US Bridges

SR 158 Mercer Rd. over Little Neshannock Creek

Good

Mercer County, Pennsylvania · Wilmington Township · Structure no. 000000000046213

Built
2010
15 years old
Condition
Good
inspected May 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
90 ft
1 main span
Daily traffic
2,645
2024 count
Owner
State
State Highway Agency

About this bridge

SR 158 Mercer Rd. over Little Neshannock Creek is a prestressed concrete box beam or girders - multiple carrying SR 158 Mercer Rd. over Little Neshannock Creek in Mercer County, Pennsylvania. It was built in 2010, so it is 15 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 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 2,645 vehicles a day, roughly 8% of them trucks, projected to reach 2,834 by 2032. The structure is 90 ft (27.4 m) long and 31 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesSR 158 Mercer Rd.
CrossesLittle Neshannock Creek
LocationWilmington Township
RouteState Highway 158
Coordinates41.13709, -80.31942
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
Deck8 Very GoodNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating85 US tons
Inventory rating41 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length90 ft (27.4 m)
Longest span87 ft (26.5 m)
Deck width31 ft (9.6 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,645 (2024)
Projected traffic2,834 by 2032
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 158 Mercer Rd. over Little Neshannock Creek built?

It was built in 2010, making it 15 years old in 2025.

What condition is SR 158 Mercer Rd. over Little Neshannock 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 May 2024.

How much traffic does SR 158 Mercer Rd. over Little Neshannock Creek carry?

About 2,645 vehicles per day (2024 count), of which roughly 8% are trucks.

How long is SR 158 Mercer Rd. over Little Neshannock Creek?

The structure is 90 ft (27.4 m) long with a longest span of 87 ft (26.5 m) and a deck 31 ft wide.

Who owns SR 158 Mercer Rd. over Little Neshannock Creek?

It is owned by the State Highway Agency.