US Bridges

T677 Schoolhouse H over Six Mile Run

Fair

Bedford County, Pennsylvania · Riddlesburg · Structure no. 000000000004469

Built
1977
48 years old
Condition
Fair
inspected November 2022
Type
Culvert
Steel
Length
31 ft
1 main span
Daily traffic
62
2020 count
Owner
County
County Highway Agency

About this bridge

T677 Schoolhouse H over Six Mile Run is a steel culvert carrying T677 Schoolhouse H over Six Mile Run in Bedford County, Pennsylvania. It was built in 1977, so it is 48 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 62 vehicles a day, projected to reach 78 by 2040. The structure is 31 ft (9.4 m) long. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesT677 Schoolhouse H
CrossesSix Mile Run
LocationRiddlesburg
RouteCity Street 0
CountyBedford County
StatePennsylvania
Coordinates40.16212, -78.25282
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48 US tons
Inventory rating29 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadHS 20
Structure length31 ft (9.4 m)
Longest span31 ft (9.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic62 (2020)
Projected traffic78 by 2040
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 T677 Schoolhouse H over Six Mile Run built?

It was built in 1977, making it 48 years old in 2025.

What condition is T677 Schoolhouse H 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 November 2022.

How much traffic does T677 Schoolhouse H over Six Mile Run carry?

About 62 vehicles per day (2020 count).

How long is T677 Schoolhouse H over Six Mile Run?

The structure is 31 ft (9.4 m) long with a longest span of 31 ft (9.4 m).

Who owns T677 Schoolhouse H over Six Mile Run?

It is owned by the County Highway Agency.