US Bridges

County Road 9 over Larimer County Canal

Good

Larimer County, Colorado · 0.4 MI N of CO RD 56 · Structure no. LR9-0.4-56-A

Built
2018
7 years old
Condition
Good
inspected March 2025
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
37 ft
1 main span
Daily traffic
3,250
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 9 over Larimer County Canal is a prestressed concrete box beam or girders - single or spread carrying County Road 9 over Larimer County Canal in Larimer County, Colorado. It was built in 2018, so it is 7 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 3,250 vehicles a day, roughly 22% of them trucks, projected to reach 4,062 by 2043. The structure is 37 ft (11.4 m) long and 39 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesCounty Road 9
CrossesLarimer County Canal
Location0.4 MI N of CO RD 56
RouteCounty Highway 0
CountyLarimer County
StateColorado
Coordinates40.65897, -105.01958
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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable 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 rating40 US tons
Inventory rating36 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length37 ft (11.4 m)
Longest span32 ft (9.8 m)
Deck width39 ft (11.9 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,250 (2023)
Projected traffic4,062 by 2043
Trucks22%
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 9 over Larimer County Canal built?

It was built in 2018, making it 7 years old in 2025.

What condition is County Road 9 over Larimer County 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 March 2025.

How much traffic does County Road 9 over Larimer County Canal carry?

About 3,250 vehicles per day (2023 count), of which roughly 22% are trucks.

How long is County Road 9 over Larimer County Canal?

The structure is 37 ft (11.4 m) long with a longest span of 32 ft (9.8 m) and a deck 39 ft wide.

Who owns County Road 9 over Larimer County Canal?

It is owned by the County Highway Agency.