US Bridges

T-666 Barks Hill over South Branch Plum Creek

Fair

Armstrong County, Pennsylvania · 1500 Feet S. of SR 4009 · Structure no. 000000000041336

Built
2001
24 years old
Condition
Fair
inspected May 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
83 ft
1 main span
Daily traffic
140
2019 count
Owner
County
County Highway Agency

About this bridge

T-666 Barks Hill over South Branch Plum Creek is a prestressed concrete box beam or girders - multiple carrying T-666 Barks Hill over South Branch Plum Creek in Armstrong County, Pennsylvania. It was built in 2001, so it is 24 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 140 vehicles a day, roughly 9% of them trucks, projected to reach 196 by 2039. The structure is 83 ft (25.3 m) long and 29 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesT-666 Barks Hill
CrossesSouth Branch Plum Creek
Location1500 Feet S. of SR 4009
RouteCity Street 0
Coordinates40.72413, -79.27556
Functional classRural Local

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating74 US tons
Inventory rating40 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length83 ft (25.3 m)
Longest span81 ft (24.7 m)
Deck width29 ft (8.7 m)
Roadway width26 ft (7.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic140 (2019)
Projected traffic196 by 2039
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was T-666 Barks Hill over South Branch Plum Creek built?

It was built in 2001, making it 24 years old in 2025.

What condition is T-666 Barks Hill over South Branch Plum 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 May 2023.

How much traffic does T-666 Barks Hill over South Branch Plum Creek carry?

About 140 vehicles per day (2019 count), of which roughly 9% are trucks.

How long is T-666 Barks Hill over South Branch Plum Creek?

The structure is 83 ft (25.3 m) long with a longest span of 81 ft (24.7 m) and a deck 29 ft wide.

Who owns T-666 Barks Hill over South Branch Plum Creek?

It is owned by the County Highway Agency.