US Bridges

I 25 Ml over Ramp to I25 SB Walnut ST

Fair

Denver County, Colorado · I25 SH33 US 40 Intercha · Structure no. F-16-DQ

Built
1952
73 years old, rebuilt 1987
Condition
Fair
inspected March 2024
Type
Frame
Concrete
Length
120 ft
2 main spans
Daily traffic
212,000
2020 count
Owner
State
State Highway Agency

About this bridge

I 25 Ml over Ramp to I25 SB Walnut ST is a concrete frame carrying I 25 Ml over Ramp to I25 SB Walnut ST in Denver County, Colorado. It was built in 1952 and reconstructed in 1987, so it is 73 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 212,000 vehicles a day, roughly 7% of them trucks, projected to reach 248,040 by 2040. The structure is 120 ft (36.6 m) long and 149 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesI 25 Ml
CrossesRamp to I25 SB Walnut ST
LocationI25 SH33 US 40 Intercha
RouteInterstate 25A
CountyDenver County
StateColorado
Coordinates39.74185, -105.01436
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57 US tons
Inventory rating34.1 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length120 ft (36.6 m)
Longest span59 ft (18 m)
Deck width149 ft (45.5 m)
Roadway width144 ft (44 m)
Vertical clearance over deck18 ft (5.5 m)

Traffic and service

Average daily traffic212,000 (2020)
Projected traffic248,040 by 2040
Trucks7%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 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 Ramp to I25 SB Walnut ST built?

It was built in 1952, making it 73 years old in 2025. It was reconstructed in 1987.

What condition is I 25 Ml over Ramp to I25 SB Walnut ST 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 March 2024.

How much traffic does I 25 Ml over Ramp to I25 SB Walnut ST carry?

About 212,000 vehicles per day (2020 count), of which roughly 7% are trucks.

How long is I 25 Ml over Ramp to I25 SB Walnut ST?

The structure is 120 ft (36.6 m) long with a longest span of 59 ft (18 m) and a deck 149 ft wide.

Who owns I 25 Ml over Ramp to I25 SB Walnut ST?

It is owned by the State Highway Agency.