US Bridges

County Road 39 over Sterling No 1 Ditch

Good

Logan County, Colorado · 0.8 MI N of CO RD 30 · Structure no. LOG39-30.8-97-A

Built
1988
37 years old
Condition
Good
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
45 ft
1 main span
Daily traffic
1,662
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 39 over Sterling No 1 Ditch is a steel stringer/multi-beam or girder carrying County Road 39 over Sterling No 1 Ditch in Logan County, Colorado. It was built in 1988, so it is 37 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 1,662 vehicles a day, roughly 27% of them trucks, projected to reach 2,044 by 2042. The structure is 45 ft (13.6 m) long and 33 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCounty Road 39
CrossesSterling No 1 Ditch
Location0.8 MI N of CO RD 30
RouteCounty Highway 0
CountyLogan County
StateColorado
Coordinates40.65317, -103.22158
Functional classUrban 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.9 US tons
Inventory rating34.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length45 ft (13.6 m)
Longest span36 ft (10.9 m)
Deck width33 ft (10 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,662 (2023)
Projected traffic2,044 by 2042
Trucks27%
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 39 over Sterling No 1 Ditch built?

It was built in 1988, making it 37 years old in 2025.

What condition is County Road 39 over Sterling No 1 Ditch 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 39 over Sterling No 1 Ditch carry?

About 1,662 vehicles per day (2023 count), of which roughly 27% are trucks.

How long is County Road 39 over Sterling No 1 Ditch?

The structure is 45 ft (13.6 m) long with a longest span of 36 ft (10.9 m) and a deck 33 ft wide.

Who owns County Road 39 over Sterling No 1 Ditch?

It is owned by the County Highway Agency.