US Bridges

County Road 76 over Yampa River

Fair

Routt County, Colorado · 0.6 MI N of US HWY 40 · Structure no. 107007600.60905

Built
1978
47 years old
Condition
Fair
inspected October 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
192 ft
1 main span
Daily traffic
513
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 76 over Yampa River is a prestressed concrete box beam or girders - multiple carrying County Road 76 over Yampa River in Routt County, Colorado. It was built in 1978, so it is 47 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 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 513 vehicles a day, roughly 32% of them trucks, projected to reach 611 by 2042. The structure is 192 ft (58.5 m) long and 28 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

Location

Open in Google Maps
CarriesCounty Road 76
CrossesYampa River
Location0.6 MI N of US HWY 40
RouteCounty Highway 0
CountyRoutt County
StateColorado
Coordinates40.50225, -107.26427
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to 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 alignment8: Equal to present desirable criteria
Operating rating54.1 US tons
Inventory rating30.1 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckOther
Main spans1 (+2 approach)
Design loadHS 20
Structure length192 ft (58.5 m)
Longest span77 ft (23.5 m)
Deck width28 ft (8.6 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic513 (2023)
Projected traffic611 by 2042
Trucks32%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was County Road 76 over Yampa River built?

It was built in 1978, making it 47 years old in 2025.

What condition is County Road 76 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 2024.

How much traffic does County Road 76 over Yampa River carry?

About 513 vehicles per day (2023 count), of which roughly 32% are trucks.

How long is County Road 76 over Yampa River?

The structure is 192 ft (58.5 m) long with a longest span of 77 ft (23.5 m) and a deck 28 ft wide.

Who owns County Road 76 over Yampa River?

It is owned by the County Highway Agency.