Structure 85007900.0004A · Montrose County, CO

County Road 79 over San Miguel River

Carries County Road 79 over San Miguel River, At Uravan/s Of SH 141.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructure7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT110 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 7/9

110 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.

Built198838 years old
Length109.9 ft33.5 m
Daily traffic36counted 2022
Last inspectedSeptember 2023every 24 months

Location

StateColorado
CountyMontrose
LocationAt Uravan/s Of SH 141
CarriesCounty Road 79
CrossesSan Miguel River
Coordinates38.37416, -108.74338

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length109.9 ft (33.5 m)
Max Span104.0 ft (31.7 m)
Deck Width33.1 ft (10.1 m)
Deck Area338.4 sq m
Main Spans1
Year Built1988

Traffic

Avg Daily Traffic36 (2022)
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number085007900.0004A

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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