US Bridges

SR4012 over Slippery Rock Creek

Good

Butler County, Pennsylvania · Boyer · Structure no. 000000000041329

Built
2001
24 years old
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
43 ft
1 main span
Daily traffic
253
2024 count
Owner
State
State Highway Agency

About this bridge

SR4012 over Slippery Rock Creek is a steel stringer/multi-beam or girder carrying SR4012 over Slippery Rock Creek in Butler County, Pennsylvania. It was built in 2001, so it is 24 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 253 vehicles a day, roughly 4% of them trucks, projected to reach 222 by 2032. The structure is 43 ft (13.1 m) long and 26 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

CarriesSR4012
CrossesSlippery Rock Creek
LocationBoyer
RouteState Highway 0
Coordinates41.10978, -79.88433
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating73 US tons
Inventory rating44 US tons

Structure

MaterialSteel
DeckOther
Main spans1
Design loadHS 25 or greater
Structure length43 ft (13.1 m)
Longest span42 ft (12.8 m)
Deck width26 ft (7.8 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic253 (2024)
Projected traffic222 by 2032
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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 SR4012 over Slippery Rock Creek built?

It was built in 2001, making it 24 years old in 2025.

What condition is SR4012 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 April 2024.

How much traffic does SR4012 over Slippery Rock Creek carry?

About 253 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is SR4012 over Slippery Rock Creek?

The structure is 43 ft (13.1 m) long with a longest span of 42 ft (12.8 m) and a deck 26 ft wide.

Who owns SR4012 over Slippery Rock Creek?

It is owned by the State Highway Agency.