US Bridges

SR 846 Orngvlle.Rd over Over Big Run Trib

Poor

Mercer County, Pennsylvania · West Salem Township · Structure no. 000000000025900

Built
1910
115 years old, rebuilt 1984
Condition
Poor
inspected April 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
25 ft
1 main span
Daily traffic
741
2024 count
Owner
State
State Highway Agency

About this bridge

SR 846 Orngvlle.Rd over Over Big Run Trib is a prestressed concrete box beam or girders - multiple carrying SR 846 Orngvlle.Rd over Over Big Run Trib in Mercer County, Pennsylvania. It was built in 1910 and reconstructed in 1984, so it is 115 years old, older than the Pennsylvania average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 741 vehicles a day, roughly 7% of them trucks, projected to reach 1,703 by 2032. The structure is 25 ft (7.6 m) long and 24 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesSR 846 Orngvlle.Rd
CrossesOver Big Run Trib
LocationWest Salem Township
RouteState Highway 846
Coordinates41.38701, -80.43813
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
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
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
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 rating63.1 US tons
Inventory rating37 US tons

Structure

MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length25 ft (7.6 m)
Longest span24 ft (7.3 m)
Deck width24 ft (7.4 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic741 (2024)
Projected traffic1,703 by 2032
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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$24,000
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 846 Orngvlle.Rd over Over Big Run Trib built?

It was built in 1910, making it 115 years old in 2025. It was reconstructed in 1984.

What condition is SR 846 Orngvlle.Rd over Over Big Run Trib in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2024.

How much traffic does SR 846 Orngvlle.Rd over Over Big Run Trib carry?

About 741 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is SR 846 Orngvlle.Rd over Over Big Run Trib?

The structure is 25 ft (7.6 m) long with a longest span of 24 ft (7.3 m) and a deck 24 ft wide.

Who owns SR 846 Orngvlle.Rd over Over Big Run Trib?

It is owned by the State Highway Agency.