US Bridges

Twnshp RD 170th ST over Ck

Good

Deuel County, South Dakota · 2.0N 3.9E Tunerville · Structure no. 000000020139040

Built
2020
5 years old
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
45 ft
1 main span
Daily traffic
25
2022 count
Owner
County
County Highway Agency

About this bridge

Twnshp RD 170th ST over Ck is a steel stringer/multi-beam or girder carrying Twnshp RD 170th ST over Ck in Deuel County, South Dakota. It was built in 2020, so it is 5 years old, younger than the South Dakota average of 48.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 25 vehicles a day, roughly 2% of them trucks, projected to reach 25 by 2032. The structure is 45 ft (13.8 m) long and 25 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesTwnshp RD 170th ST
CrossesCk
Location2.0N 3.9E Tunerville
RouteCounty Highway 0
Coordinates44.91887, -96.59931
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52 US tons
Inventory rating40 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHL 93
Structure length45 ft (13.8 m)
Longest span41 ft (12.6 m)
Deck width25 ft (7.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2022)
Projected traffic25 by 2032
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Twnshp RD 170th ST over Ck built?

It was built in 2020, making it 5 years old in 2025.

What condition is Twnshp RD 170th ST over Ck in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2024.

How much traffic does Twnshp RD 170th ST over Ck carry?

About 25 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is Twnshp RD 170th ST over Ck?

The structure is 45 ft (13.8 m) long with a longest span of 41 ft (12.6 m) and a deck 25 ft wide.

Who owns Twnshp RD 170th ST over Ck?

It is owned by the County Highway Agency.