency.