Structure E-17-SW · Adams County, CO

I 225 Ml Sbnd over I 70 Ml

Carries I 225 Ml Sbnd over I 70 Ml, Denver.

Overall conditionFair

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

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

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT1,967 FT OVERALL250 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 5/9 · sets the ratingSubstructure 7/9

1,967 ft end to end, longest span 280 ft: about 5.5 football fields. 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 box-beam bridge.

Built199432 years old
Length1966.9 ft599.5 m
Daily traffic60,500counted 2020
Last inspectedSeptember 2023every 24 months

Location

StateColorado
CountyAdams
LocationDenver
CarriesI 225 Ml Sbnd
CrossesI 70 Ml
Coordinates39.76901, -104.82825

Physical Characteristics

MaterialSteel Continuous
DesignBox Beam - Single/Spread
Total Length1966.9 ft (599.5 m)
Max Span279.9 ft (85.3 m)
Deck Width46.9 ft (14.3 m)
Deck Area8572.9 sq m
Main Spans8
Year Built1994

Traffic

Avg Daily Traffic60,500 (2020)
Truck Traffic7%
Lanes On Bridge2
Lanes Under Bridge8

Inspection & Ownership

Last InspectionSeptember 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure NumberE-17-SW

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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