US Bridges

SD045 over South Fork Snake Ck

Fair

Faulk County, South Dakota · 1 N JCT US 212 · Structure no. 000000025270136

Built
1975
50 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
155 ft
3 main spans
Daily traffic
855
2024 count
Owner
State
State Highway Agency

About this bridge

SD045 over South Fork Snake Ck is a steel continuous stringer/multi-beam or girder carrying SD045 over South Fork Snake Ck in Faulk County, South Dakota. It was built in 1975, so it is 50 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 855 vehicles a day, roughly 26% of them trucks, projected to reach 1,235 by 2044. The structure is 155 ft (47.2 m) long and 43 ft wide. If it were closed, the detour would be 70.8 mi (114 km).

CarriesSD045
CrossesSouth Fork Snake Ck
Location1 N JCT US 212
RouteState Highway 45
Coordinates45.04739, -99.02209
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating58.8 US tons
Inventory rating35.1 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length155 ft (47.2 m)
Longest span59 ft (18 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic855 (2024)
Projected traffic1,235 by 2044
Trucks26%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed70.8 mi (114 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 SD045 over South Fork Snake Ck built?

It was built in 1975, making it 50 years old in 2025.

What condition is SD045 over South Fork Snake 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 May 2024.

How much traffic does SD045 over South Fork Snake Ck carry?

About 855 vehicles per day (2024 count), of which roughly 26% are trucks.

How long is SD045 over South Fork Snake Ck?

The structure is 155 ft (47.2 m) long with a longest span of 59 ft (18 m) and a deck 43 ft wide.

Who owns SD045 over South Fork Snake Ck?

It is owned by the State Highway Agency.