Structure F-16-OG · Denver County, CO

Ramp To I 25 Nbnd over US 6 Ml

Carries Ramp To I 25 Nbnd over US 6 Ml, Jct I25 + Sh6 In Denver.

Overall conditionPoor

Set by its lowest-rated component: Superstructure at 4 of 9.

How ratings work
Deck7/9 · Good
Superstructuresets the rating4/9 · Poor
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT1,378 FT OVERALL250 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 4/9 · sets the ratingSubstructure 7/9

1,378 ft end to end, longest span 125 ft: about 3.8 football fields. Lengths and the semi-truck on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a box-beam bridge.

Built198937 years old
Length1378.3 ft420.1 m
Daily traffic—reported figure implausible
Last inspectedMarch 2025every 12 months

Location

StateColorado
CountyDenver
LocationJct I25 + Sh6 In Denver
CarriesRamp To I 25 Nbnd
CrossesUS 6 Ml
Coordinates39.72449, -105.01498

Physical Characteristics

MaterialSteel Continuous
DesignBox Beam - Single/Spread
Total Length1378.3 ft (420.1 m)
Max Span124.7 ft (38 m)
Deck Width42.0 ft (12.8 m)
Deck Area5377.3 sq m
Main Spans12
Year Built1989

Traffic

Avg Daily Traffic107,500 (2020)
That is about 53,750 vehicles per lane per day — beyond what any U.S. road carries (the busiest freeways run about 25,000–30,000). It is almost certainly a data-entry error in the National Bridge Inventory, so we leave this bridge out of traffic rankings.
Truck Traffic6%
Lanes On Bridge2
Lanes Under Bridge16

Inspection & Ownership

Last InspectionMarch 2025
Inspection FrequencyEvery 12 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure NumberF-16-OG

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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