US Bridges

I25 Ml+frontage RD over Windsor Res Canal

Fair

Larimer County, Colorado · 0.4 MI N of JCT SH1 · Structure no. B-17-DR

Built
1989
36 years old
Condition
Fair
inspected March 2021
Type
Culvert
Concrete
Length
20 ft
1 main span
Daily traffic
25,000
2020 count
Owner
State
State Highway Agency

About this bridge

I25 Ml+frontage RD over Windsor Res Canal is a concrete culvert carrying I25 Ml+frontage RD over Windsor Res Canal in Larimer County, Colorado. It was built in 1989, so it is 36 years old, younger 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 25,000 vehicles a day, roughly 14% of them trucks, projected to reach 37,500 by 2040. The structure is 20 ft (6.1 m) long and 280 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesI25 Ml+frontage RD
CrossesWindsor Res Canal
Location0.4 MI N of JCT SH1
RouteInterstate 25A
Coordinates40.70913, -104.99498
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 2021
Inspection intervalevery 48 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 rating110.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length20 ft (6.1 m)
Longest span20 ft (6.1 m)
Deck width280 ft (85.3 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25,000 (2020)
Projected traffic37,500 by 2040
Trucks14%
Lanes on structure6
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I25 Ml+frontage RD over Windsor Res Canal built?

It was built in 1989, making it 36 years old in 2025.

What condition is I25 Ml+frontage RD over Windsor Res 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 2021.

How much traffic does I25 Ml+frontage RD over Windsor Res Canal carry?

About 25,000 vehicles per day (2020 count), of which roughly 14% are trucks.

How long is I25 Ml+frontage RD over Windsor Res Canal?

The structure is 20 ft (6.1 m) long with a longest span of 20 ft (6.1 m) and a deck 280 ft wide.

Who owns I25 Ml+frontage RD over Windsor Res Canal?

It is owned by the State Highway Agency.