Structure F-11-AL · Eagle County, CO

I 70 Ml Wbnd over Miller Creek

Carries I 70 Ml Wbnd over Miller Creek, 5.1 Mi W Of Vail Pass Sum.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT518 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 7/9

518 ft end to end, longest span 155 ft: about 7 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 segmental box-girder bridge.

Built1977rebuilt 1983
Length518.4 ft158 m
Daily traffic10,000counted 2020
Last inspectedAugust 2024every 24 months

Location

StateColorado
CountyEagle
Location5.1 Mi W Of Vail Pass Sum
CarriesI 70 Ml Wbnd
CrossesMiller Creek
Coordinates39.59502, -106.25322

Physical Characteristics

MaterialPrestressed Concrete Continuous
DesignSegmental Box Girder
Total Length518.4 ft (158 m)
Max Span154.9 ft (47.2 m)
Deck Width42.0 ft (12.8 m)
Deck Area2022.4 sq m
Main Spans4
Year Built1977 (reconstructed 1983)

Traffic

Avg Daily Traffic10,000 (2020)
Truck Traffic14%
Lanes On Bridge2

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure NumberF-11-AL

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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