US Bridges

County Road Kk over Bonny Dam Spillway

GoodPosted for load

Yuma County, Colorado · 7 MI E of SR 325 · Structure no. NKA-SFUURD-001

Built
1951
74 years old
Condition
Good
inspected May 2024
Type
Tee Beam
Concrete
Length
126 ft
3 main spans
Daily traffic
5
2018 count
Owner
Federal
Bureau of Reclamation

About this bridge

County Road Kk over Bonny Dam Spillway is a concrete tee beam carrying County Road Kk over Bonny Dam Spillway in Yuma County, Colorado. It was built in 1951, so it is 74 years old, older than the Colorado average of 42.2 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. Its operating status is: posted for load restriction.

It carries about 5 vehicles a day, projected to reach 5 by 2042. The structure is 126 ft (38.3 m) long and 26 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

Open in Google Maps
CarriesCounty Road Kk
CrossesBonny Dam Spillway
Location7 MI E of SR 325
RouteCounty Highway 0
CountyYuma County
StateColorado
Coordinates39.63233, -102.17787
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating28.5 US tons
Inventory rating22.2 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length126 ft (38.3 m)
Longest span51 ft (15.5 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5 (2018)
Projected traffic5 by 2042
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerBureau of Reclamation
Maintained byBureau of Reclamation
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road Kk over Bonny Dam Spillway built?

It was built in 1951, making it 74 years old in 2025.

What condition is County Road Kk over Bonny Dam Spillway in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2024.

How much traffic does County Road Kk over Bonny Dam Spillway carry?

About 5 vehicles per day (2018 count).

How long is County Road Kk over Bonny Dam Spillway?

The structure is 126 ft (38.3 m) long with a longest span of 51 ft (15.5 m) and a deck 26 ft wide.

Who owns County Road Kk over Bonny Dam Spillway?

It is owned by the Bureau of Reclamation.