Structure 7330104 · Brown County, SD

409th Avenue over Crow Creek Ditch

Carries 409th Avenue over Crow Creek Ditch, 7.6n & 1w Pf Claremont.

Overall conditionGood

Set by its lowest-rated component: Deck and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructure8/9 · Very Good
Substructuresets the rating7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT40 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 8/9Substructure 7/9 · sets the rating

40 ft end to end. 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 or the layout of the shorter spans, so those are drawn as typical for a tee-beam bridge.

Built201610 years old
Length40.0 ft12.2 m
Daily traffic98counted 2022
Last inspectedSeptember 2024every 24 months

Location

StateSouth Dakota
CountyBrown
Location7.6n & 1w Pf Claremont
Carries409th Avenue
CrossesCrow Creek Ditch
Coordinates45.78588, -98.04132

Physical Characteristics

MaterialPrestressed Concrete
DesignTee Beam
Total Length40.0 ft (12.2 m)
Max Span38.1 ft (11.6 m)
Deck Width30.8 ft (9.4 m)
Deck Area114.7 sq m
Main Spans1
Year Built2016

Traffic

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

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number000000007330104

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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