Structure COMC-07-0.2-01 · Adams County, CO

Potomac Street over Obrian Canal

Carries Potomac Street over Obrian Canal, 0.2 Mile North Of SH 2.

Overall conditionPoor

Set by its lowest-rated component: Deck at 2 of 9.

How ratings work
Decksets the rating2/9 · Critical
Superstructure3/9 · Serious
Substructure4/9 · Poor
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT66 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 2/9 · sets the ratingSuperstructure 3/9Substructure 4/9

66 ft end to end. Lengths and the car 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 through truss.

Built194086 years old
Length66.3 ft20.2 m
Daily traffic190counted 2021
Last inspectedDecember 2024every 6 months

Location

StateColorado
CountyAdams
Location0.2 Mile North Of SH 2
CarriesPotomac Street
CrossesObrian Canal
Coordinates39.90393, -104.82784

Physical Characteristics

MaterialSteel
DesignTruss - Thru
Total Length66.3 ft (20.2 m)
Max Span61.4 ft (18.7 m)
Deck Width20.0 ft (6.1 m)
Deck Area123.2 sq m
Main Spans1
Year Built1940

Traffic

Avg Daily Traffic190 (2021)
Truck Traffic20%
Lanes On Bridge1

Inspection & Ownership

Last InspectionDecember 2024
Inspection FrequencyEvery 6 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour Critical5 — Stable for scour
Structure NumberCOMC-07-0.2-01

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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