Structure FCLAPT-0.0-WHTM · Larimer County, CO

Whitcomb/laporte over Arthur Ditch

Carries Whitcomb/laporte over Arthur Ditch, Whitcomb At Laporte.

Overall conditionGood

Set by its lowest-rated component: Culvert at 7 of 9.

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

Elevation

Side view, colored by inspection rating
CAR · 15 FT52 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 7/9

A culvert 52 ft across. 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, so those are drawn as typical for a culvert.

Built201313 years old
Length51.5 ft15.7 m
Daily traffic261counted 2023
Last inspectedMarch 2025every 24 months

Location

StateColorado
CountyLarimer
LocationWhitcomb At Laporte
CarriesWhitcomb/laporte
CrossesArthur Ditch
Coordinates40.58883, -105.08611

Physical Characteristics

MaterialConcrete
DesignCulvert
Total Length51.5 ft (15.7 m)
Max Span51.5 ft (15.7 m)
Deck Width86.0 ft (26.2 m)
Deck Area411.3 sq m
Main Spans1
Year Built2013

Traffic

Avg Daily Traffic261 (2023)
Truck Traffic5%
Lanes On Bridge4

Inspection & Ownership

Last InspectionMarch 2025
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure NumberFCLAPT-0.0-WHTM

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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