US Bridges

Dunbar Bridge T320 over Raccoon Creek

Good

Washington County, Pennsylvania · @ T843/T700 Intersection · Structure no. 000000000035334

Built
1889
136 years old, rebuilt 2016
Condition
Good
inspected July 2023
Type
Truss - Thru
Steel
Length
64 ft
1 main span
Daily traffic
15
2016 count
Owner
County
County Highway Agency

About this bridge

Dunbar Bridge T320 over Raccoon Creek is a steel truss - thru carrying Dunbar Bridge T320 over Raccoon Creek in Washington County, Pennsylvania. It was built in 1889 and reconstructed in 2016, so it is 136 years old, older than the Pennsylvania average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 15 vehicles a day, projected to reach 15 by 2016. The structure is 64 ft (19.5 m) long and 14 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesDunbar Bridge T320
CrossesRaccoon Creek
Location@ T843/T700 Intersection
RouteCity Street 0T320
CountyWashington County
StatePennsylvania
Coordinates40.40375, -80.36336
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating89 US tons
Inventory rating53 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHL 93
Structure length64 ft (19.5 m)
Longest span59 ft (18 m)
Deck width14 ft (4.3 m)
Roadway width12 ft (3.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15 (2016)
Projected traffic15 by 2016
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$28,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Dunbar Bridge T320 over Raccoon Creek built?

It was built in 1889, making it 136 years old in 2025. It was reconstructed in 2016.

What condition is Dunbar Bridge T320 over Raccoon Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2023.

How much traffic does Dunbar Bridge T320 over Raccoon Creek carry?

About 15 vehicles per day (2016 count).

How long is Dunbar Bridge T320 over Raccoon Creek?

The structure is 64 ft (19.5 m) long with a longest span of 59 ft (18 m) and a deck 14 ft wide.

Who owns Dunbar Bridge T320 over Raccoon Creek?

It is owned by the County Highway Agency.