US Bridges

T-434 over Mosquito Creek

Good

Lycoming County, Pennsylvania · 0.9 Mi. S. Junc. Pa 654 · Structure no. 000000000025057

Built
1940
85 years old, rebuilt 2010
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
50 ft
1 main span
Daily traffic
300
2023 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

T-434 over Mosquito Creek is a steel stringer/multi-beam or girder carrying T-434 over Mosquito Creek in Lycoming County, Pennsylvania. It was built in 1940 and reconstructed in 2010, so it is 85 years old, older 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 300 vehicles a day, roughly 5% of them trucks, projected to reach 464 by 2045. The structure is 50 ft (15.2 m) long and 26 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesT-434
CrossesMosquito Creek
Location0.9 Mi. S. Junc. Pa 654
RouteCity Street 0
Coordinates41.21171, -77.03009
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64 US tons
Inventory rating38 US tons

Structure

MaterialSteel
DeckOpen grating
Main spans1
Design loadHS 20
Structure length50 ft (15.2 m)
Longest span48 ft (14.6 m)
Deck width26 ft (7.9 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic300 (2023)
Projected traffic464 by 2045
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$122,000
NavigationNo navigation control on waterway

Frequently asked questions

When was T-434 over Mosquito Creek built?

It was built in 1940, making it 85 years old in 2025. It was reconstructed in 2010.

What condition is T-434 over Mosquito 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 September 2023.

How much traffic does T-434 over Mosquito Creek carry?

About 300 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is T-434 over Mosquito Creek?

The structure is 50 ft (15.2 m) long with a longest span of 48 ft (14.6 m) and a deck 26 ft wide.

Who owns T-434 over Mosquito Creek?

It is owned by the Town or Township Highway Agency.