US Bridges

T-684 Middlebury over North Run

Fair

Tioga County, Pennsylvania · 0.9 MI NW of Holliday · Structure no. 000000000033301

Built
1947
78 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
37 ft
1 main span
Daily traffic
200
2021 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

T-684 Middlebury over North Run is a steel stringer/multi-beam or girder carrying T-684 Middlebury over North Run in Tioga County, Pennsylvania. It was built in 1947, so it is 78 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 200 vehicles a day, roughly 5% of them trucks, projected to reach 309 by 2043. The structure is 37 ft (11.3 m) long and 25 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesT-684 Middlebury
CrossesNorth Run
Location0.9 MI NW of Holliday
RouteCity Street 0
Coordinates41.86616, -77.25028
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJuly 2023
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
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating71 US tons
Inventory rating43 US tons

Structure

MaterialSteel
DeckClosed grating
Main spans1
Design loadHS 20
Structure length37 ft (11.3 m)
Longest span36 ft (11 m)
Deck width25 ft (7.5 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2021)
Projected traffic309 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$83,000
NavigationNo navigation control on waterway

Frequently asked questions

When was T-684 Middlebury over North Run built?

It was built in 1947, making it 78 years old in 2025.

What condition is T-684 Middlebury over North 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 July 2023.

How much traffic does T-684 Middlebury over North Run carry?

About 200 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is T-684 Middlebury over North Run?

The structure is 37 ft (11.3 m) long with a longest span of 36 ft (11 m) and a deck 25 ft wide.

Who owns T-684 Middlebury over North Run?

It is owned by the Town or Township Highway Agency.