US Bridges

County RD 456 over Chocolay River

Good

Marquette County, Michigan · 2 Miles West of Carlshend · Structure no. 000000000006532

Built
2024
1 years old
Condition
Good
inspected October 2024
Type
Culvert
Concrete
Length
35 ft
1 main span
Daily traffic
245
2022 count
Owner
County
County Highway Agency

About this bridge

County RD 456 over Chocolay River is a concrete culvert carrying County RD 456 over Chocolay River in Marquette County, Michigan. It was built in 2024, so it is 1 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 245 vehicles a day, roughly 9% of them trucks, projected to reach 300 by 2042. The structure is 35 ft (10.7 m) long. If it were closed, the detour would be 11.8 mi (19 km).

Location

Open in Google Maps
CarriesCounty RD 456
CrossesChocolay River
Location2 Miles West of Carlshend
RouteCounty Highway 5240
CountyMarquette County
StateMichigan
Coordinates46.31311, -87.25866
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
Channel and channel protection9 ExcellentNo problems noted.
Culvert9 ExcellentNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81 US tons
Inventory rating62.5 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadGreater than HL 93
Structure length35 ft (10.7 m)
Longest span32 ft (9.8 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic245 (2022)
Projected traffic300 by 2042
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 County RD 456 over Chocolay River built?

It was built in 2024, making it 1 years old in 2025.

What condition is County RD 456 over Chocolay 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 October 2024.

How much traffic does County RD 456 over Chocolay River carry?

About 245 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is County RD 456 over Chocolay River?

The structure is 35 ft (10.7 m) long with a longest span of 32 ft (9.8 m).

Who owns County RD 456 over Chocolay River?

It is owned by the County Highway Agency.