Structure F-13-L · Clear Creek County, CO

I 70 Ml Ebnd over County Road

Carries I 70 Ml Ebnd over County Road, 5 Mi E Of Eisenhower Tunn.

Overall conditionFair

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

How ratings work
Decksets the rating5/9 · Fair
Superstructure6/9 · Satisfactory
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT144 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 6/9Substructure 7/9

144 ft end to end, longest span 58 ft: about 2 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.

Built197254 years old
Length144.0 ft43.9 m
Daily traffic16,500counted 2020
Last inspectedApril 2023every 24 months

Location

StateColorado
CountyClear Creek
Location5 Mi E Of Eisenhower Tunn
CarriesI 70 Ml Ebnd
CrossesCounty Road
Coordinates39.70154, -105.85735

Physical Characteristics

MaterialConcrete Continuous
DesignTee Beam
Total Length144.0 ft (43.9 m)
Max Span58.1 ft (17.7 m)
Deck Width44.6 ft (13.6 m)
Deck Area597.0 sq m
Main Spans3
Year Built1972

Traffic

Avg Daily Traffic16,500 (2020)
Truck Traffic9%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionApril 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure NumberF-13-L

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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