US Bridges

SR 646-PA 646 over Foster Brook

Good

McKean County, Pennsylvania · Gilmore · Structure no. 000000000054417

Built
2017
8 years old
Condition
Good
inspected August 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
32 ft
1 main span
Daily traffic
1,044
2024 count
Owner
State
State Highway Agency

About this bridge

SR 646-PA 646 over Foster Brook is a prestressed concrete box beam or girders - multiple carrying SR 646-PA 646 over Foster Brook in McKean County, Pennsylvania. It was built in 2017, so it is 8 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,044 vehicles a day, roughly 6% of them trucks, projected to reach 1,741 by 2043. The structure is 32 ft (9.8 m) long and 39 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

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CarriesSR 646-PA 646
CrossesFoster Brook
LocationGilmore
RouteState Highway 646
CountyMcKean County
StatePennsylvania
Coordinates41.97203, -78.5665
Functional classRural Major Collector

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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating50 US tons
Inventory rating38.6 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length32 ft (9.8 m)
Longest span32 ft (9.8 m)
Deck width39 ft (12 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,044 (2024)
Projected traffic1,741 by 2043
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 646-PA 646 over Foster Brook built?

It was built in 2017, making it 8 years old in 2025.

What condition is SR 646-PA 646 over Foster Brook 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 August 2023.

How much traffic does SR 646-PA 646 over Foster Brook carry?

About 1,044 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is SR 646-PA 646 over Foster Brook?

The structure is 32 ft (9.8 m) long with a longest span of 32 ft (9.8 m) and a deck 39 ft wide.

Who owns SR 646-PA 646 over Foster Brook?

It is owned by the State Highway Agency.