US Bridges

Prospect Avenue over Box Elder Creek

Good

Larimer County, Colorado · 0.5 MI West of I25 · Structure no. FCPROS-0.5-I25A

Built
2016
9 years old
Condition
Good
inspected June 2023
Type
Culvert
Concrete
Length
39 ft
2 main spans
Daily traffic
20,967
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Prospect Avenue over Box Elder Creek is a concrete culvert carrying Prospect Avenue over Box Elder Creek in Larimer County, Colorado. It was built in 2016, so it is 9 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 20,967 vehicles a day, roughly 4% of them trucks, projected to reach 26,209 by 2042. The structure is 39 ft (11.8 m) long and 106 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesProspect Avenue
CrossesBox Elder Creek
Location0.5 MI West of I25
RouteCity Street 0
Coordinates40.56672, -105.00717
Functional classUrban Minor Arterial

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 protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadUnknown
Structure length39 ft (11.8 m)
Longest span18 ft (5.5 m)
Deck width106 ft (32.2 m)
Roadway width83 ft (25.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,967 (2023)
Projected traffic26,209 by 2042
Trucks4%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Prospect Avenue over Box Elder Creek built?

It was built in 2016, making it 9 years old in 2025.

What condition is Prospect Avenue over Box Elder Creek 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 Prospect Avenue over Box Elder Creek carry?

About 20,967 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Prospect Avenue over Box Elder Creek?

The structure is 39 ft (11.8 m) long with a longest span of 18 ft (5.5 m) and a deck 106 ft wide.

Who owns Prospect Avenue over Box Elder Creek?

It is owned by the City or Municipal Highway Agency.