US Bridges

106th Street over Spring Creek

Good

Campbell County, South Dakota · 1.5 N & 6.1 E of Herreid · Structure no. 000000011261060

Built
2015
10 years old
Condition
Good
inspected September 2024
Type
Slab
Concrete Continuous
Length
127 ft
3 main spans
Daily traffic
110
2022 count
Owner
County
County Highway Agency

About this bridge

106th Street over Spring Creek is a concrete continuous slab carrying 106th Street over Spring Creek in Campbell County, South Dakota. It was built in 2015, so it is 10 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 110 vehicles a day, roughly 5% of them trucks, projected to reach 165 by 2032. The structure is 127 ft (38.7 m) long and 33 ft wide. If it were closed, the detour would be 13 mi (21 km).

Carries106th Street
CrossesSpring Creek
Location1.5 N & 6.1 E of Herreid
RouteCounty Highway 6478
Coordinates45.85441, -99.94001
Functional classRural Major Collector

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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating58.4 US tons
Inventory rating45.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length127 ft (38.7 m)
Longest span48 ft (14.6 m)
Deck width33 ft (10 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic110 (2022)
Projected traffic165 by 2032
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 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 106th Street over Spring Creek built?

It was built in 2015, making it 10 years old in 2025.

What condition is 106th Street over Spring Creek 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 September 2024.

How much traffic does 106th Street over Spring Creek carry?

About 110 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is 106th Street over Spring Creek?

The structure is 127 ft (38.7 m) long with a longest span of 48 ft (14.6 m) and a deck 33 ft wide.

Who owns 106th Street over Spring Creek?

It is owned by the County Highway Agency.