US Bridges

SR 99 - I 99 over T-425

Fair

Centre County, Pennsylvania · 4 MI SE Bellefonte · Structure no. 000000000009218

Built
1973
52 years old, rebuilt 2000
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
126 ft
1 main span
Daily traffic
10,076
2024 count
Owner
State
State Highway Agency

About this bridge

SR 99 - I 99 over T-425 is a steel stringer/multi-beam or girder carrying SR 99 - I 99 over T-425 in Centre County, Pennsylvania. It was built in 1973 and reconstructed in 2000, so it is 52 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 10,076 vehicles a day, roughly 18% of them trucks, projected to reach 11,801 by 2044. The structure is 126 ft (38.4 m) long and 48 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSR 99 - I 99
CrossesT-425
Location4 MI SE Bellefonte
RouteInterstate 99
Coordinates40.91052, -77.75
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating59 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length126 ft (38.4 m)
Longest span120 ft (36.6 m)
Deck width48 ft (14.6 m)
Roadway width45 ft (13.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,076 (2024)
Projected traffic11,801 by 2044
Trucks18%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR 99 - I 99 over T-425 built?

It was built in 1973, making it 52 years old in 2025. It was reconstructed in 2000.

What condition is SR 99 - I 99 over T-425 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 July 2024.

How much traffic does SR 99 - I 99 over T-425 carry?

About 10,076 vehicles per day (2024 count), of which roughly 18% are trucks.

How long is SR 99 - I 99 over T-425?

The structure is 126 ft (38.4 m) long with a longest span of 120 ft (36.6 m) and a deck 48 ft wide.

Who owns SR 99 - I 99 over T-425?

It is owned by the State Highway Agency.