Structure F-16-IO · Jefferson County, CO

US 6 Ml over Indiana AVE

Carries US 6 Ml over Indiana AVE, 1.1 Mi E Of Jct US 40.

Overall conditionFair

Set by its lowest-rated component: Substructure at 5 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructure7/9 · Good
Substructuresets the rating5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT166 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 7/9Substructure 5/9 · sets the rating

166 ft end to end, longest span 78 ft: about 2 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 multi-beam bridge.

Built197155 years old
Length166.0 ft50.6 m
Daily traffic60,000counted 2020
Last inspectedNovember 2023every 24 months

Location

StateColorado
CountyJefferson
Location1.1 Mi E Of Jct US 40
CarriesUS 6 Ml
CrossesIndiana AVE
Coordinates39.72519, -105.16578

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length166.0 ft (50.6 m)
Max Span78.4 ft (23.9 m)
Deck Width110.6 ft (33.7 m)
Deck Area1705.2 sq m
Main Spans2
Year Built1971

Traffic

Avg Daily Traffic60,000 (2020)
Truck Traffic2%
Lanes On Bridge6
Lanes Under Bridge9

Inspection & Ownership

Last InspectionNovember 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure NumberF-16-IO

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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