US Bridges

M-21 over Lost Creek

Good

Clinton County, Michigan · 3.5 MI W of Fowler · Structure no. 000000000001881

Built
2005
20 years old
Condition
Good
inspected October 2024
Type
Culvert
Concrete
Length
20 ft
1 main span
Daily traffic
2,731
2007 count
Owner
State
State Highway Agency

About this bridge

M-21 over Lost Creek is a concrete culvert carrying M-21 over Lost Creek in Clinton County, Michigan. It was built in 2005, so it is 20 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 2,731 vehicles a day, roughly 11% of them trucks, projected to reach 3,957 by 2018. The structure is 20 ft (6.1 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesM-21
CrossesLost Creek
Location3.5 MI W of Fowler
RouteState Highway 21
CountyClinton County
StateMichigan
Coordinates43.00198, -84.81037
Functional classRural Minor Arterial

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74 US tons
Inventory rating44.3 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length20 ft (6.1 m)
Longest span20 ft (6.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,731 (2007)
Projected traffic3,957 by 2018
Trucks11%
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

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedDeck replacement with only incidental widening
Estimated improvement cost$9,000
NavigationNo navigation control on waterway

Frequently asked questions

When was M-21 over Lost Creek built?

It was built in 2005, making it 20 years old in 2025.

What condition is M-21 over Lost Creek 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 M-21 over Lost Creek carry?

About 2,731 vehicles per day (2007 count), of which roughly 11% are trucks.

How long is M-21 over Lost Creek?

The structure is 20 ft (6.1 m) long with a longest span of 20 ft (6.1 m).

Who owns M-21 over Lost Creek?

It is owned by the State Highway Agency.