US Bridges

8 Mile Road over Clam River

Fair

Missaukee County, Michigan · Section 20/21 T21N R6W · Structure no. 000000000007036

Built
1962
63 years old
Condition
Fair
inspected May 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
70 ft
2 main spans
Daily traffic
531
2018 count
Owner
County
County Highway Agency

About this bridge

8 Mile Road over Clam River is a prestressed concrete box beam or girders - multiple carrying 8 Mile Road over Clam River in Missaukee County, Michigan. It was built in 1962, so it is 63 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 531 vehicles a day, roughly 10% of them trucks, projected to reach 870 by 2038. The structure is 70 ft (21.3 m) long and 27 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
Carries8 Mile Road
CrossesClam River
LocationSection 20/21 T21N R6W
RouteCounty Highway 5753
CountyMissaukee County
StateMichigan
Coordinates44.20058, -85.05297
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.7 US tons
Inventory rating36.4 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans2
Design loadHS 20 + Mod
Structure length70 ft (21.3 m)
Longest span35 ft (10.6 m)
Deck width27 ft (8.2 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic531 (2018)
Projected traffic870 by 2038
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 8 Mile Road over Clam River built?

It was built in 1962, making it 63 years old in 2025.

What condition is 8 Mile Road over Clam 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 May 2023.

How much traffic does 8 Mile Road over Clam River carry?

About 531 vehicles per day (2018 count), of which roughly 10% are trucks.

How long is 8 Mile Road over Clam River?

The structure is 70 ft (21.3 m) long with a longest span of 35 ft (10.6 m) and a deck 27 ft wide.

Who owns 8 Mile Road over Clam River?

It is owned by the County Highway Agency.