US Bridges

I 25 NB Ml over Wildlife Underpass

Good

Douglas County, Colorado · 3.2 MI N of Greenland RD · Structure no. H-17-CM

Built
2021
4 years old
Condition
Good
inspected February 2025
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
110 ft
1 main span
Daily traffic
66,000
2020 count
Owner
State
State Highway Agency

About this bridge

I 25 NB Ml over Wildlife Underpass is a prestressed concrete stringer/multi-beam or girder carrying I 25 NB Ml over Wildlife Underpass in Douglas County, Colorado. It was built in 2021, so it is 4 years old, younger than the Colorado average of 42.2 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 66,000 vehicles a day, roughly 7% of them trucks, projected to reach 98,670 by 2042. The structure is 110 ft (33.5 m) long and 76 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

CarriesI 25 NB Ml
CrossesWildlife Underpass
Location3.2 MI N of Greenland RD
RouteInterstate 25A
Coordinates39.22628, -104.87819
Functional classRural Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating50 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length110 ft (33.5 m)
Longest span104 ft (31.7 m)
Deck width76 ft (23.3 m)
Roadway width73 ft (22.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic66,000 (2020)
Projected traffic98,670 by 2042
Trucks7%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesOther
Detour if closed2.5 mi (4 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 25 NB Ml over Wildlife Underpass built?

It was built in 2021, making it 4 years old in 2025.

What condition is I 25 NB Ml over Wildlife Underpass in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in February 2025.

How much traffic does I 25 NB Ml over Wildlife Underpass carry?

About 66,000 vehicles per day (2020 count), of which roughly 7% are trucks.

How long is I 25 NB Ml over Wildlife Underpass?

The structure is 110 ft (33.5 m) long with a longest span of 104 ft (31.7 m) and a deck 76 ft wide.

Who owns I 25 NB Ml over Wildlife Underpass?

It is owned by the State Highway Agency.