US Bridges

County Road 323 over Colorado River

Fair

Garfield County, Colorado · 0.5 MI So of I-70 Exit 81 · Structure no. GAR323-01.43

Built
1975
50 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
233 ft
2 main spans
Daily traffic
599
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 323 over Colorado River is a prestressed concrete continuous stringer/multi-beam or girder carrying County Road 323 over Colorado River in Garfield County, Colorado. It was built in 1975, so it is 50 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 599 vehicles a day, roughly 39% of them trucks, projected to reach 761 by 2042. The structure is 233 ft (71 m) long and 32 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

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CarriesCounty Road 323
CrossesColorado River
Location0.5 MI So of I-70 Exit 81
RouteCounty Highway 0
CountyGarfield County
StateColorado
Coordinates39.49389, -107.93889
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating40 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length233 ft (71 m)
Longest span112 ft (34.1 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic599 (2023)
Projected traffic761 by 2042
Trucks39%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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 323 over Colorado River built?

It was built in 1975, making it 50 years old in 2025.

What condition is County Road 323 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 323 over Colorado River carry?

About 599 vehicles per day (2023 count), of which roughly 39% are trucks.

How long is County Road 323 over Colorado River?

The structure is 233 ft (71 m) long with a longest span of 112 ft (34.1 m) and a deck 32 ft wide.

Who owns County Road 323 over Colorado River?

It is owned by the County Highway Agency.