US Bridges

28870 Co. Rd. 11 over Ck

Fair

Hutchinson County, South Dakota · 2.7S 1.5E of Olivet · Structure no. 000000034235207

Built
1993
32 years old
Condition
Fair
inspected May 2024
Type
Tee Beam
Prestressed Concrete
Length
66 ft
1 main span
Daily traffic
95
2022 count
Owner
County
County Highway Agency

About this bridge

28870 Co. Rd. 11 over Ck is a prestressed concrete tee beam carrying 28870 Co. Rd. 11 over Ck in Hutchinson County, South Dakota. It was built in 1993, so it is 32 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 95 vehicles a day, roughly 2% of them trucks, projected to reach 95 by 2032. The structure is 66 ft (20.1 m) long and 27 ft wide. If it were closed, the detour would be 13 mi (21 km).

Location

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Carries28870 Co. Rd. 11
CrossesCk
Location2.7S 1.5E of Olivet
RouteCounty Highway 0
CountyHutchinson County
StateSouth Dakota
Coordinates43.20153, -97.64863
Functional classRural Local

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating21.1 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadUnknown
Structure length66 ft (20.1 m)
Longest span61 ft (18.7 m)
Deck width27 ft (8.2 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic95 (2022)
Projected traffic95 by 2032
Trucks2%
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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$25,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 28870 Co. Rd. 11 over Ck built?

It was built in 1993, making it 32 years old in 2025.

What condition is 28870 Co. Rd. 11 over 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 28870 Co. Rd. 11 over Ck carry?

About 95 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 28870 Co. Rd. 11 over Ck?

The structure is 66 ft (20.1 m) long with a longest span of 61 ft (18.7 m) and a deck 27 ft wide.

Who owns 28870 Co. Rd. 11 over Ck?

It is owned by the County Highway Agency.