US Bridges

SR 4003 over Mill Run

Fair

Blair County, Pennsylvania · Altoona Logan Blvd. · Structure no. 000000000005800

Built
1962
63 years old, rebuilt 2007
Condition
Fair
inspected September 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
70 ft
2 main spans
Daily traffic
9,532
2023 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 1962 and reconstructed in 2007, so it is 63 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 9,532 vehicles a day, roughly 4% of them trucks, projected to reach 11,459 by 2032. The structure is 70 ft (21.3 m) long and 98 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSR 4003
CrossesMill Run
LocationAltoona Logan Blvd.
RouteState Highway 0
CountyBlair County
StatePennsylvania
Coordinates40.48041, -78.40479
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.
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 inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating49.1 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length70 ft (21.3 m)
Longest span34 ft (10.4 m)
Deck width98 ft (30 m)
Roadway width64 ft (19.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,532 (2023)
Projected traffic11,459 by 2032
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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 1962, making it 63 years old in 2025. It was reconstructed in 2007.

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 September 2023.

How much traffic does SR 4003 over Mill Run carry?

About 9,532 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is SR 4003 over Mill Run?

The structure is 70 ft (21.3 m) long with a longest span of 34 ft (10.4 m) and a deck 98 ft wide.

Who owns SR 4003 over Mill Run?

It is owned by the State Highway Agency.