Structure 210269 · Jefferson County, CO

West Gate Road over S Boulder Diversion Cana

Carries West Gate Road over S Boulder Diversion Cana, 0.2 Mile East Of SH 93.

Overall conditionFair

Set by its lowest-rated component: Substructure at 6 of 9.

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT47 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

47 ft end to end. Lengths and the car 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.

Built1952rebuilt 1973
Length47.2 ft14.4 m
Daily traffic740counted 2024
Last inspectedNovember 2024every 24 months

Location

StateColorado
CountyJefferson
Location0.2 Mile East Of SH 93
CarriesWest Gate Road
CrossesS Boulder Diversion Cana
Coordinates39.88556, -105.23778

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length47.2 ft (14.4 m)
Max Span42.3 ft (12.9 m)
Deck Width65.9 ft (20.1 m)
Deck Area289.4 sq m
Main Spans1
Year Built1952 (reconstructed 1973)

Traffic

Avg Daily Traffic740 (2024)
Truck Traffic70%
Lanes On Bridge4

Inspection & Ownership

Last InspectionNovember 2024
Inspection FrequencyEvery 24 months
OwnerCode 79
Historical SignificanceBridge is not eligible for the National Register
Scour Critical3 — Scour critical
Structure Number000000000210269

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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