US Bridges

SD042 over West Fork Vermillion Rv

Good

McCook County, South Dakota · 1.7 E JCT US 81 · Structure no. 000000044128210

Built
1983
42 years old
Condition
Good
inspected June 2023
Type
Slab
Concrete Continuous
Length
99 ft
3 main spans
Daily traffic
1,614
2024 count
Owner
State
State Highway Agency

About this bridge

SD042 over West Fork Vermillion Rv is a concrete continuous slab carrying SD042 over West Fork Vermillion Rv in McCook 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 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 1,614 vehicles a day, roughly 13% of them trucks, projected to reach 2,416 by 2044. The structure is 99 ft (30.3 m) long and 39 ft wide. If it were closed, the detour would be 16.8 mi (27 km).

CarriesSD042
CrossesWest Fork Vermillion Rv
Location1.7 E JCT US 81
RouteState Highway 42
Coordinates43.54344, -97.3538
Functional classRural Minor Arterial

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 protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83.3 US tons
Inventory rating49.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length99 ft (30.3 m)
Longest span35 ft (10.8 m)
Deck width39 ft (11.8 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,614 (2024)
Projected traffic2,416 by 2044
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.8 mi (27 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 SD042 over West Fork Vermillion Rv built?

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

What condition is SD042 over West Fork Vermillion Rv 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 June 2023.

How much traffic does SD042 over West Fork Vermillion Rv carry?

About 1,614 vehicles per day (2024 count), of which roughly 13% are trucks.

How long is SD042 over West Fork Vermillion Rv?

The structure is 99 ft (30.3 m) long with a longest span of 35 ft (10.8 m) and a deck 39 ft wide.

Who owns SD042 over West Fork Vermillion Rv?

It is owned by the State Highway Agency.