US Bridges

Pa Tpk (I-76) over Glades Creek

Fair

Somerset County, Pennsylvania · East of Brotherton · Structure no. 000000000031818

Built
1939
86 years old, rebuilt 2004
Condition
Fair
inspected April 2023
Type
Culvert
Concrete
Length
34 ft
2 main spans
Daily traffic
29,452
1999 count
Owner
Toll Authority
State Toll Authority

About this bridge

Pa Tpk (I-76) over Glades Creek is a concrete culvert carrying Pa Tpk (I-76) over Glades Creek in Somerset County, Pennsylvania. It was built in 1939 and reconstructed in 2004, so it is 86 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 29,452 vehicles a day, roughly 36% of them trucks, projected to reach 34,324 by 2030. The structure is 34 ft (10.4 m) long. If it were closed, the detour would be 9.9 mi (16 km).

Location

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CarriesPa Tpk (I-76)
CrossesGlades Creek
LocationEast of Brotherton
RouteInterstate 76
CountySomerset County
StatePennsylvania
Coordinates39.97594, -78.92143
Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: 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 rating99 US tons
Inventory rating98.9 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length34 ft (10.4 m)
Longest span34 ft (10.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic29,452 (1999)
Projected traffic34,324 by 2030
Trucks36%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a toll road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Toll Authority
Maintained byState Toll Authority
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$420,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Pa Tpk (I-76) over Glades Creek built?

It was built in 1939, making it 86 years old in 2025. It was reconstructed in 2004.

What condition is Pa Tpk (I-76) over Glades Creek 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 April 2023.

How much traffic does Pa Tpk (I-76) over Glades Creek carry?

About 29,452 vehicles per day (1999 count), of which roughly 36% are trucks.

How long is Pa Tpk (I-76) over Glades Creek?

The structure is 34 ft (10.4 m) long with a longest span of 34 ft (10.4 m).

Who owns Pa Tpk (I-76) over Glades Creek?

It is owned by the State Toll Authority.