US Bridges

I 25 Ml over Box Elder Creek

Fair

Larimer County, Colorado · 0.5 MI S of JCT SH 14 · Structure no. B-16-EY

Built
1968
57 years old, rebuilt 1988
Condition
Fair
inspected May 2023
Type
Culvert
Concrete
Length
43 ft
4 main spans
Daily traffic
55,000
2020 count
Owner
State
State Highway Agency

About this bridge

I 25 Ml over Box Elder Creek is a concrete culvert carrying I 25 Ml over Box Elder Creek in Larimer County, Colorado. It was built in 1968 and reconstructed in 1988, so it is 57 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 5 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 55,000 vehicles a day, roughly 11% of them trucks, projected to reach 83,050 by 2040. The structure is 43 ft (13.2 m) long and 239 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesI 25 Ml
CrossesBox Elder Creek
Location0.5 MI S of JCT SH 14
RouteInterstate 25A
Coordinates40.57306, -105.00092
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 protection7 GoodSome minor problems.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.9 US tons
Inventory rating37.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans4
Design loadHS 20
Structure length43 ft (13.2 m)
Longest span10 ft (3 m)
Deck width239 ft (72.9 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic55,000 (2020)
Projected traffic83,050 by 2040
Trucks11%
Lanes on structure8
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 I 25 Ml over Box Elder Creek built?

It was built in 1968, making it 57 years old in 2025. It was reconstructed in 1988.

What condition is I 25 Ml over Box Elder Creek 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 May 2023.

How much traffic does I 25 Ml over Box Elder Creek carry?

About 55,000 vehicles per day (2020 count), of which roughly 11% are trucks.

How long is I 25 Ml over Box Elder Creek?

The structure is 43 ft (13.2 m) long with a longest span of 10 ft (3 m) and a deck 239 ft wide.

Who owns I 25 Ml over Box Elder Creek?

It is owned by the State Highway Agency.