US Bridges

Pa Tpk (I-76) over Mtown & Htown RR

Good

Dauphin County, Pennsylvania · Lower Swatara Twp. · Structure no. 000000000054296

Built
2016
9 years old
Condition
Good
inspected February 2023
Type
Box Beam or Girders - Multiple
Concrete
Length
47 ft
1 main span
Daily traffic
24,423
2001 count
Owner
Toll Authority
State Toll Authority

About this bridge

Pa Tpk (I-76) over Mtown & Htown RR is a concrete box beam or girders - multiple carrying Pa Tpk (I-76) over Mtown & Htown RR in Dauphin County, Pennsylvania. It was built in 2016, so it is 9 years old, younger 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 24,423 vehicles a day, roughly 24% of them trucks, projected to reach 31,579 by 2030. The structure is 47 ft (14.3 m) long and 126 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesPa Tpk (I-76)
CrossesMtown & Htown RR
LocationLower Swatara Twp.
RouteInterstate 76
CountyDauphin County
StatePennsylvania
Coordinates40.20989, -76.71903
Functional classRural Principal Arterial - Interstate

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionFebruary 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69.7 US tons
Inventory rating43.5 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length47 ft (14.3 m)
Longest span45 ft (13.7 m)
Deck width126 ft (38.5 m)
Roadway width118 ft (36 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic24,423 (2001)
Projected traffic31,579 by 2030
Trucks24%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed8.1 mi (13 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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Pa Tpk (I-76) over Mtown & Htown RR built?

It was built in 2016, making it 9 years old in 2025.

What condition is Pa Tpk (I-76) over Mtown & Htown RR 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 February 2023.

How much traffic does Pa Tpk (I-76) over Mtown & Htown RR carry?

About 24,423 vehicles per day (2001 count), of which roughly 24% are trucks.

How long is Pa Tpk (I-76) over Mtown & Htown RR?

The structure is 47 ft (14.3 m) long with a longest span of 45 ft (13.7 m) and a deck 126 ft wide.

Who owns Pa Tpk (I-76) over Mtown & Htown RR?

It is owned by the State Toll Authority.