US Bridges

SR 99 - I 99 over T-422

Good

Centre County, Pennsylvania · Bellefonte · Structure no. 000000000039496

Built
1997
28 years old
Condition
Good
inspected July 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
100 ft
1 main span
Daily traffic
9,981
2024 count
Owner
State
State Highway Agency

About this bridge

SR 99 - I 99 over T-422 is a prestressed concrete box beam or girders - multiple carrying SR 99 - I 99 over T-422 in Centre County, Pennsylvania. It was built in 1997, so it is 28 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 9,981 vehicles a day, roughly 18% of them trucks, projected to reach 11,401 by 2044. The structure is 100 ft (30.5 m) long and 65 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSR 99 - I 99
CrossesT-422
LocationBellefonte
RouteInterstate 99
Coordinates40.91062, -77.74141
Functional classUrban Principal Arterial - Interstate

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.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83 US tons
Inventory rating47 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length100 ft (30.5 m)
Longest span98 ft (29.9 m)
Deck width65 ft (19.7 m)
Roadway width61 ft (18.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,981 (2024)
Projected traffic11,401 by 2044
Trucks18%
Lanes on structure3
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-422 built?

It was built in 1997, making it 28 years old in 2025.

What condition is SR 99 - I 99 over T-422 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 July 2024.

How much traffic does SR 99 - I 99 over T-422 carry?

About 9,981 vehicles per day (2024 count), of which roughly 18% are trucks.

How long is SR 99 - I 99 over T-422?

The structure is 100 ft (30.5 m) long with a longest span of 98 ft (29.9 m) and a deck 65 ft wide.

Who owns SR 99 - I 99 over T-422?

It is owned by the State Highway Agency.