US Bridges

SD046 over East Fork Frog Ck

Fair

Clay County, South Dakota · 2.5 E JCT Sd 19 N · Structure no. 000000014065000

Built
1983
42 years old
Condition
Fair
inspected October 2024
Type
Culvert
Concrete Continuous
Length
22 ft
2 main spans
Daily traffic
2,559
2024 count
Owner
State
State Highway Agency

About this bridge

SD046 over East Fork Frog Ck is a concrete continuous culvert carrying SD046 over East Fork Frog Ck in Clay County, South Dakota. It was built in 1983, so it is 42 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 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 2,559 vehicles a day, roughly 21% of them trucks, projected to reach 4,199 by 2044. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 3.7 mi (6 km).

CarriesSD046
CrossesEast Fork Frog Ck
Location2.5 E JCT Sd 19 N
RouteState Highway 46
Coordinates43.08348, -97.03174
Functional classRural 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 protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 48 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 alignment8: Equal to present desirable criteria
Operating rating89.5 US tons
Inventory rating53.6 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length22 ft (6.7 m)
Longest span10 ft (3.2 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,559 (2024)
Projected traffic4,199 by 2044
Trucks21%
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

OwnerState Highway Agency
Maintained byState 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 SD046 over East Fork Frog Ck built?

It was built in 1983, making it 42 years old in 2025.

What condition is SD046 over East Fork Frog Ck 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 October 2024.

How much traffic does SD046 over East Fork Frog Ck carry?

About 2,559 vehicles per day (2024 count), of which roughly 21% are trucks.

How long is SD046 over East Fork Frog Ck?

The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3.2 m).

Who owns SD046 over East Fork Frog Ck?

It is owned by the State Highway Agency.