US Bridges

118th Ave over Gun River

Fair

Allegan County, Michigan · Approx 1/8MI W of 2nd ST · Structure no. 000000000000277

Built
1977
48 years old
Condition
Fair
inspected April 2023
Type
Culvert
Steel
Length
33 ft
2 main spans
Daily traffic
274
2002 count
Owner
County
County Highway Agency

About this bridge

118th Ave over Gun River is a steel culvert carrying 118th Ave over Gun River in Allegan County, Michigan. It was built in 1977, so it is 48 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 5 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 274 vehicles a day, roughly 7% of them trucks, projected to reach 548 by 2022. The structure is 33 ft (10 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
Carries118th Ave
CrossesGun River
LocationApprox 1/8MI W of 2nd ST
RouteCounty Highway 0
CountyAllegan County
StateMichigan
Coordinates42.55238, -85.56512
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.7 US tons
Inventory rating21.4 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadH 20
Structure length33 ft (10 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 traffic274 (2002)
Projected traffic548 by 2022
Trucks7%
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 118th Ave over Gun River built?

It was built in 1977, making it 48 years old in 2025.

What condition is 118th Ave over Gun 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 April 2023.

How much traffic does 118th Ave over Gun River carry?

About 274 vehicles per day (2002 count), of which roughly 7% are trucks.

How long is 118th Ave over Gun River?

The structure is 33 ft (10 m) long with a longest span of 15 ft (4.5 m).

Who owns 118th Ave over Gun River?

It is owned by the County Highway Agency.