US Bridges

Holy Island Road over So Arm Lake Charlevoix

Good

Charlevoix County, Michigan · 6 MI So of Charlevoix · Structure no. 000000000001483

Built
2008
17 years old
Condition
Good
inspected October 2024
Type
Truss - Thru
Steel
Length
120 ft
1 main span
Daily traffic
30
2008 count
Owner
County
County Highway Agency

About this bridge

Holy Island Road over So Arm Lake Charlevoix is a steel truss - thru carrying Holy Island Road over So Arm Lake Charlevoix in Charlevoix County, Michigan. It was built in 2008, so it is 17 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 30 vehicles a day, projected to reach 30 by 2028. The structure is 120 ft (36.6 m) long and 18 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesHoly Island Road
CrossesSo Arm Lake Charlevoix
Location6 MI So of Charlevoix
RouteCounty Highway 0
CountyCharlevoix County
StateMichigan
Coordinates45.2332, -85.16909
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.5 US tons
Inventory rating44.6 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1
Design loadHL 93
Structure length120 ft (36.6 m)
Longest span116 ft (35.4 m)
Deck width18 ft (5.4 m)
Roadway width15 ft (4.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2008)
Projected traffic30 by 2028
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusListed on the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Holy Island Road over So Arm Lake Charlevoix built?

It was built in 2008, making it 17 years old in 2025.

What condition is Holy Island Road over So Arm Lake Charlevoix 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 Holy Island Road over So Arm Lake Charlevoix carry?

About 30 vehicles per day (2008 count).

How long is Holy Island Road over So Arm Lake Charlevoix?

The structure is 120 ft (36.6 m) long with a longest span of 116 ft (35.4 m) and a deck 18 ft wide.

Who owns Holy Island Road over So Arm Lake Charlevoix?

It is owned by the County Highway Agency.