US Bridges

T-413 Coleman Mill over Allegheny River

Fair

McKean County, Pennsylvania · 1000 Ft SW of SR 6 · Structure no. 000000000025590

Built
1985
40 years old
Condition
Fair
inspected July 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
110 ft
1 main span
Daily traffic
150
2018 count
Owner
County
County Highway Agency

About this bridge

T-413 Coleman Mill over Allegheny River is a prestressed concrete box beam or girders - multiple carrying T-413 Coleman Mill over Allegheny River in McKean County, Pennsylvania. It was built in 1985, so it is 40 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 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 150 vehicles a day, roughly 2% of them trucks, projected to reach 290 by 2038. The structure is 110 ft (33.5 m) long and 24 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesT-413 Coleman Mill
CrossesAllegheny River
Location1000 Ft SW of SR 6
RouteCity Street 0
Coordinates41.7948, -78.2582
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69 US tons
Inventory rating12 US tons

Structure

MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length110 ft (33.5 m)
Longest span108 ft (32.9 m)
Deck width24 ft (7.4 m)
Roadway width21 ft (6.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2018)
Projected traffic290 by 2038
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was T-413 Coleman Mill over Allegheny River built?

It was built in 1985, making it 40 years old in 2025.

What condition is T-413 Coleman Mill over Allegheny River 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 T-413 Coleman Mill over Allegheny River carry?

About 150 vehicles per day (2018 count), of which roughly 2% are trucks.

How long is T-413 Coleman Mill over Allegheny River?

The structure is 110 ft (33.5 m) long with a longest span of 108 ft (32.9 m) and a deck 24 ft wide.

Who owns T-413 Coleman Mill over Allegheny River?

It is owned by the County Highway Agency.