US Bridges

5th Avenue over Mill Run

Good

Blair County, Pennsylvania · 5th.AVE.@ 31st.STREET · Structure no. 000000000005973

Built
1934
91 years old, rebuilt 2023
Condition
Good
inspected September 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
35 ft
1 main span
Daily traffic
889
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

5th Avenue over Mill Run is a prestressed concrete box beam or girders - multiple carrying 5th Avenue over Mill Run in Blair County, Pennsylvania. It was built in 1934 and reconstructed in 2023, so it is 91 years old, older 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 889 vehicles a day, roughly 15% of them trucks, projected to reach 889 by 2043. The structure is 35 ft (10.7 m) long and 38 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Carries5th Avenue
CrossesMill Run
Location5th.AVE.@ 31st.STREET
RouteCity Street 0
Coordinates40.49442, -78.4108
Functional classUrban Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.7 US tons
Inventory rating42.9 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length35 ft (10.7 m)
Longest span32 ft (9.8 m)
Deck width38 ft (11.6 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic889 (2023)
Projected traffic889 by 2043
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 5th Avenue over Mill Run built?

It was built in 1934, making it 91 years old in 2025. It was reconstructed in 2023.

What condition is 5th Avenue 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 September 2023.

How much traffic does 5th Avenue over Mill Run carry?

About 889 vehicles per day (2023 count), of which roughly 15% are trucks.

How long is 5th Avenue over Mill Run?

The structure is 35 ft (10.7 m) long with a longest span of 32 ft (9.8 m) and a deck 38 ft wide.

Who owns 5th Avenue over Mill Run?

It is owned by the City or Municipal Highway Agency.