US Bridges

SR 346-PA 346 over Knapp Creek

Fair

McKean County, Pennsylvania · Duke Center · Structure no. 000000000025427

Built
1929
96 years old, rebuilt 2010
Condition
Fair
inspected August 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
33 ft
1 main span
Daily traffic
1,255
2024 count
Owner
State
State Highway Agency

About this bridge

SR 346-PA 346 over Knapp Creek is a prestressed concrete box beam or girders - multiple carrying SR 346-PA 346 over Knapp Creek in McKean County, Pennsylvania. It was built in 1929 and reconstructed in 2010, so it is 96 years old, older 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 5 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 1,255 vehicles a day, roughly 4% of them trucks, projected to reach 1,087 by 2043. The structure is 33 ft (10.1 m) long and 33 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesSR 346-PA 346
CrossesKnapp Creek
LocationDuke Center
RouteState Highway 346
CountyMcKean County
StatePennsylvania
Coordinates41.95375, -78.48274
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating80 US tons
Inventory rating43 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length33 ft (10.1 m)
Longest span30 ft (9.1 m)
Deck width33 ft (10.2 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,255 (2024)
Projected traffic1,087 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$423,000
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 346-PA 346 over Knapp Creek built?

It was built in 1929, making it 96 years old in 2025. It was reconstructed in 2010.

What condition is SR 346-PA 346 over Knapp Creek 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 August 2023.

How much traffic does SR 346-PA 346 over Knapp Creek carry?

About 1,255 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is SR 346-PA 346 over Knapp Creek?

The structure is 33 ft (10.1 m) long with a longest span of 30 ft (9.1 m) and a deck 33 ft wide.

Who owns SR 346-PA 346 over Knapp Creek?

It is owned by the State Highway Agency.