US Bridges

SR4004 over Mill Run

Fair

Jefferson County, Pennsylvania · Mill Run NO.1 · Structure no. 000000000019808

Built
1961
64 years old
Condition
Fair
inspected May 2023
Type
Tee Beam
Concrete
Length
34 ft
1 main span
Daily traffic
174
2024 count
Owner
State
State Highway Agency

About this bridge

SR4004 over Mill Run is a concrete tee beam carrying SR4004 over Mill Run in Jefferson County, Pennsylvania. It was built in 1961, so it is 64 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 174 vehicles a day, roughly 10% of them trucks, projected to reach 237 by 2032. The structure is 34 ft (10.4 m) long and 36 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesSR4004
CrossesMill Run
LocationMill Run NO.1
RouteState Highway 0
CountyJefferson County
StatePennsylvania
Coordinates41.21187, -79.12466
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67 US tons
Inventory rating40 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length34 ft (10.4 m)
Longest span33 ft (10.1 m)
Deck width36 ft (10.9 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic174 (2024)
Projected traffic237 by 2032
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 SR4004 over Mill Run built?

It was built in 1961, making it 64 years old in 2025.

What condition is SR4004 over Mill 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 2023.

How much traffic does SR4004 over Mill Run carry?

About 174 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is SR4004 over Mill Run?

The structure is 34 ft (10.4 m) long with a longest span of 33 ft (10.1 m) and a deck 36 ft wide.

Who owns SR4004 over Mill Run?

It is owned by the State Highway Agency.