US Bridges

SR 4003 over Mill Run

Fair

Blair County, Pennsylvania · Altoona Beale Av 31st.ST. · Structure no. 000000000005803

Built
1958
67 years old, rebuilt 1981
Condition
Fair
inspected March 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
33 ft
1 main span
Daily traffic
5,124
2024 count
Owner
State
State Highway Agency

About this bridge

SR 4003 over Mill Run is a prestressed concrete box beam or girders - multiple carrying SR 4003 over Mill Run in Blair County, Pennsylvania. It was built in 1958 and reconstructed in 1981, so it is 67 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 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 5,124 vehicles a day, roughly 6% of them trucks, projected to reach 7,539 by 2032. The structure is 33 ft (10.1 m) long and 64 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSR 4003
CrossesMill Run
LocationAltoona Beale Av 31st.ST.
RouteState Highway 0
CountyBlair County
StatePennsylvania
Coordinates40.49695, -78.41632
Functional classUrban Other Principal Arterial

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating61.9 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length33 ft (10.1 m)
Longest span32 ft (9.8 m)
Deck width64 ft (19.4 m)
Roadway width51 ft (15.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,124 (2024)
Projected traffic7,539 by 2032
Trucks6%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 4003 over Mill Run built?

It was built in 1958, making it 67 years old in 2025. It was reconstructed in 1981.

What condition is SR 4003 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 March 2023.

How much traffic does SR 4003 over Mill Run carry?

About 5,124 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is SR 4003 over Mill Run?

The structure is 33 ft (10.1 m) long with a longest span of 32 ft (9.8 m) and a deck 64 ft wide.

Who owns SR 4003 over Mill Run?

It is owned by the State Highway Agency.