US Bridges

Mackinac Trail over Chub Creek

Poor

Chippewa County, Michigan · 5 MI S of Rudyard · Structure no. 000000000001637

Built
1933
92 years old
Condition
Poor
inspected June 2024
Type
Culvert
Concrete
Length
30 ft
2 main spans
Daily traffic
216
1986 count
Owner
County
County Highway Agency

About this bridge

Mackinac Trail over Chub Creek is a concrete culvert carrying Mackinac Trail over Chub Creek in Chippewa County, Michigan. It was built in 1933, so it is 92 years old, older than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 216 vehicles a day, projected to reach 375 by 2019. The structure is 30 ft (9.1 m) long. If it were closed, the detour would be 11.8 mi (19 km).

Location

Open in Google Maps
CarriesMackinac Trail
CrossesChub Creek
Location5 MI S of Rudyard
RouteCounty Highway 1731
CountyChippewa County
StateMichigan
Coordinates46.16281, -84.61122
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Culvert3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Last inspectionJune 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.6 US tons
Inventory rating21.3 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadH 15
Structure length30 ft (9.1 m)
Longest span15 ft (4.5 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic216 (1986)
Projected traffic375 by 2019
Trucks0%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$160,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Mackinac Trail over Chub Creek built?

It was built in 1933, making it 92 years old in 2025.

What condition is Mackinac Trail over Chub Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in June 2024.

How much traffic does Mackinac Trail over Chub Creek carry?

About 216 vehicles per day (1986 count).

How long is Mackinac Trail over Chub Creek?

The structure is 30 ft (9.1 m) long with a longest span of 15 ft (4.5 m).

Who owns Mackinac Trail over Chub Creek?

It is owned by the County Highway Agency.