US Bridges

County Road 70 over North Poudre Canal

Fair

Larimer County, Colorado · 50 Ft E of CO RD 13 · Structure no. LR70-0.0-13

Built
1950
75 years old, rebuilt 1977
Condition
Fair
inspected March 2025
Type
Tee Beam
Prestressed Concrete
Length
25 ft
1 main span
Daily traffic
5,642
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 70 over North Poudre Canal is a prestressed concrete tee beam carrying County Road 70 over North Poudre Canal in Larimer County, Colorado. It was built in 1950 and reconstructed in 1977, so it is 75 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 5,642 vehicles a day, roughly 31% of them trucks, projected to reach 7,052 by 2043. The structure is 25 ft (7.6 m) long and 30 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCounty Road 70
CrossesNorth Poudre Canal
Location50 Ft E of CO RD 13
RouteCounty Highway 0
CountyLarimer County
StateColorado
Coordinates40.75486, -105.05789
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57 US tons
Inventory rating34.1 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadUnknown
Structure length25 ft (7.6 m)
Longest span22 ft (6.8 m)
Deck width30 ft (9.1 m)
Roadway width29 ft (8.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,642 (2023)
Projected traffic7,052 by 2043
Trucks31%
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 70 over North Poudre Canal built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 1977.

What condition is County Road 70 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 70 over North Poudre Canal carry?

About 5,642 vehicles per day (2023 count), of which roughly 31% are trucks.

How long is County Road 70 over North Poudre Canal?

The structure is 25 ft (7.6 m) long with a longest span of 22 ft (6.8 m) and a deck 30 ft wide.

Who owns County Road 70 over North Poudre Canal?

It is owned by the County Highway Agency.