Structure C-18-AP · Weld County, CO

US 34 Ml Wbnd over US 85 Bus RT

Carries US 34 Ml Wbnd over US 85 Bus RT, In Evans.

Overall conditionPoor

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

How ratings work
Decksets the rating4/9 · Poor
Superstructure5/9 · Fair
Substructure5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT233 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 4/9 · sets the ratingSuperstructure 5/9Substructure 5/9

233 ft end to end, longest span 65 ft: about 3 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 tee-beam bridge.

Built196264 years old
Length232.6 ft70.9 m
Daily traffic16,500counted 2020
Last inspectedAugust 2023every 24 months

Location

StateColorado
CountyWeld
LocationIn Evans
CarriesUS 34 Ml Wbnd
CrossesUS 85 Bus RT
Coordinates40.39199, -104.68788

Physical Characteristics

MaterialConcrete Continuous
DesignTee Beam
Total Length232.6 ft (70.9 m)
Max Span65.0 ft (19.8 m)
Deck Width44.0 ft (13.4 m)
Deck Area950.1 sq m
Main Spans4
Year Built1962

Traffic

Avg Daily Traffic16,500 (2020)
Truck Traffic6%
Lanes On Bridge3
Lanes Under Bridge5

Inspection & Ownership

Last InspectionAugust 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure NumberC-18-AP

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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