US Bridges

T-347 Old Trail RD over W. Br. Mahantango

Fair

Snyder County, Pennsylvania · 1.25 Mi.Sw Mckees Half Fa · Structure no. 000000000031284

Built
1988
37 years old
Condition
Fair
inspected September 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
146 ft
2 main spans
Daily traffic
300
2009 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

T-347 Old Trail RD over W. Br. Mahantango is a prestressed concrete continuous box beam or girders - multiple carrying T-347 Old Trail RD over W. Br. Mahantango in Snyder County, Pennsylvania. It was built in 1988, so it is 37 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 300 vehicles a day, roughly 5% of them trucks, projected to reach 450 by 2029. The structure is 146 ft (44.5 m) long and 31 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesT-347 Old Trail RD
CrossesW. Br. Mahantango
Location1.25 Mi.Sw Mckees Half Fa
RouteCity Street 0
Coordinates40.64806, -76.94302
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating46 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length146 ft (44.5 m)
Longest span73 ft (22.3 m)
Deck width31 ft (9.3 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic300 (2009)
Projected traffic450 by 2029
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 T-347 Old Trail RD over W. Br. Mahantango built?

It was built in 1988, making it 37 years old in 2025.

What condition is T-347 Old Trail RD over W. Br. Mahantango 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 September 2023.

How much traffic does T-347 Old Trail RD over W. Br. Mahantango carry?

About 300 vehicles per day (2009 count), of which roughly 5% are trucks.

How long is T-347 Old Trail RD over W. Br. Mahantango?

The structure is 146 ft (44.5 m) long with a longest span of 73 ft (22.3 m) and a deck 31 ft wide.

Who owns T-347 Old Trail RD over W. Br. Mahantango?

It is owned by the Town or Township Highway Agency.