US Bridges

W Kemp Avenue over Big Sioux River

Fair

Codington County, South Dakota · 0.3E of 10th Street NW · Structure no. 000000015181171

Built
1935
90 years old
Condition
Fair
inspected August 2023
Type
Culvert
Steel
Length
108 ft
5 main spans
Daily traffic
5,053
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

W Kemp Avenue over Big Sioux River is a steel culvert carrying W Kemp Avenue over Big Sioux River in Codington 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 fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 5,053 vehicles a day, roughly 8% of them trucks, projected to reach 5,053 by 2032. The structure is 108 ft (32.9 m) long. If it were closed, the detour would be 1.2 mi (2 km).

CarriesW Kemp Avenue
CrossesBig Sioux River
Location0.3E of 10th Street NW
RouteCity Street 0
Coordinates44.9027, -97.12572
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating35.1 US tons
Inventory rating27 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans5
Design loadUnknown
Structure length108 ft (32.9 m)
Longest span19 ft (5.9 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,053 (2022)
Projected traffic5,053 by 2032
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusListed on the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.9 million (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was W Kemp Avenue over Big Sioux River built?

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

What condition is W Kemp Avenue over Big Sioux River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in August 2023.

How much traffic does W Kemp Avenue over Big Sioux River carry?

About 5,053 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is W Kemp Avenue over Big Sioux River?

The structure is 108 ft (32.9 m) long with a longest span of 19 ft (5.9 m).

Who owns W Kemp Avenue over Big Sioux River?

It is owned by the City or Municipal Highway Agency.