US Bridges

185th Street over Foster Creek

Good

Spink County, South Dakota · 5N & 0.5E Bloomfield · Structure no. 000000058305370

Built
2015
10 years old
Condition
Good
inspected August 2023
Type
Tee Beam
Prestressed Concrete
Length
65 ft
1 main span
Daily traffic
31
2022 count
Owner
County
County Highway Agency

About this bridge

185th Street over Foster Creek is a prestressed concrete tee beam carrying 185th Street over Foster Creek in Spink 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 31 vehicles a day, roughly 3% of them trucks, projected to reach 46 by 2032. The structure is 65 ft (19.8 m) long and 29 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Carries185th Street
CrossesFoster Creek
Location5N & 0.5E Bloomfield
RouteCounty Highway 0
Coordinates44.70439, -98.08879
Functional classRural Minor 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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20 + Mod
Structure length65 ft (19.8 m)
Longest span64 ft (19.5 m)
Deck width29 ft (8.7 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic31 (2022)
Projected traffic46 by 2032
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 185th Street over Foster Creek built?

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

What condition is 185th Street over Foster 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 August 2023.

How much traffic does 185th Street over Foster Creek carry?

About 31 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is 185th Street over Foster Creek?

The structure is 65 ft (19.8 m) long with a longest span of 64 ft (19.5 m) and a deck 29 ft wide.

Who owns 185th Street over Foster Creek?

It is owned by the County Highway Agency.