Structure 52398303 · Pennington County, SD

Canyon Lake DR over Rapid Ck

Carries Canyon Lake DR over Rapid Ck, .2w Canyon Lk&mt View -rc.

Overall conditionFair

Set by its lowest-rated component: Deck and Superstructure at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT164 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 6/9 · sets the ratingSubstructure 7/9

164 ft end to end, longest span 43 ft: about 2 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 slab bridge.

Built200323 years old
Length164.0 ft50 m
Daily traffic8,885counted 2022
Last inspectedApril 2024every 24 months

Location

StateSouth Dakota
CountyPennington
Location.2w Canyon Lk&mt View -rc
CarriesCanyon Lake DR
CrossesRapid Ck
Coordinates44.07845, -103.25533

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length164.0 ft (50 m)
Max Span42.7 ft (13 m)
Deck Width51.2 ft (15.6 m)
Deck Area780 sq m
Main Spans4
Year Built2003

Traffic

Avg Daily Traffic8,885 (2022)
Truck Traffic3%
Lanes On Bridge3

Inspection & Ownership

Last InspectionApril 2024
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number000000052398303

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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