US Bridges

SR 846 Orngvlle RD over Chestnut Run

Fair

Mercer County, Pennsylvania · Pymatuning Township · Structure no. 000000000025898

Built
1938
87 years old, rebuilt 1986
Condition
Fair
inspected November 2022
Type
Slab
Prestressed Concrete
Length
24 ft
1 main span
Daily traffic
1,985
2024 count
Owner
State
State Highway Agency

About this bridge

SR 846 Orngvlle RD over Chestnut Run is a prestressed concrete slab carrying SR 846 Orngvlle RD over Chestnut Run in Mercer County, Pennsylvania. It was built in 1938 and reconstructed in 1986, so it is 87 years old, older 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 1,985 vehicles a day, roughly 13% of them trucks, projected to reach 2,847 by 2032. The structure is 24 ft (7.3 m) long and 24 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

CarriesSR 846 Orngvlle RD
CrossesChestnut Run
LocationPymatuning Township
RouteState Highway 846
Coordinates41.33478, -80.45418
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71 US tons
Inventory rating42 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length24 ft (7.3 m)
Longest span22 ft (6.7 m)
Deck width24 ft (7.3 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,985 (2024)
Projected traffic2,847 by 2032
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 Chestnut Run built?

It was built in 1938, making it 87 years old in 2025. It was reconstructed in 1986.

What condition is SR 846 Orngvlle RD over Chestnut Run 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 November 2022.

How much traffic does SR 846 Orngvlle RD over Chestnut Run carry?

About 1,985 vehicles per day (2024 count), of which roughly 13% are trucks.

How long is SR 846 Orngvlle RD over Chestnut Run?

The structure is 24 ft (7.3 m) long with a longest span of 22 ft (6.7 m) and a deck 24 ft wide.

Who owns SR 846 Orngvlle RD over Chestnut Run?

It is owned by the State Highway Agency.