US Bridges

24 Mile Road over Salt River

Good

Macomb County, Michigan · 0.1 MI West of Baker Road · Structure no. 000000000006314

Built
1996
29 years old
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
130 ft
2 main spans
Daily traffic
4,270
2008 count
Owner
County
County Highway Agency

About this bridge

24 Mile Road over Salt River is a prestressed concrete stringer/multi-beam or girder carrying 24 Mile Road over Salt River in Macomb County, Michigan. It was built in 1996, so it is 29 years old, younger than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 4,270 vehicles a day, roughly 3% of them trucks, projected to reach 6,345 by 2028. The structure is 130 ft (39.6 m) long and 54 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries24 Mile Road
CrossesSalt River
Location0.1 MI West of Baker Road
RouteCounty Highway 0
CountyMacomb County
StateMichigan
Coordinates42.69037, -82.76738
Functional classUrban Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length130 ft (39.6 m)
Longest span63 ft (19.2 m)
Deck width54 ft (16.6 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,270 (2008)
Projected traffic6,345 by 2028
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 24 Mile Road over Salt River built?

It was built in 1996, making it 29 years old in 2025.

What condition is 24 Mile Road over Salt River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2024.

How much traffic does 24 Mile Road over Salt River carry?

About 4,270 vehicles per day (2008 count), of which roughly 3% are trucks.

How long is 24 Mile Road over Salt River?

The structure is 130 ft (39.6 m) long with a longest span of 63 ft (19.2 m) and a deck 54 ft wide.

Who owns 24 Mile Road over Salt River?

It is owned by the County Highway Agency.