US Bridges

107th Ave over Swan Creek

PoorPosted for load

Allegan County, Michigan · Just W of 46th ST · Structure no. 000000000000224

Built
1974
51 years old
Condition
Poor
inspected April 2024
Type
Slab
Wood or Timber
Length
32 ft
1 main span
Daily traffic
55
2020 count
Owner
County
County Highway Agency

About this bridge

107th Ave over Swan Creek is a wood or timber slab carrying 107th Ave over Swan Creek in Allegan County, Michigan. It was built in 1974, so it is 51 years old, older than the Michigan average of 48.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 55 vehicles a day, roughly 7% of them trucks, projected to reach 82 by 2040. The structure is 32 ft (9.8 m) long and 30 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries107th Ave
CrossesSwan Creek
LocationJust W of 46th ST
RouteCounty Highway 0
CountyAllegan County
StateMichigan
Coordinates42.46951, -85.99392
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating28.2 US tons
Inventory rating18.5 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 20 + Mod
Structure length32 ft (9.8 m)
Longest span32 ft (9.7 m)
Deck width30 ft (9 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic55 (2020)
Projected traffic82 by 2040
Trucks7%
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

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 107th Ave over Swan Creek built?

It was built in 1974, making it 51 years old in 2025.

What condition is 107th Ave over Swan Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2024.

How much traffic does 107th Ave over Swan Creek carry?

About 55 vehicles per day (2020 count), of which roughly 7% are trucks.

How long is 107th Ave over Swan Creek?

The structure is 32 ft (9.8 m) long with a longest span of 32 ft (9.7 m) and a deck 30 ft wide.

Who owns 107th Ave over Swan Creek?

It is owned by the County Highway Agency.