US Bridges

Pa 36 over Mill Run

Good

Blair County, Pennsylvania · City of Altoona · Structure no. 000000000053358

Built
2016
9 years old
Condition
Good
inspected November 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
64 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 prestressed concrete box beam or girders - multiple carrying Pa 36 over Mill Run in Blair County, Pennsylvania. It was built in 2016, so it is 9 years old, younger than the Pennsylvania average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 9,380 vehicles a day, roughly 3% of them trucks, projected to reach 11,716 by 2036. The structure is 64 ft (19.5 m) long and 85 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesPa 36
CrossesMill Run
LocationCity of Altoona
RouteState Highway 36
Coordinates40.48267, -78.40243
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.3 US tons
Inventory rating39.2 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length64 ft (19.5 m)
Longest span62 ft (18.9 m)
Deck width85 ft (25.8 m)
Roadway width71 ft (21.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,380 (2024)
Projected traffic11,716 by 2036
Trucks3%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedDeck rehabilitation with only incidental widening
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Pa 36 over Mill Run built?

It was built in 2016, making it 9 years old in 2025.

What condition is Pa 36 over Mill Run in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2023.

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 64 ft (19.5 m) long with a longest span of 62 ft (18.9 m) and a deck 85 ft wide.

Who owns Pa 36 over Mill Run?

It is owned by the State Highway Agency.