US Bridges

County Road 6W over Michigan River

Fair

Jackson County, Colorado · 1.3 MI W of ST HWY 125 · Structure no. 057006W01.30004

Built
1958
67 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
71 ft
4 main spans
Daily traffic
179
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 6W over Michigan River is a steel continuous stringer/multi-beam or girder carrying County Road 6W over Michigan River in Jackson County, Colorado. It was built in 1958, so it is 67 years old, older than the Colorado average of 42.2 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 179 vehicles a day, roughly 18% of them trucks, projected to reach 233 by 2043. The structure is 71 ft (21.5 m) long and 24 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesCounty Road 6W
CrossesMichigan River
Location1.3 MI W of ST HWY 125
RouteCounty Highway 0
CountyJackson County
StateColorado
Coordinates40.8621, -106.33706
Functional classRural Minor 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating29.1 US tons
Inventory rating17.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckCorrugated steel
Main spans4
Design loadUnknown
Structure length71 ft (21.5 m)
Longest span17 ft (5.1 m)
Deck width24 ft (7.4 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic179 (2023)
Projected traffic233 by 2043
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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 County Road 6W over Michigan River built?

It was built in 1958, making it 67 years old in 2025.

What condition is County Road 6W over Michigan 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 November 2024.

How much traffic does County Road 6W over Michigan River carry?

About 179 vehicles per day (2023 count), of which roughly 18% are trucks.

How long is County Road 6W over Michigan River?

The structure is 71 ft (21.5 m) long with a longest span of 17 ft (5.1 m) and a deck 24 ft wide.

Who owns County Road 6W over Michigan River?

It is owned by the County Highway Agency.