Structure E-17-IJ · Adams County, CO

I 270 Ml Wbnd over Service RD Bnsf Rr

Carries I 270 Ml Wbnd over Service RD Bnsf Rr, In Commerce City.

Overall conditionPoor

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

How ratings work
Decksets the rating4/9 · Poor
Superstructure6/9 · Satisfactory
Substructure5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT338 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 4/9 · sets the ratingSuperstructure 6/9Substructure 5/9

338 ft end to end, longest span 75 ft: about 5 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 multi-beam bridge.

Built197056 years old
Length338.3 ft103.1 m
Daily traffic48,500counted 2020
Last inspectedAugust 2024every 24 months

Location

StateColorado
CountyAdams
LocationIn Commerce City
CarriesI 270 Ml Wbnd
CrossesService RD Bnsf Rr
Coordinates39.80400, -104.93814

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length338.3 ft (103.1 m)
Max Span75.5 ft (23 m)
Deck Width40.4 ft (12.3 m)
Deck Area1268.1 sq m
Main Spans5
Year Built1970

Traffic

Avg Daily Traffic48,500 (2020)
Truck Traffic11%
Lanes On Bridge2
Lanes Under Bridge4

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure NumberE-17-IJ

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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