US Bridges

County Road 20.5 over N. Sterling Inlet Canal

Fair

Logan County, Colorado · At JCT With CO RD 23 · Structure no. LOG20.5-23-34-A

Built
2000
25 years old
Condition
Fair
inspected January 2024
Type
Tee Beam
Prestressed Concrete
Length
47 ft
1 main span
Daily traffic
83
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 20.5 over N. Sterling Inlet Canal is a prestressed concrete tee beam carrying County Road 20.5 over N. Sterling Inlet Canal in Logan County, Colorado. It was built in 2000, so it is 25 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 83 vehicles a day, roughly 56% of them trucks, projected to reach 102 by 2042. The structure is 47 ft (14.3 m) long and 34 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesCounty Road 20.5
CrossesN. Sterling Inlet Canal
LocationAt JCT With CO RD 23
RouteCounty Highway 0
CountyLogan County
StateColorado
Coordinates40.57322, -103.37494
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2024
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating108.5 US tons
Inventory rating65.1 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length47 ft (14.3 m)
Longest span44 ft (13.4 m)
Deck width34 ft (10.5 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic83 (2023)
Projected traffic102 by 2042
Trucks56%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 20.5 over N. Sterling Inlet Canal built?

It was built in 2000, making it 25 years old in 2025.

What condition is County Road 20.5 over N. Sterling Inlet Canal 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 January 2024.

How much traffic does County Road 20.5 over N. Sterling Inlet Canal carry?

About 83 vehicles per day (2023 count), of which roughly 56% are trucks.

How long is County Road 20.5 over N. Sterling Inlet Canal?

The structure is 47 ft (14.3 m) long with a longest span of 44 ft (13.4 m) and a deck 34 ft wide.

Who owns County Road 20.5 over N. Sterling Inlet Canal?

It is owned by the County Highway Agency.