US Bridges

T-480 over Mahanoy Creek

PoorClosed to traffic

Northumberland County, Pennsylvania · 1.9 Mi. N of Leck Kill · Structure no. 000000000029388

Built
1910
115 years old
Condition
Poor
inspected March 2023
Type
Truss - Thru
Steel
Length
115 ft
1 main span
Daily traffic
—
2012 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

T-480 over Mahanoy Creek is a steel truss - thru carrying T-480 over Mahanoy Creek in Northumberland County, Pennsylvania. It was built in 1910, so it is 115 years old, older than the Pennsylvania average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 1 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: closed to all traffic.

No traffic count is recorded. The structure is 115 ft (35.1 m) long and 16 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

CarriesT-480
CrossesMahanoy Creek
Location1.9 Mi. N of Leck Kill
RouteCity Street 0
Coordinates40.74309, -76.62416
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure1 Imminent FailureMajor deterioration or section loss present in critical structural components. Bridge is closed to traffic but corrective action may put it back in light service.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusClosed to all traffic
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation0: Immediate repair necessary to put back in service
Deck geometry0: Immediate repair necessary to put back in service
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating0 US tons
Inventory rating0 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length115 ft (35.1 m)
Longest span113 ft (34.4 m)
Deck width16 ft (4.9 m)
Roadway width16 ft (4.8 m)
Vertical clearance over deck13 ft (3.9 m)

Traffic and service

Average daily traffic—
Projected traffic—
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$108,000
NavigationNo navigation control on waterway

Frequently asked questions

When was T-480 over Mahanoy Creek built?

It was built in 1910, making it 115 years old in 2025.

What condition is T-480 over Mahanoy Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in March 2023.

How much traffic does T-480 over Mahanoy Creek carry?

No traffic count is recorded for this structure.

How long is T-480 over Mahanoy Creek?

The structure is 115 ft (35.1 m) long with a longest span of 113 ft (34.4 m) and a deck 16 ft wide.

Who owns T-480 over Mahanoy Creek?

It is owned by the Town or Township Highway Agency.