Structure LR17-0.5-S287 · Larimer County, CO

CR 17 (n Shields S over Terry Lake Inlet Canal

Carries CR 17 (n Shields S over Terry Lake Inlet Canal, 0.5 Mi N Of US HWY 287.

Overall conditionPoor

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

How ratings work
Deck8/9 · Very Good
Superstructuresets the rating4/9 · Poor
Substructure6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
23 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 4/9 · sets the ratingSubstructure 6/9

23 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 tee-beam bridge.

Built196264 years old
Length23.0 ft7 m
Daily traffic4,595counted 2023
Last inspectedMarch 2025every 24 months

Location

StateColorado
CountyLarimer
Location0.5 Mi N Of US HWY 287
CarriesCR 17 (n Shields S
CrossesTerry Lake Inlet Canal
Coordinates40.63297, -105.09522

Physical Characteristics

MaterialConcrete
DesignTee Beam
Total Length23.0 ft (7 m)
Max Span20.0 ft (6.1 m)
Deck Width30.2 ft (9.2 m)
Deck Area64.4 sq m
Main Spans1
Year Built1962

Traffic

Avg Daily Traffic4,595 (2023)
Truck Traffic16%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMarch 2025
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure NumberLR17-0.5-S287

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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