US Bridges

County Road Nn over S.Fork Arikaree River

FairPosted for load

Kit Carson County, Colorado · 2.2 Miles West of Road 4 · Structure no. KITC-NN-1.80-02

Built
1959
66 years old
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
161 ft
4 main spans
Daily traffic
9
2022 count
Owner
County
County Highway Agency

About this bridge

County Road Nn over S.Fork Arikaree River is a steel stringer/multi-beam or girder carrying County Road Nn over S.Fork Arikaree River in Kit Carson County, Colorado. It was built in 1959, so it is 66 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. Its operating status is: posted for load restriction.

It carries about 9 vehicles a day, projected to reach 10 by 2042. The structure is 161 ft (49.1 m) long and 20 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesCounty Road Nn
CrossesS.Fork Arikaree River
Location2.2 Miles West of Road 4
RouteCounty Highway 0
CountyKit Carson County
StateColorado
Coordinates39.5495, -103.12241
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating28.5 US tons
Inventory rating17.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans4
Design loadUnknown
Structure length161 ft (49.1 m)
Longest span39 ft (12 m)
Deck width20 ft (6.1 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9 (2022)
Projected traffic10 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 Nn over S.Fork Arikaree River built?

It was built in 1959, making it 66 years old in 2025.

What condition is County Road Nn over S.Fork Arikaree 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 December 2023.

How much traffic does County Road Nn over S.Fork Arikaree River carry?

About 9 vehicles per day (2022 count).

How long is County Road Nn over S.Fork Arikaree River?

The structure is 161 ft (49.1 m) long with a longest span of 39 ft (12 m) and a deck 20 ft wide.

Who owns County Road Nn over S.Fork Arikaree River?

It is owned by the County Highway Agency.