US Bridges

SR 4020 over Dunlap Creek

Fair

Fayette County, Pennsylvania · Redstone & Luzerne Twps. · Structure no. 000000000016999

Built
1952
73 years old
Condition
Fair
inspected March 2023
Type
Tee Beam
Concrete
Length
53 ft
1 main span
Daily traffic
883
2024 count
Owner
State
State Highway Agency

About this bridge

SR 4020 over Dunlap Creek is a concrete tee beam carrying SR 4020 over Dunlap Creek in Fayette County, Pennsylvania. It was built in 1952, so it is 73 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 883 vehicles a day, roughly 9% of them trucks, projected to reach 1,361 by 2032. The structure is 53 ft (16.2 m) long. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesSR 4020
CrossesDunlap Creek
LocationRedstone & Luzerne Twps.
RouteState Highway 0
CountyFayette County
StatePennsylvania
Coordinates39.97236, -79.88573
Functional classUrban 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
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66 US tons
Inventory rating40 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20 + Mod
Structure length53 ft (16.2 m)
Longest span52 ft (15.8 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic883 (2024)
Projected traffic1,361 by 2032
Trucks9%
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 4020 over Dunlap Creek built?

It was built in 1952, making it 73 years old in 2025.

What condition is SR 4020 over Dunlap Creek 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 March 2023.

How much traffic does SR 4020 over Dunlap Creek carry?

About 883 vehicles per day (2024 count), of which roughly 9% are trucks.

How long is SR 4020 over Dunlap Creek?

The structure is 53 ft (16.2 m) long with a longest span of 52 ft (15.8 m).

Who owns SR 4020 over Dunlap Creek?

It is owned by the State Highway Agency.