US Bridges

County Road 15.5 over N. Sterling Inlet Canal

Good

Logan County, Colorado · 0.3 MI N. of Co. Line · Structure no. LOG15.5-2.3-15A

Built
1999
26 years old
Condition
Good
inspected January 2024
Type
Tee Beam
Prestressed Concrete
Length
46 ft
1 main span
Daily traffic
21
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 15.5 over N. Sterling Inlet Canal is a prestressed concrete tee beam carrying County Road 15.5 over N. Sterling Inlet Canal in Logan County, Colorado. It was built in 1999, so it is 26 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 21 vehicles a day, roughly 42% of them trucks, projected to reach 26 by 2042. The structure is 46 ft (14 m) long and 34 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesCounty Road 15.5
CrossesN. Sterling Inlet Canal
Location0.3 MI N. of Co. Line
RouteCounty Highway 0
CountyLogan County
StateColorado
Coordinates40.44147, -103.43661
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 evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating96.6 US tons
Inventory rating59.7 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length46 ft (14 m)
Longest span43 ft (13.1 m)
Deck width34 ft (10.5 m)
Roadway width32 ft (9.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21 (2023)
Projected traffic26 by 2042
Trucks42%
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 15.5 over N. Sterling Inlet Canal built?

It was built in 1999, making it 26 years old in 2025.

What condition is County Road 15.5 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 15.5 over N. Sterling Inlet Canal carry?

About 21 vehicles per day (2023 count), of which roughly 42% are trucks.

How long is County Road 15.5 over N. Sterling Inlet Canal?

The structure is 46 ft (14 m) long with a longest span of 43 ft (13.1 m) and a deck 34 ft wide.

Who owns County Road 15.5 over N. Sterling Inlet Canal?

It is owned by the County Highway Agency.