US Bridges

T-405 (creek Road) over Mahanoy Creek

Good

Northumberland County, Pennsylvania · East of Dornsife · Structure no. 000000000029340

Built
1975
50 years old
Condition
Good
inspected March 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
152 ft
2 main spans
Daily traffic
75
2018 count
Owner
County
County Highway Agency

About this bridge

T-405 (creek Road) over Mahanoy Creek is a prestressed concrete box beam or girders - multiple carrying T-405 (creek Road) over Mahanoy Creek in Northumberland County, Pennsylvania. It was built in 1975, so it is 50 years old, younger than the Pennsylvania average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 75 vehicles a day, roughly 2% of them trucks, projected to reach 116 by 2040. The structure is 152 ft (46.3 m) long and 30 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesT-405 (creek Road)
CrossesMahanoy Creek
LocationEast of Dornsife
RouteCity Street 0T405
Coordinates40.7546, -76.75706
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating32 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length152 ft (46.3 m)
Longest span74 ft (22.6 m)
Deck width30 ft (9.1 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic75 (2018)
Projected traffic116 by 2040
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was T-405 (creek Road) over Mahanoy Creek built?

It was built in 1975, making it 50 years old in 2025.

What condition is T-405 (creek Road) over Mahanoy Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2024.

How much traffic does T-405 (creek Road) over Mahanoy Creek carry?

About 75 vehicles per day (2018 count), of which roughly 2% are trucks.

How long is T-405 (creek Road) over Mahanoy Creek?

The structure is 152 ft (46.3 m) long with a longest span of 74 ft (22.6 m) and a deck 30 ft wide.

Who owns T-405 (creek Road) over Mahanoy Creek?

It is owned by the County Highway Agency.