US Bridges

Prospect Road over I 25 Ml

Good

Larimer County, Colorado · Prospect RD/I25 · Structure no. B-16-AMA

Built
2021
4 years old
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
225 ft
2 main spans
Daily traffic
17,469
2023 count
Owner
State
State Highway Agency

About this bridge

Prospect Road over I 25 Ml is a prestressed concrete continuous stringer/multi-beam or girder carrying Prospect Road over I 25 Ml in Larimer 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 17,469 vehicles a day, roughly 14% of them trucks, projected to reach 21,837 by 2042. The structure is 225 ft (68.7 m) long and 118 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesProspect Road
CrossesI 25 Ml
LocationProspect RD/I25
RouteCity Street 0
Coordinates40.56642, -105.00189
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating46.4 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, precast panels
Main spans2
Design loadHL 93
Structure length225 ft (68.7 m)
Longest span111 ft (33.9 m)
Deck width118 ft (36 m)
Roadway width80 ft (24.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,469 (2023)
Projected traffic21,837 by 2042
Trucks14%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

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 Prospect Road over I 25 Ml built?

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

What condition is Prospect Road over I 25 Ml 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 May 2023.

How much traffic does Prospect Road over I 25 Ml carry?

About 17,469 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is Prospect Road over I 25 Ml?

The structure is 225 ft (68.7 m) long with a longest span of 111 ft (33.9 m) and a deck 118 ft wide.

Who owns Prospect Road over I 25 Ml?

It is owned by the State Highway Agency.