US Bridges

I 25 Ml & Ramps over Channel Md-B

Good

Weld County, Colorado · Longmont/Dacono Exit · Structure no. D-17-DR

Built
2000
25 years old
Condition
Good
inspected March 2023
Type
Culvert
Concrete
Length
31 ft
3 main spans
Daily traffic
91,000
2020 count
Owner
State
State Highway Agency

About this bridge

I 25 Ml & Ramps over Channel Md-B is a concrete culvert carrying I 25 Ml & Ramps over Channel Md-B in Weld County, Colorado. It was built in 2000, so it is 25 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 91,000 vehicles a day, roughly 9% of them trucks, projected to reach 137,410 by 2040. The structure is 31 ft (9.3 m) long and 326 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesI 25 Ml & Ramps
CrossesChannel Md-B
LocationLongmont/Dacono Exit
RouteInterstate 25A
Coordinates40.09151, -104.97983
Functional classUrban 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
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionMarch 2023
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 rating46.8 US tons
Inventory rating28.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20 + Mod
Structure length31 ft (9.3 m)
Longest span9 ft (2.6 m)
Deck width326 ft (99.4 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic91,000 (2020)
Projected traffic137,410 by 2040
Trucks9%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 & Ramps over Channel Md-B built?

It was built in 2000, making it 25 years old in 2025.

What condition is I 25 Ml & Ramps over Channel Md-B 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 March 2023.

How much traffic does I 25 Ml & Ramps over Channel Md-B carry?

About 91,000 vehicles per day (2020 count), of which roughly 9% are trucks.

How long is I 25 Ml & Ramps over Channel Md-B?

The structure is 31 ft (9.3 m) long with a longest span of 9 ft (2.6 m) and a deck 326 ft wide.

Who owns I 25 Ml & Ramps over Channel Md-B?

It is owned by the State Highway Agency.