US Bridges

Mill ROAD(T360) over Threemile Run

FairPosted for load

Bucks County, Pennsylvania · West Rockhill TWP.2807J10 · Structure no. 000000000007513

Built
1930
95 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
29 ft
1 main span
Daily traffic
200
2001 count
Owner
County
County Highway Agency

About this bridge

Mill ROAD(T360) over Threemile Run is a steel stringer/multi-beam or girder carrying Mill ROAD(T360) over Threemile Run in Bucks County, Pennsylvania. It was built in 1930, so it is 95 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. Its operating status is: posted for load restriction.

It carries about 200 vehicles a day, projected to reach 280 by 2013. The structure is 29 ft (8.8 m) long and 20 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesMill ROAD(T360)
CrossesThreemile Run
LocationWest Rockhill TWP.2807J10
RouteCity Street 0
CountyBucks County
StatePennsylvania
Coordinates40.37963, -75.31943
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusPosted for load 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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83 US tons
Inventory rating49.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length29 ft (8.8 m)
Longest span28 ft (8.5 m)
Deck width20 ft (6.1 m)
Roadway width17 ft (5.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2001)
Projected traffic280 by 2013
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$68,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Mill ROAD(T360) over Threemile Run built?

It was built in 1930, making it 95 years old in 2025.

What condition is Mill ROAD(T360) over Threemile 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 May 2024.

How much traffic does Mill ROAD(T360) over Threemile Run carry?

About 200 vehicles per day (2001 count).

How long is Mill ROAD(T360) over Threemile Run?

The structure is 29 ft (8.8 m) long with a longest span of 28 ft (8.5 m) and a deck 20 ft wide.

Who owns Mill ROAD(T360) over Threemile Run?

It is owned by the County Highway Agency.