US Bridges

CR 628 over N Br Thunder Bay River

Good

Montmorency County, Michigan · 0.27 MI S of Werner RD · Structure no. 000000000014615

Built
2022
3 years old
Condition
Good
inspected May 2023
Type
Culvert
Aluminum, Wrought Iron, or Cast Iron
Length
23 ft
1 main span
Daily traffic
41
2016 count
Owner
County
County Highway Agency

About this bridge

CR 628 over N Br Thunder Bay River is a aluminum, wrought iron, or cast iron culvert carrying CR 628 over N Br Thunder Bay River in Montmorency County, Michigan. It was built in 2022, so it is 3 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 41 vehicles a day, projected to reach 50 by 2036. The structure is 23 ft (6.9 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCR 628
CrossesN Br Thunder Bay River
Location0.27 MI S of Werner RD
RouteCounty Highway 0
CountyMontmorency County
StateMichigan
Coordinates45.148, -84.0684
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 protection8 Very GoodNo problems noted.
Culvert9 ExcellentNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating80 US tons
Inventory rating61.8 US tons

Structure

Structure typeCulvert
MaterialAluminum, Wrought Iron, or Cast Iron
DeckNot applicable
Main spans1
Design loadGreater than HL 93
Structure length23 ft (6.9 m)
Longest span23 ft (6.9 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic41 (2016)
Projected traffic50 by 2036
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was CR 628 over N Br Thunder Bay River built?

It was built in 2022, making it 3 years old in 2025.

What condition is CR 628 over N Br Thunder Bay 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 May 2023.

How much traffic does CR 628 over N Br Thunder Bay River carry?

About 41 vehicles per day (2016 count).

How long is CR 628 over N Br Thunder Bay River?

The structure is 23 ft (6.9 m) long with a longest span of 23 ft (6.9 m).

Who owns CR 628 over N Br Thunder Bay River?

It is owned by the County Highway Agency.