Structure F-16-CJ · Jefferson County, CO

US 285 Ml over Turkey Creek

Carries US 285 Ml over Turkey Creek, Below 285 & C470 Inte.

Overall conditionFair

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

How ratings work
Culvertsets the rating5/9 · Fair
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT48 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 5/9

A culvert 48 ft across. 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, so those are drawn as typical for a culvert.

Built196858 years old
Length47.9 ft14.6 m
Daily traffic39,000counted 2020
Last inspectedAugust 2023every 24 months

Location

StateColorado
CountyJefferson
LocationBelow 285 & C470 Inte
CarriesUS 285 Ml
CrossesTurkey Creek
Coordinates39.63477, -105.16980

Physical Characteristics

MaterialConcrete
DesignCulvert
Total Length47.9 ft (14.6 m)
Max Span47.9 ft (14.6 m)
Deck Width9.8 ft (3 m)
Deck Area43.8 sq m
Main Spans1
Year Built1968

Traffic

Avg Daily Traffic39,000 (2020)
Truck Traffic5%
Lanes On Bridge8

Inspection & Ownership

Last InspectionAugust 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure NumberF-16-CJ

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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