US Bridges

County Road 66 over Harmony No. 1 Canal

Good

Logan County, Colorado · 0.2 MI E of CO RD 89 · Structure no. LOG66-89.2-202A

Built
1991
34 years old
Condition
Good
inspected December 2023
Type
Tee Beam
Prestressed Concrete
Length
35 ft
1 main span
Daily traffic
23
2022 count
Owner
County
County Highway Agency

About this bridge

County Road 66 over Harmony No. 1 Canal is a prestressed concrete tee beam carrying County Road 66 over Harmony No. 1 Canal in Logan County, Colorado. It was built in 1991, so it is 34 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 23 vehicles a day, roughly 65% of them trucks, projected to reach 29 by 2042. The structure is 35 ft (10.8 m) long and 31 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesCounty Road 66
CrossesHarmony No. 1 Canal
Location0.2 MI E of CO RD 89
RouteCounty Highway 0
CountyLogan County
StateColorado
Coordinates40.90955, -102.72495
Functional classRural Local

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 inspectionDecember 2023
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 rating83.1 US tons
Inventory rating51.4 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length35 ft (10.8 m)
Longest span32 ft (9.8 m)
Deck width31 ft (9.3 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23 (2022)
Projected traffic29 by 2042
Trucks65%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 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 Harmony No. 1 Canal built?

It was built in 1991, making it 34 years old in 2025.

What condition is County Road 66 over Harmony No. 1 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 December 2023.

How much traffic does County Road 66 over Harmony No. 1 Canal carry?

About 23 vehicles per day (2022 count), of which roughly 65% are trucks.

How long is County Road 66 over Harmony No. 1 Canal?

The structure is 35 ft (10.8 m) long with a longest span of 32 ft (9.8 m) and a deck 31 ft wide.

Who owns County Road 66 over Harmony No. 1 Canal?

It is owned by the County Highway Agency.