Structure E-17-NB · Adams County, CO

US 36 Ml over SH 224 Ml/n Broadway

Carries US 36 Ml over SH 224 Ml/n Broadway, US 36 Over North Broadway.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT145 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 6/9 · sets the rating

145 ft end to end, longest span 48 ft: about 2 semi-trucks nose to tail. Lengths and the semi-truck 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.

Built1986rebuilt 1997
Length145.3 ft44.3 m
Daily traffic144,000counted 2020
Last inspectedAugust 2024every 24 months

Location

StateColorado
CountyAdams
LocationUS 36 Over North Broadway
CarriesUS 36 Ml
CrossesSH 224 Ml/n Broadway
Coordinates39.82739, -104.98763

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length145.3 ft (44.3 m)
Max Span47.9 ft (14.6 m)
Deck Width145.0 ft (44.2 m)
Deck Area1958.1 sq m
Main Spans4
Year Built1986 (reconstructed 1997)

Traffic

Avg Daily Traffic144,000 (2020)
Truck Traffic2%
Lanes On Bridge8
Lanes Under Bridge4

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure NumberE-17-NB

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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