US Bridges

271 Street over Cottonwood Ck

PoorPosted for load

Tripp County, South Dakota · 0.8E & 1.9N Witten · Structure no. 000000062088211

Built
1945
80 years old
Condition
Poor
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
60 ft
4 main spans
Daily traffic
50
2022 count
Owner
County
County Highway Agency

About this bridge

271 Street over Cottonwood Ck is a steel stringer/multi-beam or girder carrying 271 Street over Cottonwood Ck in Tripp County, South Dakota. It was built in 1945, so it is 80 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 50 vehicles a day, roughly 2% of them trucks, projected to reach 50 by 2032. The structure is 60 ft (18.3 m) long and 20 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Carries271 Street
CrossesCottonwood Ck
Location0.8E & 1.9N Witten
RouteCounty Highway 0
Coordinates43.47184, -100.07207
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating9 US tons
Inventory rating5.4 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans4
Design loadHS 20 + Mod
Structure length60 ft (18.3 m)
Longest span15 ft (4.6 m)
Deck width20 ft (6.1 m)
Roadway width19 ft (5.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2022)
Projected traffic50 by 2032
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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$9,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 271 Street over Cottonwood Ck built?

It was built in 1945, making it 80 years old in 2025.

What condition is 271 Street over Cottonwood Ck 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 July 2024.

How much traffic does 271 Street over Cottonwood Ck carry?

About 50 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 271 Street over Cottonwood Ck?

The structure is 60 ft (18.3 m) long with a longest span of 15 ft (4.6 m) and a deck 20 ft wide.

Who owns 271 Street over Cottonwood Ck?

It is owned by the County Highway Agency.