Structure LOG34-41.4-261 · Logan County, CO

County Road 34 over Sterling Ditch No 1

Carries County Road 34 over Sterling Ditch No 1, 0.4 Mi E Of Co RD 41.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructure8/9 · Very Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
24 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 7/9 · sets the ratingSubstructure 8/9

24 ft end to end. Lengths are drawn to scale; at this length a semi-truck would be a speck. 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
Length24.0 ft7.3 m
Daily traffic313counted 2023
Last inspectedJanuary 2024every 48 months

Location

StateColorado
CountyLogan
Location0.4 Mi E Of Co RD 41
CarriesCounty Road 34
CrossesSterling Ditch No 1
Coordinates40.66961, -103.19466

Physical Characteristics

MaterialConcrete
DesignBox Beam - Multiple
Total Length24.0 ft (7.3 m)
Max Span20.7 ft (6.3 m)
Deck Width34.4 ft (10.5 m)
Deck Area76.7 sq m
Main Spans1
Year Built1994

Traffic

Avg Daily Traffic313 (2023)
Truck Traffic34%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJanuary 2024
Inspection FrequencyEvery 48 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure NumberLOG34-41.4-261

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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