US Bridges

Mid-County Exwy.Nb over Brook Road

Fair

Montgomery County, Pennsylvania · Plymouth Township 3368A07 · Structure no. 000000000027479

Built
1974
51 years old
Condition
Fair
inspected September 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
136 ft
3 main spans
Daily traffic
57,500
2024 count
Owner
State
State Highway Agency

About this bridge

Mid-County Exwy.Nb over Brook Road is a prestressed concrete box beam or girders - multiple carrying Mid-County Exwy.Nb over Brook Road 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 57,500 vehicles a day, roughly 9% of them trucks, projected to reach 92,978 by 2032. The structure is 136 ft (41.5 m) long and 56 ft wide.

Location

Open in Google Maps
CarriesMid-County Exwy.Nb
CrossesBrook Road
LocationPlymouth Township 3368A07
RouteInterstate 476
CountyMontgomery County
StatePennsylvania
Coordinates40.08614, -75.30969
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 rating32 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length136 ft (41.5 m)
Longest span65 ft (19.8 m)
Deck width56 ft (17.1 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic57,500 (2024)
Projected traffic92,978 by 2032
Trucks9%
Lanes on structure3
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.Nb over Brook Road built?

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

What condition is Mid-County Exwy.Nb over Brook Road 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 Brook Road carry?

About 57,500 vehicles per day (2024 count), of which roughly 9% are trucks.

How long is Mid-County Exwy.Nb over Brook Road?

The structure is 136 ft (41.5 m) long with a longest span of 65 ft (19.8 m) and a deck 56 ft wide.

Who owns Mid-County Exwy.Nb over Brook Road?

It is owned by the State Highway Agency.