US Bridges

County Road 39 over Sterling Seep Ditch No 1

Fair

Logan County, Colorado · 20 Ft N of CO RD 30.5 · Structure no. LOG39-30.5-256

Built
1992
33 years old
Condition
Fair
inspected January 2024
Type
Tee Beam
Prestressed Concrete
Length
27 ft
1 main span
Daily traffic
1,820
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 39 over Sterling Seep Ditch No 1 is a prestressed concrete tee beam carrying County Road 39 over Sterling Seep Ditch No 1 in Logan County, Colorado. It was built in 1992, so it is 33 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 1,820 vehicles a day, roughly 20% of them trucks, projected to reach 2,238 by 2042. The structure is 27 ft (8.1 m) long and 37 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCounty Road 39
CrossesSterling Seep Ditch No 1
Location20 Ft N of CO RD 30.5
RouteCounty Highway 0
CountyLogan County
StateColorado
Coordinates40.647, -103.2213
Functional classUrban 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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 US tons
Inventory rating36 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length27 ft (8.1 m)
Longest span24 ft (7.2 m)
Deck width37 ft (11.2 m)
Roadway width34 ft (10.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,820 (2023)
Projected traffic2,238 by 2042
Trucks20%
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 Seep Ditch No 1 built?

It was built in 1992, making it 33 years old in 2025.

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

About 1,820 vehicles per day (2023 count), of which roughly 20% are trucks.

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

The structure is 27 ft (8.1 m) long with a longest span of 24 ft (7.2 m) and a deck 37 ft wide.

Who owns County Road 39 over Sterling Seep Ditch No 1?

It is owned by the County Highway Agency.