US Bridges

T408 Happy Hill RD over Little Trough Creek

Fair

Huntingdon County, Pennsylvania · 1 Mi.N.Of Calvin · Structure no. 000000000018948

Built
1989
36 years old
Condition
Fair
inspected May 2023
Type
Culvert
Concrete
Length
21 ft
2 main spans
Daily traffic
50
2023 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

T408 Happy Hill RD over Little Trough Creek is a concrete culvert carrying T408 Happy Hill RD over Little Trough Creek in Huntingdon County, Pennsylvania. It was built in 1989, so it is 36 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 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 50 vehicles a day, roughly 10% of them trucks, projected to reach 55 by 2043. The structure is 21 ft (6.4 m) long and 19 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesT408 Happy Hill RD
CrossesLittle Trough Creek
Location1 Mi.N.Of Calvin
RouteCity Street 0
CountyHuntingdon County
StatePennsylvania
Coordinates40.34266, -78.02304
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 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
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72 US tons
Inventory rating43 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 25 or greater
Structure length21 ft (6.4 m)
Longest span10 ft (3 m)
Deck width19 ft (5.8 m)
Roadway width18 ft (5.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2023)
Projected traffic55 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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 T408 Happy Hill RD over Little Trough Creek built?

It was built in 1989, making it 36 years old in 2025.

What condition is T408 Happy Hill RD over Little Trough 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 T408 Happy Hill RD over Little Trough Creek carry?

About 50 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is T408 Happy Hill RD over Little Trough Creek?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m) and a deck 19 ft wide.

Who owns T408 Happy Hill RD over Little Trough Creek?

It is owned by the Town or Township Highway Agency.