Structure THN-WAS146-LD · Adams County, CO

Washington Street over Local Drainage

Carries Washington Street over Local Drainage, 0.3 Mi N Of 144th AVE.

Overall conditionGood

Set by its lowest-rated component: Substructure at 8 of 9.

How ratings work
Superstructure9/9 · Excellent
Substructuresets the rating8/9 · Very Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT42 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck not ratedSuperstructure 9/9Substructure 8/9 · sets the rating

42 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 deck arch.

Built20188 years old
Length41.7 ft12.7 m
Daily traffic8,317counted 2021
Last inspectedJanuary 2024every 24 months

Location

StateColorado
CountyAdams
Location0.3 Mi N Of 144th AVE
CarriesWashington Street
CrossesLocal Drainage
Coordinates39.96178, -104.97834

Physical Characteristics

MaterialConcrete
DesignArch - Deck
Total Length41.7 ft (12.7 m)
Max Span40.0 ft (12.2 m)
Deck Width181.8 ft (55.4 m)
Deck Area703.6 sq m
Main Spans1
Year Built2018

Traffic

Avg Daily Traffic8,317 (2021)
Lanes On Bridge5

Inspection & Ownership

Last InspectionJanuary 2024
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure NumberTHN-WAS146-LD

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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