Structure F-19-AJ · Arapahoe County, CO

I 70 Strasburg Spu over Up Rr

Carries I 70 Strasburg Spu over Up Rr, 0.15 Mi N Of Jct I 70 Ml.

Overall conditionPoor

Set by its lowest-rated component: Substructure at 4 of 9.

How ratings work
Deck5/9 · Fair
Superstructure5/9 · Fair
Substructuresets the rating4/9 · Poor
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT142 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 5/9Substructure 4/9 · sets the rating

142 ft end to end, longest span 52 ft. 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 multi-beam bridge.

Built196264 years old
Length142.1 ft43.3 m
Daily traffic4,400counted 2020
Last inspectedApril 2023every 24 months

Location

StateColorado
CountyArapahoe
Location0.15 Mi N Of Jct I 70 Ml
CarriesI 70 Strasburg Spu
CrossesUp Rr
Coordinates39.73643, -104.32633

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length142.1 ft (43.3 m)
Max Span52.5 ft (16 m)
Deck Width32.2 ft (9.8 m)
Deck Area424.3 sq m
Main Spans3
Year Built1962

Traffic

Avg Daily Traffic4,400 (2020)
Truck Traffic4%
Lanes On 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-19-AJ

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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