US Bridges

County Road 17 over Yampa River

Fair

Moffat County, Colorado · 7.3 MI South of US HWY 40 · Structure no. MOF17-13.35

Built
1968
57 years old
Condition
Fair
inspected October 2023
Type
Girder and Floorbeam System
Steel Continuous
Length
211 ft
2 main spans
Daily traffic
105
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 17 over Yampa River is a steel continuous girder and floorbeam system carrying County Road 17 over Yampa River in Moffat County, Colorado. It was built in 1968, so it is 57 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 105 vehicles a day, roughly 17% of them trucks, projected to reach 123 by 2042. The structure is 211 ft (64.2 m) long and 24 ft wide. If it were closed, the detour would be 29.8 mi (48 km).

Location

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CarriesCounty Road 17
CrossesYampa River
Location7.3 MI South of US HWY 40
RouteCounty Highway 0
CountyMoffat County
StateColorado
Coordinates40.44704, -107.90606
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
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being 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 alignment6: Equal to present minimum criteria
Operating rating37.1 US tons
Inventory rating22.3 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel Continuous
DeckCorrugated steel
Main spans2
Design loadUnknown
Structure length211 ft (64.2 m)
Longest span105 ft (31.9 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic105 (2023)
Projected traffic123 by 2042
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed29.8 mi (48 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 17 over Yampa River built?

It was built in 1968, making it 57 years old in 2025.

What condition is County Road 17 over Yampa 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 October 2023.

How much traffic does County Road 17 over Yampa River carry?

About 105 vehicles per day (2023 count), of which roughly 17% are trucks.

How long is County Road 17 over Yampa River?

The structure is 211 ft (64.2 m) long with a longest span of 105 ft (31.9 m) and a deck 24 ft wide.

Who owns County Road 17 over Yampa River?

It is owned by the County Highway Agency.