US Bridges

SR0008 over Slippery Rock Creek

Fair

Butler County, Pennsylvania · East of Slippery Rock · Structure no. 000000000007792

Built
1989
36 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
105 ft
1 main span
Daily traffic
4,488
2023 count
Owner
State
State Highway Agency

About this bridge

SR0008 over Slippery Rock Creek is a steel stringer/multi-beam or girder carrying SR0008 over Slippery Rock Creek in Butler 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 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 4,488 vehicles a day, roughly 13% of them trucks, projected to reach 5,700 by 2032. The structure is 105 ft (32 m) long and 43 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesSR0008
CrossesSlippery Rock Creek
LocationEast of Slippery Rock
RouteState Highway 8
CountyButler County
StatePennsylvania
Coordinates41.04959, -80.00398
Functional classRural Principal Arterial - Other

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.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating89 US tons
Inventory rating53 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length105 ft (32 m)
Longest span103 ft (31.4 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,488 (2023)
Projected traffic5,700 by 2032
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 km)
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 SR0008 over Slippery Rock Creek built?

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

What condition is SR0008 over 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 SR0008 over Slippery Rock Creek carry?

About 4,488 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is SR0008 over Slippery Rock Creek?

The structure is 105 ft (32 m) long with a longest span of 103 ft (31.4 m) and a deck 43 ft wide.

Who owns SR0008 over Slippery Rock Creek?

It is owned by the State Highway Agency.