US Bridges

Colf Road over Swan Creek

Fair

Monroe County, Michigan · 1 MI W of Carleton West · Structure no. 000000000007355

Built
1995
30 years old
Condition
Fair
inspected June 2024
Type
Culvert
Concrete
Length
25 ft
1 main span
Daily traffic
240
2016 count
Owner
County
County Highway Agency

About this bridge

Colf Road over Swan Creek is a concrete culvert carrying Colf Road over Swan Creek in Monroe County, Michigan. It was built in 1995, so it is 30 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 240 vehicles a day, roughly 12% of them trucks, projected to reach 276 by 2036. The structure is 25 ft (7.6 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesColf Road
CrossesSwan Creek
Location1 MI W of Carleton West
RouteCounty Highway 0
CountyMonroe County
StateMichigan
Coordinates42.0731, -83.44966
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.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating79.7 US tons
Inventory rating47.5 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length25 ft (7.6 m)
Longest span22 ft (6.8 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic240 (2016)
Projected traffic276 by 2036
Trucks12%
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 Colf Road over Swan Creek built?

It was built in 1995, making it 30 years old in 2025.

What condition is Colf Road over Swan Creek 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 2024.

How much traffic does Colf Road over Swan Creek carry?

About 240 vehicles per day (2016 count), of which roughly 12% are trucks.

How long is Colf Road over Swan Creek?

The structure is 25 ft (7.6 m) long with a longest span of 22 ft (6.8 m).

Who owns Colf Road over Swan Creek?

It is owned by the County Highway Agency.