US Bridges

SR 79 NB over Over Lt Shenango R & RR

Fair

Mercer County, Pennsylvania · Lake Township · Structure no. 000000000025754

Built
1969
56 years old, rebuilt 1989
Condition
Fair
inspected June 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
490 ft
8 main spans
Daily traffic
9,835
2024 count
Owner
State
State Highway Agency

About this bridge

SR 79 NB over Over Lt Shenango R & RR is a prestressed concrete box beam or girders - multiple carrying SR 79 NB over Over Lt Shenango R & RR in Mercer County, Pennsylvania. It was built in 1969 and reconstructed in 1989, so it is 56 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 9,835 vehicles a day, roughly 22% of them trucks, projected to reach 9,924 by 2032. The structure is 490 ft (149.4 m) long and 37 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesSR 79 NB
CrossesOver Lt Shenango R & RR
LocationLake Township
RouteInterstate 79
Coordinates41.36891, -80.15701
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67 US tons
Inventory rating40 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans8
Design loadHS 20 + Mod
Structure length490 ft (149.4 m)
Longest span64 ft (19.5 m)
Deck width37 ft (11.4 m)
Roadway width35 ft (10.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,835 (2024)
Projected traffic9,924 by 2032
Trucks22%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad and waterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$770,000
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 79 NB over Over Lt Shenango R & RR built?

It was built in 1969, making it 56 years old in 2025. It was reconstructed in 1989.

What condition is SR 79 NB over Over Lt Shenango R & RR 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 June 2024.

How much traffic does SR 79 NB over Over Lt Shenango R & RR carry?

About 9,835 vehicles per day (2024 count), of which roughly 22% are trucks.

How long is SR 79 NB over Over Lt Shenango R & RR?

The structure is 490 ft (149.4 m) long with a longest span of 64 ft (19.5 m) and a deck 37 ft wide.

Who owns SR 79 NB over Over Lt Shenango R & RR?

It is owned by the State Highway Agency.