US Bridges

I 25 Ml Nbnd over ST Vrain River

Good

Weld County, Colorado · 1 Mile N of JCT 119 · Structure no. D-17-EQ

Built
2008
17 years old
Condition
Good
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
316 ft
4 main spans
Daily traffic
40,000
2020 count
Owner
State
State Highway Agency

About this bridge

I 25 Ml Nbnd over ST Vrain River is a prestressed concrete continuous stringer/multi-beam or girder carrying I 25 Ml Nbnd over ST Vrain River in Weld County, Colorado. It was built in 2008, so it is 17 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 40,000 vehicles a day, roughly 10% of them trucks, projected to reach 58,800 by 2040. The structure is 316 ft (96.3 m) long and 67 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesI 25 Ml Nbnd
CrossesST Vrain River
Location1 Mile N of JCT 119
RouteInterstate 25A
Coordinates40.17466, -104.97941
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50 US tons
Inventory rating39.2 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, precast panels
Main spans4
Design loadHL 93
Structure length316 ft (96.3 m)
Longest span87 ft (26.5 m)
Deck width67 ft (20.4 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40,000 (2020)
Projected traffic58,800 by 2040
Trucks10%
Lanes on structure3
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 ST Vrain River built?

It was built in 2008, making it 17 years old in 2025.

What condition is I 25 Ml Nbnd over ST Vrain River 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 June 2023.

How much traffic does I 25 Ml Nbnd over ST Vrain River carry?

About 40,000 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is I 25 Ml Nbnd over ST Vrain River?

The structure is 316 ft (96.3 m) long with a longest span of 87 ft (26.5 m) and a deck 67 ft wide.

Who owns I 25 Ml Nbnd over ST Vrain River?

It is owned by the State Highway Agency.