Structure 7201400 · Brown County, SD

104th Street over James River

Carries 104th Street over James River, 3n & 0.1e Of Stratford.

Overall conditionFair

Set by its lowest-rated component: Culvert at 5 of 9.

How ratings work
Culvertsets the rating5/9 · Fair
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT96 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 5/9

A culvert 96 ft across with 9 openings. 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.

Built194086 years old
Length96.1 ft29.3 m
Daily traffic98counted 2022
Last inspectedJuly 2024every 24 months

Location

StateSouth Dakota
CountyBrown
Location3n & 0.1e Of Stratford
Carries104th Street
CrossesJames River
Coordinates45.35724, -98.30671

Physical Characteristics

MaterialConcrete Continuous
DesignCulvert
Total Length96.1 ft (29.3 m)
Max Span9.8 ft (3 m)
Deck Area196.3 sq m
Main Spans9
Year Built1940

Traffic

Avg Daily Traffic98 (2022)
Truck Traffic2%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJuly 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number000000007201400

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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