Structure D-20-B · Morgan County, CO

I 76 Ml Wbnd over Bijou Creek

Carries I 76 Ml Wbnd over Bijou Creek, 1 Mi E Of Wiggins.

Overall conditionFair

Set by its lowest-rated component: Substructure at 5 of 9.

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating5/9 · Fair
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT451 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 5/9 · sets the rating

451 ft end to end, longest span 50 ft: about 6 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.

Built1955rebuilt 1978
Length451.4 ft137.6 m
Daily traffic9,500counted 2020
Last inspectedFebruary 2025every 24 months

Location

StateColorado
CountyMorgan
Location1 Mi E Of Wiggins
CarriesI 76 Ml Wbnd
CrossesBijou Creek
Coordinates40.24824, -104.03691

Physical Characteristics

MaterialConcrete
DesignTee Beam
Total Length451.4 ft (137.6 m)
Max Span49.9 ft (15.2 m)
Deck Width42.3 ft (12.9 m)
Deck Area1775.0 sq m
Main Spans9
Year Built1955 (reconstructed 1978)

Traffic

Avg Daily Traffic9,500 (2020)
Truck Traffic17%
Lanes On Bridge2

Inspection & Ownership

Last InspectionFebruary 2025
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure NumberD-20-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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