US Bridges

County Road 11 over Colorado River

Fair

Grand County, Colorado · 0.1 MI So of Radium · Structure no. 049001100.1005A

Built
1989
36 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
210 ft
3 main spans
Daily traffic
80
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 11 over Colorado River is a prestressed concrete continuous stringer/multi-beam or girder carrying County Road 11 over Colorado River in Grand County, Colorado. It was built in 1989, so it is 36 years old, younger 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 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 80 vehicles a day, roughly 9% of them trucks, projected to reach 95 by 2042. The structure is 210 ft (63.9 m) long and 30 ft wide. If it were closed, the detour would be 28 mi (45 km).

Location

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CarriesCounty Road 11
CrossesColorado River
Location0.1 MI So of Radium
RouteCounty Highway 0
CountyGrand County
StateColorado
Coordinates39.95196, -106.55701
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length210 ft (63.9 m)
Longest span97 ft (29.6 m)
Deck width30 ft (9.1 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic80 (2023)
Projected traffic95 by 2042
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed28 mi (45 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 11 over Colorado River built?

It was built in 1989, making it 36 years old in 2025.

What condition is County Road 11 over Colorado 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 September 2023.

How much traffic does County Road 11 over Colorado River carry?

About 80 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is County Road 11 over Colorado River?

The structure is 210 ft (63.9 m) long with a longest span of 97 ft (29.6 m) and a deck 30 ft wide.

Who owns County Road 11 over Colorado River?

It is owned by the County Highway Agency.