US Bridges

Ko Road over Little Garlic River

Fair

Marquette County, Michigan · 0.5 MI N of Buckroe · Structure no. 000000000006599

Built
1936
89 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
43 ft
1 main span
Daily traffic
20
2001 count
Owner
County
County Highway Agency

About this bridge

Ko Road over Little Garlic River is a steel stringer/multi-beam or girder carrying Ko Road over Little Garlic River in Marquette County, Michigan. It was built in 1936, so it is 89 years old, older than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 20 vehicles a day, projected to reach 20 by 2020. The structure is 43 ft (13.1 m) long and 16 ft wide. If it were closed, the detour would be 124.3 mi (200 km).

Location

Open in Google Maps
CarriesKo Road
CrossesLittle Garlic River
Location0.5 MI N of Buckroe
RouteCounty Highway 0
CountyMarquette County
StateMichigan
Coordinates46.67946, -87.52619
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating28.5 US tons
Inventory rating22.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans1
Design loadHS 20 + Mod
Structure length43 ft (13.1 m)
Longest span38 ft (11.5 m)
Deck width16 ft (4.9 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2001)
Projected traffic20 by 2020
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed124.3 mi (200 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$72,000 (2050 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Ko Road over Little Garlic River built?

It was built in 1936, making it 89 years old in 2025.

What condition is Ko Road over Little Garlic River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in October 2023.

How much traffic does Ko Road over Little Garlic River carry?

About 20 vehicles per day (2001 count).

How long is Ko Road over Little Garlic River?

The structure is 43 ft (13.1 m) long with a longest span of 38 ft (11.5 m) and a deck 16 ft wide.

Who owns Ko Road over Little Garlic River?

It is owned by the County Highway Agency.