US Bridges

Plymouth Road over Rouge River

Fair

Wayne County, Michigan · Rouge Park · Structure no. 000000000012443

Built
1959
66 years old, rebuilt 1983
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
119 ft
3 main spans
Daily traffic
12,696
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Plymouth Road over Rouge River is a prestressed concrete stringer/multi-beam or girder carrying Plymouth Road over Rouge River in Wayne County, Michigan. It was built in 1959 and reconstructed in 1983, so it is 66 years old, older than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 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 12,696 vehicles a day, roughly 3% of them trucks, projected to reach 22,930 by 2040. The structure is 119 ft (36.4 m) long and 110 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesPlymouth Road
CrossesRouge River
LocationRouge Park
RouteCity Street 0
CountyWayne County
StateMichigan
Coordinates42.37169, -83.25548
Functional classUrban Other Principal Arterial

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating28.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length119 ft (36.4 m)
Longest span40 ft (12.2 m)
Deck width110 ft (33.6 m)
Roadway width88 ft (26.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,696 (2020)
Projected traffic22,930 by 2040
Trucks3%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
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 Plymouth Road over Rouge River built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 1983.

What condition is Plymouth Road over Rouge River 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 November 2023.

How much traffic does Plymouth Road over Rouge River carry?

About 12,696 vehicles per day (2020 count), of which roughly 3% are trucks.

How long is Plymouth Road over Rouge River?

The structure is 119 ft (36.4 m) long with a longest span of 40 ft (12.2 m) and a deck 110 ft wide.

Who owns Plymouth Road over Rouge River?

It is owned by the City or Municipal Highway Agency.