US Bridges

Pa 36 over Mill Run

Fair

Blair County, Pennsylvania · Altoona · Structure no. 000000000005563

Built
1914
111 years old, rebuilt 1927
Condition
Fair
inspected September 2024
Type
Tee Beam
Concrete
Length
29 ft
1 main span
Daily traffic
9,380
2024 count
Owner
State
State Highway Agency

About this bridge

Pa 36 over Mill Run is a concrete tee beam carrying Pa 36 over Mill Run in Blair County, Pennsylvania. It was built in 1914 and reconstructed in 1927, so it is 111 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 9,380 vehicles a day, roughly 3% of them trucks, projected to reach 11,113 by 2032. The structure is 29 ft (8.8 m) long and 52 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesPa 36
CrossesMill Run
LocationAltoona
RouteState Highway 36
CountyBlair County
StatePennsylvania
Coordinates40.49244, -78.40651
Functional classUrban Minor 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
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating83 US tons
Inventory rating49.1 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length29 ft (8.8 m)
Longest span28 ft (8.5 m)
Deck width52 ft (15.8 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,380 (2024)
Projected traffic11,113 by 2032
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$651,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Pa 36 over Mill Run built?

It was built in 1914, making it 111 years old in 2025. It was reconstructed in 1927.

What condition is Pa 36 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 2024.

How much traffic does Pa 36 over Mill Run carry?

About 9,380 vehicles per day (2024 count), of which roughly 3% are trucks.

How long is Pa 36 over Mill Run?

The structure is 29 ft (8.8 m) long with a longest span of 28 ft (8.5 m) and a deck 52 ft wide.

Who owns Pa 36 over Mill Run?

It is owned by the State Highway Agency.