Structure E-17-NZ · Adams County, CO

Ramp To I 76 Wbnd over I 25 Ml R

Carries Ramp To I 76 Wbnd over I 25 Ml R, I25 & I76 Jct.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT546 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 6/9 · sets the ratingSubstructure 7/9

546 ft end to end, longest span 225 ft: about 1.5 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.

Built199135 years old
Length545.9 ft166.4 m
Daily traffic37,000counted 2020
Last inspectedJune 2023every 24 months

Location

StateColorado
CountyAdams
LocationI25 & I76 Jct
CarriesRamp To I 76 Wbnd
CrossesI 25 Ml R
Coordinates39.81790, -104.98376

Physical Characteristics

MaterialSteel Continuous
DesignBox Beam - Single/Spread
Total Length545.9 ft (166.4 m)
Max Span225.1 ft (68.6 m)
Deck Width69.9 ft (21.3 m)
Deck Area3544.3 sq m
Main Spans3
Year Built1991

Traffic

Avg Daily Traffic37,000 (2020)
Truck Traffic11%
Lanes On Bridge2
Lanes Under Bridge13

Inspection & Ownership

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

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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