US Bridges

T-551 Mosqt.Hol.Rd over Six Mile Run

Fair

Bedford County, Pennsylvania · Defiance · Structure no. 000000000004464

Built
2006
19 years old
Condition
Fair
inspected October 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
45 ft
1 main span
Daily traffic
474
2022 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

T-551 Mosqt.Hol.Rd over Six Mile Run is a prestressed concrete box beam or girders - multiple carrying T-551 Mosqt.Hol.Rd over Six Mile Run in Bedford County, Pennsylvania. It was built in 2006, so it is 19 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 6 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 474 vehicles a day, roughly 10% of them trucks, projected to reach 99 by 2042. The structure is 45 ft (13.7 m) long and 31 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesT-551 Mosqt.Hol.Rd
CrossesSix Mile Run
LocationDefiance
RouteCity Street 0
CountyBedford County
StatePennsylvania
Coordinates40.1616, -78.22473
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68 US tons
Inventory rating41 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length45 ft (13.7 m)
Longest span44 ft (13.4 m)
Deck width31 ft (9.6 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic474 (2022)
Projected traffic99 by 2042
Trucks10%
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

OwnerTown or Township Highway Agency
Maintained byTown or Township 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-551 Mosqt.Hol.Rd over Six Mile Run built?

It was built in 2006, making it 19 years old in 2025.

What condition is T-551 Mosqt.Hol.Rd over Six Mile Run 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 October 2024.

How much traffic does T-551 Mosqt.Hol.Rd over Six Mile Run carry?

About 474 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is T-551 Mosqt.Hol.Rd over Six Mile Run?

The structure is 45 ft (13.7 m) long with a longest span of 44 ft (13.4 m) and a deck 31 ft wide.

Who owns T-551 Mosqt.Hol.Rd over Six Mile Run?

It is owned by the Town or Township Highway Agency.