US Bridges

Wilson Road over Grill & Cone Drain

Fair

Gratiot County, Michigan · Sec 29-32 North Shade Twp · Structure no. 000000000003133

Built
1978
47 years old
Condition
Fair
inspected June 2023
Type
Culvert
Steel
Length
24 ft
1 main span
Daily traffic
170
2003 count
Owner
County
County Highway Agency

About this bridge

Wilson Road over Grill & Cone Drain is a steel culvert carrying Wilson Road over Grill & Cone Drain in Gratiot County, Michigan. It was built in 1978, so it is 47 years old, younger 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 170 vehicles a day, projected to reach 232 by 2023. The structure is 24 ft (7.3 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesWilson Road
CrossesGrill & Cone Drain
LocationSec 29-32 North Shade Twp
RouteCounty Highway 2904
CountyGratiot County
StateMichigan
Coordinates43.13321, -84.81546
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 inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating89 US tons
Inventory rating70 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadHS 20 + Mod
Structure length24 ft (7.3 m)
Longest span24 ft (7.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic170 (2003)
Projected traffic232 by 2023
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 Wilson Road over Grill & Cone Drain built?

It was built in 1978, making it 47 years old in 2025.

What condition is Wilson Road over Grill & Cone Drain 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 June 2023.

How much traffic does Wilson Road over Grill & Cone Drain carry?

About 170 vehicles per day (2003 count).

How long is Wilson Road over Grill & Cone Drain?

The structure is 24 ft (7.3 m) long with a longest span of 24 ft (7.3 m).

Who owns Wilson Road over Grill & Cone Drain?

It is owned by the County Highway Agency.