US Bridges

Portersville Road over Slippery Rock Creek

Good

Lawrence County, Pennsylvania · 300 Ft SW of SR 2003 · Structure no. 000000000022341

Built
1932
93 years old, rebuilt 2018
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
312 ft
2 main spans
Daily traffic
4,988
2024 count
Owner
State
State Highway Agency

About this bridge

Portersville Road over Slippery Rock Creek is a steel continuous stringer/multi-beam or girder carrying Portersville Road over Slippery Rock Creek in Lawrence County, Pennsylvania. It was built in 1932 and reconstructed in 2018, so it is 93 years old, older 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 4,988 vehicles a day, roughly 10% of them trucks, projected to reach 7,720 by 2032. The structure is 312 ft (95.1 m) long and 37 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesPortersville Road
CrossesSlippery Rock Creek
Location300 Ft SW of SR 2003
RouteState Highway 488
Coordinates40.86112, -80.24333
Functional classUrban Minor Arterial

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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.6 US tons
Inventory rating41.4 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length312 ft (95.1 m)
Longest span167 ft (50.9 m)
Deck width37 ft (11.3 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,988 (2024)
Projected traffic7,720 by 2032
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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$1.5 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Portersville Road over Slippery Rock Creek built?

It was built in 1932, making it 93 years old in 2025. It was reconstructed in 2018.

What condition is Portersville Road 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 July 2024.

How much traffic does Portersville Road over Slippery Rock Creek carry?

About 4,988 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Portersville Road over Slippery Rock Creek?

The structure is 312 ft (95.1 m) long with a longest span of 167 ft (50.9 m) and a deck 37 ft wide.

Who owns Portersville Road over Slippery Rock Creek?

It is owned by the State Highway Agency.