US Bridges

237 Street over South Fork Bad River

PoorPosted for load

Jackson County, South Dakota · 6.7E Cottonwood · Structure no. 000000036186018

Built
1935
90 years old
Condition
Poor
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
120 ft
4 main spans
Daily traffic
11
2022 count
Owner
County
County Highway Agency

About this bridge

237 Street over South Fork Bad River is a steel stringer/multi-beam or girder carrying 237 Street over South Fork Bad River in Jackson County, South Dakota. It was built in 1935, so it is 90 years old, older than the South Dakota average of 48.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 11 vehicles a day, roughly 2% of them trucks, projected to reach 11 by 2032. The structure is 120 ft (36.6 m) long and 21 ft wide. If it were closed, the detour would be 28 mi (45 km).

Carries237 Street
CrossesSouth Fork Bad River
Location6.7E Cottonwood
RouteCounty Highway 0
Coordinates43.96912, -101.76731
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating26.1 US tons
Inventory rating15.7 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length120 ft (36.6 m)
Longest span30 ft (9.1 m)
Deck width21 ft (6.3 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11 (2022)
Projected traffic11 by 2032
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed28 mi (45 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$17,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 237 Street over South Fork Bad River built?

It was built in 1935, making it 90 years old in 2025.

What condition is 237 Street over South Fork Bad River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in September 2023.

How much traffic does 237 Street over South Fork Bad River carry?

About 11 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 237 Street over South Fork Bad River?

The structure is 120 ft (36.6 m) long with a longest span of 30 ft (9.1 m) and a deck 21 ft wide.

Who owns 237 Street over South Fork Bad River?

It is owned by the County Highway Agency.