US Bridges

I 25 Ml Nbnd over Larimer County Canal

Fair

Larimer County, Colorado · 5.2 MI N of JCT SH 14 · Structure no. B-16-DP

Built
1950
75 years old, rebuilt 1989
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
33 ft
1 main span
Daily traffic
14,000
2020 count
Owner
State
State Highway Agency

About this bridge

I 25 Ml Nbnd over Larimer County Canal is a steel stringer/multi-beam or girder carrying I 25 Ml Nbnd over Larimer County Canal in Larimer County, Colorado. It was built in 1950 and reconstructed in 1989, 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 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 14,000 vehicles a day, roughly 19% of them trucks, projected to reach 21,560 by 2040. The structure is 33 ft (10.2 m) long and 40 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesI 25 Ml Nbnd
CrossesLarimer County Canal
Location5.2 MI N of JCT SH 14
RouteInterstate 25A
CountyLarimer County
StateColorado
Coordinates40.65588, -105.00064
Functional classRural 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
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
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating79 US tons
Inventory rating47.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length33 ft (10.2 m)
Longest span30 ft (9.1 m)
Deck width40 ft (12.3 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,000 (2020)
Projected traffic21,560 by 2040
Trucks19%
Lanes on structure2
Traffic directionOne-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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I 25 Ml Nbnd over Larimer County Canal built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 1989.

What condition is I 25 Ml Nbnd over Larimer County 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 Nbnd over Larimer County Canal carry?

About 14,000 vehicles per day (2020 count), of which roughly 19% are trucks.

How long is I 25 Ml Nbnd over Larimer County Canal?

The structure is 33 ft (10.2 m) long with a longest span of 30 ft (9.1 m) and a deck 40 ft wide.

Who owns I 25 Ml Nbnd over Larimer County Canal?

It is owned by the State Highway Agency.