473rd Avenue over Big Sioux River

Fair Condition50 years old50 vehicles/day

Location

StateSouth Dakota
CountyMoody
Location8.0w & 8.9n Of Flandreau
Carries473rd Avenue
CrossesBig Sioux River
Coordinates44.18027, -96.74962

Condition Ratings

Overall ConditionFair
Deck6 (Satisfactory)
Superstructure5 (Fair)
Substructure6 (Satisfactory)
Channel/Waterway5 (Fair)
Scour CriticalUnknown

Physical Characteristics

MaterialPrestressed Concrete
DesignTee Beam
Total Length149.9 ft (45.7 m)
Max Span48.9 ft (14.9 m)
Deck Width30.2 ft (9.2 m)
Deck Area420.4 sq m
Main Spans3
Year Built1976

Traffic

Avg Daily Traffic50 (2022)
Truck Traffic2%
Lanes On Bridge2

Inspection & Ownership

Last Inspection724
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Structure Number000000051070011

Nearby Bridges

I029 N over Big Sioux Rv 0.5 mi Poor I029 S over Big Sioux Rv 0.5 mi Poor 220th Street over Medary Ck 1.3 mi Fair I029 N over 223 ST (fas) 2.0 mi Fair I029 S over 223 ST (fas) 2.0 mi Fair 475th Avenue over Trib. To Big Sioux River 2.0 mi Fair 219 ST over I029 2.1 mi Fair 219th Street over Medary Creek 2.2 mi Fair 475th Avenue over Big Sioux River 2.2 mi Fair 219th Street over Ck 2.2 mi Poor