US Bridges

Pa 104 over Trib No Br Mahantango CR

Fair

Snyder County, Pennsylvania · 1 MI S Village of Shadle · Structure no. 000000000031088

Built
1929
96 years old
Condition
Fair
inspected March 2024
Type
Tee Beam
Concrete
Length
27 ft
1 main span
Daily traffic
2,660
2024 count
Owner
State
State Highway Agency

About this bridge

Pa 104 over Trib No Br Mahantango CR is a concrete tee beam carrying Pa 104 over Trib No Br Mahantango CR in Snyder County, Pennsylvania. It was built in 1929, so it is 96 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 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 2,660 vehicles a day, roughly 15% of them trucks, projected to reach 3,040 by 2032. The structure is 27 ft (8.2 m) long and 33 ft wide. If it were closed, the detour would be 31.1 mi (50 km).

Location

Open in Google Maps
CarriesPa 104
CrossesTrib No Br Mahantango CR
Location1 MI S Village of Shadle
RouteState Highway 104
CountySnyder County
StatePennsylvania
Coordinates40.68876, -76.98453
Functional classRural Minor Arterial

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
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 rating64 US tons
Inventory rating38 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length27 ft (8.2 m)
Longest span26 ft (7.9 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,660 (2024)
Projected traffic3,040 by 2032
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed31.1 mi (50 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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$55,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Pa 104 over Trib No Br Mahantango CR built?

It was built in 1929, making it 96 years old in 2025.

What condition is Pa 104 over Trib No Br Mahantango CR 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 March 2024.

How much traffic does Pa 104 over Trib No Br Mahantango CR carry?

About 2,660 vehicles per day (2024 count), of which roughly 15% are trucks.

How long is Pa 104 over Trib No Br Mahantango CR?

The structure is 27 ft (8.2 m) long with a longest span of 26 ft (7.9 m) and a deck 33 ft wide.

Who owns Pa 104 over Trib No Br Mahantango CR?

It is owned by the State Highway Agency.