US Bridges

46030 312 St. over Clay Ck Ditch

Good

Clay County, South Dakota · 15S & 8.3E Irene · Structure no. 000000014083150

Built
1996
29 years old
Condition
Good
inspected August 2024
Type
Slab
Concrete Continuous
Length
93 ft
3 main spans
Daily traffic
25
2022 count
Owner
County
County Highway Agency

About this bridge

46030 312 St. over Clay Ck Ditch is a concrete continuous slab carrying 46030 312 St. over Clay Ck Ditch in Clay County, South Dakota. It was built in 1996, so it is 29 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 97 by 2032. The structure is 93 ft (28.3 m) long and 29 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Carries46030 312 St.
CrossesClay Ck Ditch
Location15S & 8.3E Irene
RouteCounty Highway 0
Coordinates42.86649, -96.99664
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 protection8 Very GoodNo problems noted.
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 geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating70.4 US tons
Inventory rating42.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length93 ft (28.3 m)
Longest span35 ft (10.6 m)
Deck width29 ft (8.7 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2022)
Projected traffic97 by 2032
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$25,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 46030 312 St. over Clay Ck Ditch built?

It was built in 1996, making it 29 years old in 2025.

What condition is 46030 312 St. over Clay Ck Ditch 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 46030 312 St. over Clay Ck Ditch carry?

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

How long is 46030 312 St. over Clay Ck Ditch?

The structure is 93 ft (28.3 m) long with a longest span of 35 ft (10.6 m) and a deck 29 ft wide.

Who owns 46030 312 St. over Clay Ck Ditch?

It is owned by the County Highway Agency.