US Bridges

12 Mile Road over S Branch Charlotte

Good

Chippewa County, Michigan · 1 MI N of Donaldson · Structure no. 000000000001647

Built
2017
8 years old
Condition
Good
inspected June 2023
Type
Culvert
Concrete
Length
33 ft
1 main span
Daily traffic
10
1986 count
Owner
County
County Highway Agency

About this bridge

12 Mile Road over S Branch Charlotte is a concrete culvert carrying 12 Mile Road over S Branch Charlotte in Chippewa County, Michigan. It was built in 2017, so it is 8 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 10 vehicles a day, projected to reach 15 by 2019. The structure is 33 ft (10.1 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries12 Mile Road
CrossesS Branch Charlotte
Location1 MI N of Donaldson
RouteCounty Highway 0
CountyChippewa County
StateMichigan
Coordinates46.33113, -84.36845
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65.7 US tons
Inventory rating50.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadUnknown
Structure length33 ft (10.1 m)
Longest span30 ft (9.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (1986)
Projected traffic15 by 2019
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$90,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 12 Mile Road over S Branch Charlotte built?

It was built in 2017, making it 8 years old in 2025.

What condition is 12 Mile Road over S Branch Charlotte 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 June 2023.

How much traffic does 12 Mile Road over S Branch Charlotte carry?

About 10 vehicles per day (1986 count).

How long is 12 Mile Road over S Branch Charlotte?

The structure is 33 ft (10.1 m) long with a longest span of 30 ft (9.1 m).

Who owns 12 Mile Road over S Branch Charlotte?

It is owned by the County Highway Agency.