US Bridges

Cossitt Road over Big Run

Fair

Mercer County, Pennsylvania · 3/4-MI West of Rt 18 · Structure no. 000000000026292

Built
1962
63 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
71 ft
1 main span
Daily traffic
89
2023 count
Owner
County
County Highway Agency

About this bridge

Cossitt Road over Big Run is a steel stringer/multi-beam or girder carrying Cossitt Road over Big Run in Mercer County, Pennsylvania. It was built in 1962, so it is 63 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 89 vehicles a day, roughly 4% of them trucks, projected to reach 80 by 2039. The structure is 71 ft (21.6 m) long and 27 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesCossitt Road
CrossesBig Run
Location3/4-MI West of Rt 18
RouteCity Street 7228
CountyMercer County
StatePennsylvania
Coordinates41.36759, -80.42116
Functional classRural Minor 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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81 US tons
Inventory rating48 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckOpen grating
Main spans1
Design loadHS 20
Structure length71 ft (21.6 m)
Longest span68 ft (20.7 m)
Deck width27 ft (8.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic89 (2023)
Projected traffic80 by 2039
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$1.7 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Cossitt Road over Big Run built?

It was built in 1962, making it 63 years old in 2025.

What condition is Cossitt Road over Big 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 May 2023.

How much traffic does Cossitt Road over Big Run carry?

About 89 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Cossitt Road over Big Run?

The structure is 71 ft (21.6 m) long with a longest span of 68 ft (20.7 m) and a deck 27 ft wide.

Who owns Cossitt Road over Big Run?

It is owned by the County Highway Agency.