Structure E-18-B · Adams County, CO

I 76 Ml over West Burlington Canal

Carries I 76 Ml over West Burlington Canal, 0.3 Mi W Of Jct Sh7.

Overall conditionFair

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

How ratings work
Culvertsets the rating6/9 · Satisfactory
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

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

A culvert 22 ft across with 2 openings. 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.

Built1935rebuilt 1986
Length21.7 ft6.6 m
Daily traffic28,000counted 2020
Last inspectedMarch 2025every 24 months

Location

StateColorado
CountyAdams
Location0.3 Mi W Of Jct Sh7
CarriesI 76 Ml
CrossesWest Burlington Canal
Coordinates39.98355, -104.73891

Physical Characteristics

MaterialConcrete
DesignCulvert
Total Length21.7 ft (6.6 m)
Max Span10.2 ft (3.1 m)
Deck Width242.5 ft (73.9 m)
Deck Area487.7 sq m
Main Spans2
Year Built1935 (reconstructed 1986)

Traffic

Avg Daily Traffic28,000 (2020)
Truck Traffic15%
Lanes On Bridge8

Inspection & Ownership

Last InspectionMarch 2025
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure NumberE-18-B

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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