US Bridges

County Road 66 over Duck Creek

Poor

Logan County, Colorado · 0.9 MI E of CO RD 81 · Structure no. LOG66-81.9-200A

Built
1993
32 years old
Condition
Poor
inspected December 2024
Type
Culvert
Steel
Length
20 ft
2 main spans
Daily traffic
44
2022 count
Owner
County
County Highway Agency

About this bridge

County Road 66 over Duck Creek is a steel culvert carrying County Road 66 over Duck Creek in Logan County, Colorado. It was built in 1993, so it is 32 years old, younger than the Colorado average of 42.2 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 44 vehicles a day, roughly 27% of them trucks, projected to reach 54 by 2042. The structure is 20 ft (6.1 m) long and 40 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCounty Road 66
CrossesDuck Creek
Location0.9 MI E of CO RD 81
RouteCounty Highway 0
CountyLogan County
StateColorado
Coordinates40.90878, -102.78891
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionDecember 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating66.9 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadHS 20
Structure length20 ft (6.1 m)
Longest span8 ft (2.4 m)
Deck width40 ft (12.2 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic44 (2022)
Projected traffic54 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 66 over Duck Creek built?

It was built in 1993, making it 32 years old in 2025.

What condition is County Road 66 over Duck Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in December 2024.

How much traffic does County Road 66 over Duck Creek carry?

About 44 vehicles per day (2022 count), of which roughly 27% are trucks.

How long is County Road 66 over Duck Creek?

The structure is 20 ft (6.1 m) long with a longest span of 8 ft (2.4 m) and a deck 40 ft wide.

Who owns County Road 66 over Duck Creek?

It is owned by the County Highway Agency.