Structure 48022211 · Mellette County, SD

Sd044 over Black Pipe Ck

Carries Sd044 over Black Pipe Ck, 0.3 E Jct Sd 63.

Overall conditionFair

Set by its lowest-rated component: Substructure at 6 of 9.

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT151 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

151 ft end to end, longest span 39 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.

Built198739 years old
Length150.6 ft45.9 m
Daily traffic302counted 2024
Last inspectedMay 2024every 12 months

Location

StateSouth Dakota
CountyMellette
Location0.3 E Jct Sd 63
CarriesSd044
CrossesBlack Pipe Ck
Coordinates43.56235, -101.19631

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length150.6 ft (45.9 m)
Max Span38.7 ft (11.8 m)
Deck Width38.7 ft (11.8 m)
Deck Area541.6 sq m
Main Spans4
Year Built1987

Traffic

Avg Daily Traffic302 (2024)
Truck Traffic16%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMay 2024
Inspection FrequencyEvery 12 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical3 — Scour critical
Structure Number000000048022211

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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