US Bridges

Mid-County Exwy.Nb over Chemical ROAD/3368-D4

Fair

Montgomery County, Pennsylvania · Sw.Of Tpk.Exit 25 29H10 · Structure no. 000000000027487

Built
1990
35 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
154 ft
1 main span
Daily traffic
51,719
2024 count
Owner
State
State Highway Agency

About this bridge

Mid-County Exwy.Nb over Chemical ROAD/3368-D4 is a steel stringer/multi-beam or girder carrying Mid-County Exwy.Nb over Chemical ROAD/3368-D4 in Montgomery County, Pennsylvania. It was built in 1990, so it is 35 years old, younger 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 6 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 51,719 vehicles a day, roughly 10% of them trucks, projected to reach 60,178 by 2032. The structure is 154 ft (46.9 m) long and 71 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesMid-County Exwy.Nb
CrossesChemical ROAD/3368-D4
LocationSw.Of Tpk.Exit 25 29H10
RouteInterstate 476
CountyMontgomery County
StatePennsylvania
Coordinates40.10394, -75.28983
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating81 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length154 ft (46.9 m)
Longest span151 ft (46 m)
Deck width71 ft (21.5 m)
Roadway width68 ft (20.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic51,719 (2024)
Projected traffic60,178 by 2032
Trucks10%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Mid-County Exwy.Nb over Chemical ROAD/3368-D4 built?

It was built in 1990, making it 35 years old in 2025.

What condition is Mid-County Exwy.Nb over Chemical ROAD/3368-D4 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 September 2023.

How much traffic does Mid-County Exwy.Nb over Chemical ROAD/3368-D4 carry?

About 51,719 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Mid-County Exwy.Nb over Chemical ROAD/3368-D4?

The structure is 154 ft (46.9 m) long with a longest span of 151 ft (46 m) and a deck 71 ft wide.

Who owns Mid-County Exwy.Nb over Chemical ROAD/3368-D4?

It is owned by the State Highway Agency.