Structure 20903000001028 · Conejos County, CO

Fdr 255 over Alamosa River

Carries Fdr 255 over Alamosa River, 17 Mi Ssw Of Monte Vista.

Overall conditionGood

Set by its lowest-rated component: Deck at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructure8/9 · Very Good
Substructure8/9 · Very Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT85 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 8/9Substructure 8/9

85 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 multi-beam bridge.

Built1980rebuilt 1992
Length85.0 ft25.9 m
Daily traffic39counted 2002
Last inspectedJuly 2023every 24 months

Location

StateColorado
CountyConejos
Location17 Mi Ssw Of Monte Vista
CarriesFdr 255
CrossesAlamosa River
Coordinates37.34449, -106.25633

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length85.0 ft (25.9 m)
Max Span78.4 ft (23.9 m)
Deck Width16.1 ft (4.9 m)
Deck Area126.9 sq m
Main Spans1
Year Built1980 (reconstructed 1992)

Traffic

Avg Daily Traffic39 (2002)
Lanes On Bridge1

Inspection & Ownership

Last InspectionJuly 2023
Inspection FrequencyEvery 24 months
OwnerU.S. Forest Service
Historical SignificanceHistorical significance is not determined
Scour Critical5 — Stable for scour
Structure Number020903000001028

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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