US Bridges

SR 322-US 322 W.B. over SR 4006

Good

Mifflin County, Pennsylvania · North Milroy · Structure no. 000000000040641

Built
1999
26 years old
Condition
Good
inspected May 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
93 ft
1 main span
Daily traffic
8,666
2024 count
Owner
State
State Highway Agency

About this bridge

SR 322-US 322 W.B. over SR 4006 is a prestressed concrete box beam or girders - multiple carrying SR 322-US 322 W.B. over SR 4006 in Mifflin County, Pennsylvania. It was built in 1999, so it is 26 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 8,666 vehicles a day, roughly 21% of them trucks, projected to reach 8,524 by 2044. The structure is 93 ft (28.3 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesSR 322-US 322 W.B.
CrossesSR 4006
LocationNorth Milroy
RouteU.S. Route 322
CountyMifflin County
StatePennsylvania
Coordinates40.71059, -77.59867
Functional classRural Principal Arterial - Other

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 inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating89 US tons
Inventory rating48 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length93 ft (28.3 m)
Longest span89 ft (27.1 m)
Deck width44 ft (13.3 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,666 (2024)
Projected traffic8,524 by 2044
Trucks21%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 322-US 322 W.B. over SR 4006 built?

It was built in 1999, making it 26 years old in 2025.

What condition is SR 322-US 322 W.B. over SR 4006 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 May 2024.

How much traffic does SR 322-US 322 W.B. over SR 4006 carry?

About 8,666 vehicles per day (2024 count), of which roughly 21% are trucks.

How long is SR 322-US 322 W.B. over SR 4006?

The structure is 93 ft (28.3 m) long with a longest span of 89 ft (27.1 m) and a deck 44 ft wide.

Who owns SR 322-US 322 W.B. over SR 4006?

It is owned by the State Highway Agency.