US Bridges

NB I-25 Onramp over I-25 Offramp to Broadway

Fair

Denver County, Colorado · I-25/WASHINGTON St. · Structure no. F-17-NB

Built
2005
20 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
348 ft
2 main spans
Daily traffic
94,000
2020 count
Owner
State
State Highway Agency

About this bridge

NB I-25 Onramp over I-25 Offramp to Broadway is a prestressed concrete continuous stringer/multi-beam or girder carrying NB I-25 Onramp over I-25 Offramp to Broadway in Denver County, Colorado. It was built in 2005, so it is 20 years old, younger 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 6 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 94,000 vehicles a day, roughly 6% of them trucks, projected to reach 113,740 by 2040. The structure is 348 ft (106.2 m) long and 28 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesNB I-25 Onramp
CrossesI-25 Offramp to Broadway
LocationI-25/WASHINGTON St.
RouteInterstate 25A
CountyDenver County
StateColorado
Coordinates39.69521, -104.97976
Functional classUrban Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.8 US tons
Inventory rating46.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, precast panels
Main spans2 (+1 approach)
Design loadHS 25 or greater
Structure length348 ft (106.2 m)
Longest span93 ft (28.3 m)
Deck width28 ft (8.5 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic94,000 (2020)
Projected traffic113,740 by 2040
Trucks6%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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 NB I-25 Onramp over I-25 Offramp to Broadway built?

It was built in 2005, making it 20 years old in 2025.

What condition is NB I-25 Onramp over I-25 Offramp to Broadway 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 June 2024.

How much traffic does NB I-25 Onramp over I-25 Offramp to Broadway carry?

About 94,000 vehicles per day (2020 count), of which roughly 6% are trucks.

How long is NB I-25 Onramp over I-25 Offramp to Broadway?

The structure is 348 ft (106.2 m) long with a longest span of 93 ft (28.3 m) and a deck 28 ft wide.

Who owns NB I-25 Onramp over I-25 Offramp to Broadway?

It is owned by the State Highway Agency.