US Bridges

County Road Ll over Arikaree River

Fair

Washington County, Colorado · 1.75 M. N. of Co. Rd. 1 · Structure no. WTNLL-02.75-A

Built
1998
27 years old
Condition
Fair
inspected October 2023
Type
Tee Beam
Prestressed Concrete
Length
211 ft
2 main spans
Daily traffic
16
2023 count
Owner
County
County Highway Agency

About this bridge

County Road Ll over Arikaree River is a prestressed concrete tee beam carrying County Road Ll over Arikaree River in Washington County, Colorado. It was built in 1998, so it is 27 years old, younger 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 16 vehicles a day, roughly 43% of them trucks, projected to reach 20 by 2042. The structure is 211 ft (64.3 m) long and 35 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCounty Road Ll
CrossesArikaree River
Location1.75 M. N. of Co. Rd. 1
RouteCounty Highway 0
CountyWashington County
StateColorado
Coordinates39.607, -103.06683
Functional classRural Major 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 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.1 US tons
Inventory rating40.9 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans2
Design loadHS 20
Structure length211 ft (64.3 m)
Longest span101 ft (30.8 m)
Deck width35 ft (10.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16 (2023)
Projected traffic20 by 2042
Trucks43%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Ll over Arikaree River built?

It was built in 1998, making it 27 years old in 2025.

What condition is County Road Ll over 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 October 2023.

How much traffic does County Road Ll over Arikaree River carry?

About 16 vehicles per day (2023 count), of which roughly 43% are trucks.

How long is County Road Ll over Arikaree River?

The structure is 211 ft (64.3 m) long with a longest span of 101 ft (30.8 m) and a deck 35 ft wide.

Who owns County Road Ll over Arikaree River?

It is owned by the County Highway Agency.