US Bridges

SR 4002 Coal Hill over Big Run

Fair

Mercer County, Pennsylvania · West Salem Township · Structure no. 000000000026032

Built
1977
48 years old
Condition
Fair
inspected April 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
71 ft
1 main span
Daily traffic
220
2024 count
Owner
State
State Highway Agency

About this bridge

SR 4002 Coal Hill over Big Run is a prestressed concrete box beam or girders - multiple carrying SR 4002 Coal Hill over Big Run in Mercer County, Pennsylvania. It was built in 1977, so it is 48 years old, younger 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 6 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 220 vehicles a day, roughly 5% of them trucks, projected to reach 255 by 2032. The structure is 71 ft (21.6 m) long and 46 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesSR 4002 Coal Hill
CrossesBig Run
LocationWest Salem Township
RouteState Highway 0
CountyMercer County
StatePennsylvania
Coordinates41.37382, -80.43055
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating86 US tons
Inventory rating20 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length71 ft (21.6 m)
Longest span70 ft (21.3 m)
Deck width46 ft (13.9 m)
Roadway width42 ft (12.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic220 (2024)
Projected traffic255 by 2032
Trucks5%
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 proposedDeck rehabilitation with only incidental widening
Estimated improvement cost$66,000
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 4002 Coal Hill over Big Run built?

It was built in 1977, making it 48 years old in 2025.

What condition is SR 4002 Coal Hill 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 April 2023.

How much traffic does SR 4002 Coal Hill over Big Run carry?

About 220 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is SR 4002 Coal Hill over Big Run?

The structure is 71 ft (21.6 m) long with a longest span of 70 ft (21.3 m) and a deck 46 ft wide.

Who owns SR 4002 Coal Hill over Big Run?

It is owned by the State Highway Agency.