Structure J-12-AJ · Chaffee County, CO

US 285 Ml over Draw

Carries US 285 Ml over Draw, 9.1 Mi N. Of Poncha Sprgs.

Overall conditionPoor

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

How ratings work
Culvertsets the rating4/9 · Poor
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
20 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 4/9

A culvert 20 ft across. Lengths are drawn to scale; at this length a semi-truck would be a speck. 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.

Built195769 years old
Length20.3 ft6.2 m
Daily traffic8,600counted 2020
Last inspectedDecember 2023every 24 months

Location

StateColorado
CountyChaffee
Location9.1 Mi N. Of Poncha Sprgs
CarriesUS 285 Ml
CrossesDraw
Coordinates38.65024, -106.08470

Physical Characteristics

MaterialSteel
DesignCulvert
Total Length20.3 ft (6.2 m)
Max Span20.3 ft (6.2 m)
Deck Width117.1 ft (35.7 m)
Deck Area221.3 sq m
Main Spans1
Year Built1957

Traffic

Avg Daily Traffic8,600 (2020)
Truck Traffic7%
Lanes On Bridge3

Inspection & Ownership

Last InspectionDecember 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure NumberJ-12-AJ

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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