US Bridges

T-476 Allen Bridge over Two Lick Reservoir

Fair

Indiana County, Pennsylvania · Btw T639 & T760 · Structure no. 000000000019473

Built
1968
57 years old
Condition
Fair
inspected November 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
206 ft
3 main spans
Daily traffic
25
2023 count
Owner
County
County Highway Agency

About this bridge

T-476 Allen Bridge over Two Lick Reservoir is a prestressed concrete box beam or girders - multiple carrying T-476 Allen Bridge over Two Lick Reservoir in Indiana County, Pennsylvania. It was built in 1968, so it is 57 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 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 25 vehicles a day, roughly 1% of them trucks, projected to reach 50 by 2043. The structure is 206 ft (62.8 m) long and 24 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesT-476 Allen Bridge
CrossesTwo Lick Reservoir
LocationBtw T639 & T760
RouteCity Street 0
Coordinates40.62802, -79.05898
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
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 rating59 US tons
Inventory rating13 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length206 ft (62.8 m)
Longest span69 ft (21 m)
Deck width24 ft (7.4 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2023)
Projected traffic50 by 2043
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 proposedDeck rehabilitation with only incidental widening
Estimated improvement cost$311,000
NavigationNo navigation control on waterway

Frequently asked questions

When was T-476 Allen Bridge over Two Lick Reservoir built?

It was built in 1968, making it 57 years old in 2025.

What condition is T-476 Allen Bridge over Two Lick Reservoir 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 November 2023.

How much traffic does T-476 Allen Bridge over Two Lick Reservoir carry?

About 25 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is T-476 Allen Bridge over Two Lick Reservoir?

The structure is 206 ft (62.8 m) long with a longest span of 69 ft (21 m) and a deck 24 ft wide.

Who owns T-476 Allen Bridge over Two Lick Reservoir?

It is owned by the County Highway Agency.