US Bridges

Cohoctah Road over Cranberry Creek

Good

Livingston County, Michigan · Sec 4 Deerfield Twp · Structure no. 000000000005826

Built
1955
70 years old
Condition
Good
inspected October 2023
Type
Slab
Concrete
Length
22 ft
1 main span
Daily traffic
420
2015 count
Owner
County
County Highway Agency

About this bridge

Cohoctah Road over Cranberry Creek is a concrete slab carrying Cohoctah Road over Cranberry Creek in Livingston County, Michigan. It was built in 1955, so it is 70 years old, older 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 420 vehicles a day, projected to reach 450 by 2045. The structure is 22 ft (6.7 m) long and 35 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCohoctah Road
CrossesCranberry Creek
LocationSec 4 Deerfield Twp
RouteCounty Highway 4790
CountyLivingston County
StateMichigan
Coordinates42.76358, -83.86901
Functional classRural Major Collector

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50 US tons
Inventory rating30 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length22 ft (6.7 m)
Longest span20 ft (6.1 m)
Deck width35 ft (10.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic420 (2015)
Projected traffic450 by 2045
Trucks—
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Cohoctah Road over Cranberry Creek built?

It was built in 1955, making it 70 years old in 2025.

What condition is Cohoctah Road over Cranberry Creek 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 October 2023.

How much traffic does Cohoctah Road over Cranberry Creek carry?

About 420 vehicles per day (2015 count).

How long is Cohoctah Road over Cranberry Creek?

The structure is 22 ft (6.7 m) long with a longest span of 20 ft (6.1 m) and a deck 35 ft wide.

Who owns Cohoctah Road over Cranberry Creek?

It is owned by the County Highway Agency.