US Bridges

I 25 Ml over Lake Canal

Fair

Larimer County, Colorado · 11.3 MI N of JCT SH 34 · Structure no. B-16-BK

Built
1966
59 years old, rebuilt 1988
Condition
Fair
inspected March 2023
Type
Culvert
Concrete
Length
39 ft
1 main span
Daily traffic
55,000
2020 count
Owner
State
State Highway Agency

About this bridge

I 25 Ml over Lake Canal is a concrete culvert carrying I 25 Ml over Lake Canal in Larimer County, Colorado. It was built in 1966 and reconstructed in 1988, so it is 59 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 6 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 55,000 vehicles a day, roughly 11% of them trucks, projected to reach 83,050 by 2040. The structure is 39 ft (11.9 m) long and 235 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesI 25 Ml
CrossesLake Canal
Location11.3 MI N of JCT SH 34
RouteInterstate 25A
Coordinates40.5703, -105.0011
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating69 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length39 ft (11.9 m)
Longest span39 ft (11.9 m)
Deck width235 ft (71.6 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic55,000 (2020)
Projected traffic83,050 by 2040
Trucks11%
Lanes on structure9
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$495,000
NavigationNo navigation control on waterway

Frequently asked questions

When was I 25 Ml over Lake Canal built?

It was built in 1966, making it 59 years old in 2025. It was reconstructed in 1988.

What condition is I 25 Ml over Lake 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 2023.

How much traffic does I 25 Ml over Lake Canal carry?

About 55,000 vehicles per day (2020 count), of which roughly 11% are trucks.

How long is I 25 Ml over Lake Canal?

The structure is 39 ft (11.9 m) long with a longest span of 39 ft (11.9 m) and a deck 235 ft wide.

Who owns I 25 Ml over Lake Canal?

It is owned by the State Highway Agency.