US Bridges

158 ST Cty RD 12 over Deep Ck

Good

Perkins County, South Dakota · 16.6W 5.9N Faith · Structure no. 000000053284580

Built
2004
21 years old
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
97 ft
1 main span
Daily traffic
15
2022 count
Owner
County
County Highway Agency

About this bridge

158 ST Cty RD 12 over Deep Ck is a prestressed concrete stringer/multi-beam or girder carrying 158 ST Cty RD 12 over Deep Ck in Perkins County, South Dakota. It was built in 2004, so it is 21 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 15 vehicles a day, roughly 3% of them trucks, projected to reach 16 by 2032. The structure is 97 ft (29.6 m) long and 32 ft wide. If it were closed, the detour would be 23 mi (37 km).

Carries158 ST Cty RD 12
CrossesDeep Ck
Location16.6W 5.9N Faith
RouteCounty Highway 0
Coordinates45.11116, -102.3778
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating55.6 US tons
Inventory rating30.2 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length97 ft (29.6 m)
Longest span93 ft (28.3 m)
Deck width32 ft (9.9 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15 (2022)
Projected traffic16 by 2032
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed23 mi (37 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 158 ST Cty RD 12 over Deep Ck built?

It was built in 2004, making it 21 years old in 2025.

What condition is 158 ST Cty RD 12 over Deep 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 May 2023.

How much traffic does 158 ST Cty RD 12 over Deep Ck carry?

About 15 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is 158 ST Cty RD 12 over Deep Ck?

The structure is 97 ft (29.6 m) long with a longest span of 93 ft (28.3 m) and a deck 32 ft wide.

Who owns 158 ST Cty RD 12 over Deep Ck?

It is owned by the County Highway Agency.