US Bridges

Mid-County Exwy.Sb over Chemical Road / 3368-C5

Fair

Montgomery County, Pennsylvania · Plymouth Township 29G11 · Structure no. 000000000027484

Built
1974
51 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
202 ft
1 main span
Daily traffic
48,794
2024 count
Owner
State
State Highway Agency

About this bridge

Mid-County Exwy.Sb over Chemical Road / 3368-C5 is a steel stringer/multi-beam or girder carrying Mid-County Exwy.Sb over Chemical Road / 3368-C5 in Montgomery County, Pennsylvania. It was built in 1974, so it is 51 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 48,794 vehicles a day, roughly 9% of them trucks, projected to reach 67,333 by 2032. The structure is 202 ft (61.6 m) long and 68 ft wide.

Location

Open in Google Maps
CarriesMid-County Exwy.Sb
CrossesChemical Road / 3368-C5
LocationPlymouth Township 29G11
RouteInterstate 476
CountyMontgomery County
StatePennsylvania
Coordinates40.09952, -75.29465
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68 US tons
Inventory rating40 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadHS 20 + Mod
Structure length202 ft (61.6 m)
Longest span117 ft (35.7 m)
Deck width68 ft (20.7 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic48,794 (2024)
Projected traffic67,333 by 2032
Trucks9%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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.Sb over Chemical Road / 3368-C5 built?

It was built in 1974, making it 51 years old in 2025.

What condition is Mid-County Exwy.Sb over Chemical Road / 3368-C5 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.Sb over Chemical Road / 3368-C5 carry?

About 48,794 vehicles per day (2024 count), of which roughly 9% are trucks.

How long is Mid-County Exwy.Sb over Chemical Road / 3368-C5?

The structure is 202 ft (61.6 m) long with a longest span of 117 ft (35.7 m) and a deck 68 ft wide.

Who owns Mid-County Exwy.Sb over Chemical Road / 3368-C5?

It is owned by the State Highway Agency.