US Bridges

Pa Tpk (I-476) over Sawmill Run

Fair

Carbon County, Pennsylvania · 0.5 MI W Beltzville Lake · Structure no. 000000000009154

Built
1956
69 years old
Condition
Fair
inspected July 2023
Type
Culvert
Concrete
Length
25 ft
1 main span
Daily traffic
24,228
2004 count
Owner
Toll Authority
State Toll Authority

About this bridge

Pa Tpk (I-476) over Sawmill Run is a concrete culvert carrying Pa Tpk (I-476) over Sawmill Run in Carbon County, Pennsylvania. It was built in 1956, so it is 69 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 24,228 vehicles a day, roughly 20% of them trucks, projected to reach 32,159 by 2030. The structure is 25 ft (7.6 m) long. If it were closed, the detour would be 11.8 mi (19 km).

Location

Open in Google Maps
CarriesPa Tpk (I-476)
CrossesSawmill Run
Location0.5 MI W Beltzville Lake
RouteInterstate 476
CountyCarbon County
StatePennsylvania
Coordinates40.8572, -75.65077
Functional classUrban 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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
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 spans1
Design loadHS 20
Structure length25 ft (7.6 m)
Longest span20 ft (6.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic24,228 (2004)
Projected traffic32,159 by 2030
Trucks20%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$273,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Pa Tpk (I-476) over Sawmill Run built?

It was built in 1956, making it 69 years old in 2025.

What condition is Pa Tpk (I-476) over Sawmill Run 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 July 2023.

How much traffic does Pa Tpk (I-476) over Sawmill Run carry?

About 24,228 vehicles per day (2004 count), of which roughly 20% are trucks.

How long is Pa Tpk (I-476) over Sawmill Run?

The structure is 25 ft (7.6 m) long with a longest span of 20 ft (6.1 m).

Who owns Pa Tpk (I-476) over Sawmill Run?

It is owned by the State Toll Authority.