US Bridges

18th Street over Rabbit River

FairPosted for load

Allegan County, Michigan · Approx 1/4 MI N of 130th · Structure no. 000000000000205

Built
1929
96 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
46 ft
1 main span
Daily traffic
2,216
2019 count
Owner
County
County Highway Agency

About this bridge

18th Street over Rabbit River is a steel stringer/multi-beam or girder carrying 18th Street over Rabbit River in Allegan County, Michigan. It was built in 1929, so it is 96 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 2,216 vehicles a day, roughly 4% of them trucks, projected to reach 2,700 by 2039. The structure is 46 ft (14 m) long and 29 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

Open in Google Maps
Carries18th Street
CrossesRabbit River
LocationApprox 1/4 MI N of 130th
RouteCounty Highway 371
CountyAllegan County
StateMichigan
Coordinates42.64238, -85.72175
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating25.4 US tons
Inventory rating15.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length46 ft (14 m)
Longest span44 ft (13.4 m)
Deck width29 ft (8.7 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,216 (2019)
Projected traffic2,700 by 2039
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 18th Street over Rabbit River built?

It was built in 1929, making it 96 years old in 2025.

What condition is 18th Street over Rabbit 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 18th Street over Rabbit River carry?

About 2,216 vehicles per day (2019 count), of which roughly 4% are trucks.

How long is 18th Street over Rabbit River?

The structure is 46 ft (14 m) long with a longest span of 44 ft (13.4 m) and a deck 29 ft wide.

Who owns 18th Street over Rabbit River?

It is owned by the County Highway Agency.