US Bridges

Allegheny Street over Beaverdam Br.Juniata Riv

Fair

Blair County, Pennsylvania · Hollidaysburg Borough · Structure no. 000000000005998

Built
1911
114 years old, rebuilt 2021
Condition
Fair
inspected November 2023
Type
Arch - Deck
Concrete
Length
75 ft
1 main span
Daily traffic
7,061
2023 count
Owner
County
County Highway Agency

About this bridge

Allegheny Street over Beaverdam Br.Juniata Riv is a concrete arch - deck carrying Allegheny Street over Beaverdam Br.Juniata Riv in Blair County, Pennsylvania. It was built in 1911 and reconstructed in 2021, so it is 114 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 7,061 vehicles a day, roughly 1% of them trucks, projected to reach 940 by 2043. The structure is 75 ft (22.9 m) long and 50 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesAllegheny Street
CrossesBeaverdam Br.Juniata Riv
LocationHollidaysburg Borough
RouteCity Street 0
CountyBlair County
StatePennsylvania
Coordinates40.42786, -78.39714
Functional classUrban Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54 US tons
Inventory rating36 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadH 10
Structure length75 ft (22.9 m)
Longest span75 ft (22.9 m)
Deck width50 ft (15.2 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,061 (2023)
Projected traffic940 by 2043
Trucks1%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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$1 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Allegheny Street over Beaverdam Br.Juniata Riv built?

It was built in 1911, making it 114 years old in 2025. It was reconstructed in 2021.

What condition is Allegheny Street over Beaverdam Br.Juniata Riv 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 November 2023.

How much traffic does Allegheny Street over Beaverdam Br.Juniata Riv carry?

About 7,061 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Allegheny Street over Beaverdam Br.Juniata Riv?

The structure is 75 ft (22.9 m) long with a longest span of 75 ft (22.9 m) and a deck 50 ft wide.

Who owns Allegheny Street over Beaverdam Br.Juniata Riv?

It is owned by the County Highway Agency.