US Bridges

County Road 18 over N. Sterling Inlet Canal

Good

Logan County, Colorado · 25 Ft. W. of Co. Rd. 25 · Structure no. LOG18-25.0-26-A

Built
1987
38 years old
Condition
Good
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
53 ft
1 main span
Daily traffic
202
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 18 over N. Sterling Inlet Canal is a steel stringer/multi-beam or girder carrying County Road 18 over N. Sterling Inlet Canal in Logan County, Colorado. It was built in 1987, so it is 38 years old, younger 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.

It carries about 202 vehicles a day, roughly 37% of them trucks, projected to reach 248 by 2042. The structure is 53 ft (16.1 m) long and 34 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCounty Road 18
CrossesN. Sterling Inlet Canal
Location25 Ft. W. of Co. Rd. 25
RouteCounty Highway 0
CountyLogan County
StateColorado
Coordinates40.55128, -103.3513
Functional classRural Minor Collector

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 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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40.3 US tons
Inventory rating24.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length53 ft (16.1 m)
Longest span47 ft (14.2 m)
Deck width34 ft (10.4 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic202 (2023)
Projected traffic248 by 2042
Trucks37%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 18 over N. Sterling Inlet Canal built?

It was built in 1987, making it 38 years old in 2025.

What condition is County Road 18 over N. Sterling Inlet Canal 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 January 2024.

How much traffic does County Road 18 over N. Sterling Inlet Canal carry?

About 202 vehicles per day (2023 count), of which roughly 37% are trucks.

How long is County Road 18 over N. Sterling Inlet Canal?

The structure is 53 ft (16.1 m) long with a longest span of 47 ft (14.2 m) and a deck 34 ft wide.

Who owns County Road 18 over N. Sterling Inlet Canal?

It is owned by the County Highway Agency.