US Bridges

18 Mile RD over Plumbrook Drain

Fair

Macomb County, Michigan · 0.3 MI East of Mound RD · Structure no. 000000000006204

Built
1965
60 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
49 ft
1 main span
Daily traffic
17,350
2007 count
Owner
County
County Highway Agency

About this bridge

18 Mile RD over Plumbrook Drain is a steel stringer/multi-beam or girder carrying 18 Mile RD over Plumbrook Drain in Macomb County, Michigan. It was built in 1965, so it is 60 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 17,350 vehicles a day, roughly 7% of them trucks, projected to reach 23,370 by 2027. The structure is 49 ft (14.9 m) long and 61 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries18 Mile RD
CrossesPlumbrook Drain
Location0.3 MI East of Mound RD
RouteCounty Highway 2058
CountyMacomb County
StateMichigan
Coordinates42.59453, -83.04375
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating103.2 US tons
Inventory rating61.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length49 ft (14.9 m)
Longest span47 ft (14.3 m)
Deck width61 ft (18.7 m)
Roadway width52 ft (16 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,350 (2007)
Projected traffic23,370 by 2027
Trucks7%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$70,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 18 Mile RD over Plumbrook Drain built?

It was built in 1965, making it 60 years old in 2025.

What condition is 18 Mile RD over Plumbrook Drain 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 18 Mile RD over Plumbrook Drain carry?

About 17,350 vehicles per day (2007 count), of which roughly 7% are trucks.

How long is 18 Mile RD over Plumbrook Drain?

The structure is 49 ft (14.9 m) long with a longest span of 47 ft (14.3 m) and a deck 61 ft wide.

Who owns 18 Mile RD over Plumbrook Drain?

It is owned by the County Highway Agency.