Structure F-16-O · Jefferson County, CO

US 6 Ml over SH 121 Ml

Carries US 6 Ml over SH 121 Ml, In Lakewood.

Overall conditionPoor

Set by its lowest-rated component: Deck at 3 of 9.

How ratings work
Decksets the rating3/9 · Serious
Superstructure4/9 · Poor
Substructure5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT190 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 3/9 · sets the ratingSuperstructure 4/9Substructure 5/9

190 ft end to end, longest span 52 ft: about 3 semi-trucks nose to tail. 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 tee-beam bridge.

Built197254 years old
Length190.0 ft57.9 m
Daily traffic101,000counted 2020
Last inspectedJanuary 2025every 12 months

Location

StateColorado
CountyJefferson
LocationIn Lakewood
CarriesUS 6 Ml
CrossesSH 121 Ml
Coordinates39.72540, -105.08189

Physical Characteristics

MaterialConcrete Continuous
DesignTee Beam
Total Length190.0 ft (57.9 m)
Max Span51.8 ft (15.8 m)
Deck Width111.9 ft (34.1 m)
Deck Area1974.4 sq m
Main Spans4
Year Built1972

Traffic

Avg Daily Traffic101,000 (2020)
Truck Traffic2%
Lanes On Bridge8
Lanes Under Bridge6

Inspection & Ownership

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

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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