US Bridges

County Road 15 over North Poudre Canal

Fair

Larimer County, Colorado · 0.9 MI N of CO RD 68 · Structure no. LR15-0.9-68

Built
1930
95 years old, rebuilt 1978
Condition
Fair
inspected March 2025
Type
Tee Beam
Concrete
Length
36 ft
1 main span
Daily traffic
1,103
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 15 over North Poudre Canal is a concrete tee beam carrying County Road 15 over North Poudre Canal in Larimer County, Colorado. It was built in 1930 and reconstructed in 1978, so it is 95 years old, older 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 5 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 1,103 vehicles a day, roughly 15% of them trucks, projected to reach 1,378 by 2043. The structure is 36 ft (10.9 m) long and 26 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesCounty Road 15
CrossesNorth Poudre Canal
Location0.9 MI N of CO RD 68
RouteCounty Highway 0
CountyLarimer County
StateColorado
Coordinates40.75267, -105.07603
Functional classRural Major 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be 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 typeTee Beam
MaterialConcrete
DeckOther
Main spans1
Design loadUnknown
Structure length36 ft (10.9 m)
Longest span31 ft (9.6 m)
Deck width26 ft (8 m)
Roadway width25 ft (7.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,103 (2023)
Projected traffic1,378 by 2043
Trucks15%
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 15 over North Poudre Canal built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1978.

What condition is County Road 15 over North Poudre Canal 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 March 2025.

How much traffic does County Road 15 over North Poudre Canal carry?

About 1,103 vehicles per day (2023 count), of which roughly 15% are trucks.

How long is County Road 15 over North Poudre Canal?

The structure is 36 ft (10.9 m) long with a longest span of 31 ft (9.6 m) and a deck 26 ft wide.

Who owns County Road 15 over North Poudre Canal?

It is owned by the County Highway Agency.