US Bridges

Litchfield Road over Cobb Lake Outlet

Fair

Hillsdale County, Michigan · 0.9 Mile E of Concord RD · Structure no. 000000000003305

Built
1955
70 years old
Condition
Fair
inspected November 2024
Type
Culvert
Steel
Length
22 ft
3 main spans
Daily traffic
1,089
2013 count
Owner
County
County Highway Agency

About this bridge

Litchfield Road over Cobb Lake Outlet is a steel culvert carrying Litchfield Road over Cobb Lake Outlet in Hillsdale County, Michigan. It was built in 1955, so it is 70 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 1,089 vehicles a day, projected to reach 1,787 by 2038. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesLitchfield Road
CrossesCobb Lake Outlet
Location0.9 Mile E of Concord RD
RouteCounty Highway 3094
CountyHillsdale County
StateMichigan
Coordinates42.04382, -84.63456
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating49.3 US tons
Inventory rating29.7 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadHS 20
Structure length22 ft (6.7 m)
Longest span6 ft (1.8 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,089 (2013)
Projected traffic1,787 by 2038
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Litchfield Road over Cobb Lake Outlet built?

It was built in 1955, making it 70 years old in 2025.

What condition is Litchfield Road over Cobb Lake Outlet 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 November 2024.

How much traffic does Litchfield Road over Cobb Lake Outlet carry?

About 1,089 vehicles per day (2013 count).

How long is Litchfield Road over Cobb Lake Outlet?

The structure is 22 ft (6.7 m) long with a longest span of 6 ft (1.8 m).

Who owns Litchfield Road over Cobb Lake Outlet?

It is owned by the County Highway Agency.