Structure COMC-08-2.5-01A · Adams County, CO

120th Avenue over Third Creek

Carries 120th Avenue over Third Creek, .5 Mi West Of Tower Road.

Overall conditionFair

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

How ratings work
Culvertsets the rating6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT76 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 6/9

A culvert 76 ft across with 7 openings. 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.

Built200125 years old
Length76.1 ft23.2 m
Daily traffic15,963counted 2021
Last inspectedDecember 2023every 24 months

Location

StateColorado
CountyAdams
Location.5 Mi West Of Tower Road
Carries120th Avenue
CrossesThird Creek
Coordinates39.91416, -104.78025

Physical Characteristics

MaterialConcrete
DesignCulvert
Total Length76.1 ft (23.2 m)
Max Span10.2 ft (3.1 m)
Deck Width140.1 ft (42.7 m)
Deck Area990.6 sq m
Main Spans7
Year Built2001

Traffic

Avg Daily Traffic15,963 (2021)
Truck Traffic2%
Lanes On Bridge3

Inspection & Ownership

Last InspectionDecember 2023
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure NumberCOMC-08-2.5-01A

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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