US Bridges

Pa Tpk (I-276) over Nsrc & Diamond Run

Good

Montgomery County, Pennsylvania · Near Norristown · Structure no. 000000000040869

Built
2000
25 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
154 ft
2 main spans
Daily traffic
65,138
2004 count
Owner
Toll Authority
State Toll Authority

About this bridge

Pa Tpk (I-276) over Nsrc & Diamond Run is a steel continuous stringer/multi-beam or girder carrying Pa Tpk (I-276) over Nsrc & Diamond Run in Montgomery County, Pennsylvania. It was built in 2000, so it is 25 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 65,138 vehicles a day, roughly 12% of them trucks, projected to reach 98,418 by 2030. The structure is 154 ft (46.9 m) long and 104 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesPa Tpk (I-276)
CrossesNsrc & Diamond Run
LocationNear Norristown
RouteInterstate 276
CountyMontgomery County
StatePennsylvania
Coordinates40.10458, -75.32112
Functional classUrban 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.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating91.1 US tons
Inventory rating54 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length154 ft (46.9 m)
Longest span78 ft (23.8 m)
Deck width104 ft (31.6 m)
Roadway width96 ft (29.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic65,138 (2004)
Projected traffic98,418 by 2030
Trucks12%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad and waterway
Detour if closed1.2 mi (2 km)
TollToll bridge
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Pa Tpk (I-276) over Nsrc & Diamond Run built?

It was built in 2000, making it 25 years old in 2025.

What condition is Pa Tpk (I-276) over Nsrc & Diamond Run 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 July 2024.

How much traffic does Pa Tpk (I-276) over Nsrc & Diamond Run carry?

About 65,138 vehicles per day (2004 count), of which roughly 12% are trucks.

How long is Pa Tpk (I-276) over Nsrc & Diamond Run?

The structure is 154 ft (46.9 m) long with a longest span of 78 ft (23.8 m) and a deck 104 ft wide.

Who owns Pa Tpk (I-276) over Nsrc & Diamond Run?

It is owned by the State Toll Authority.