US Bridges

188th Street over Lake Marsh Inlet

Fair

Hamlin County, South Dakota · 3.8W of Hayti · Structure no. 000000029102100

Built
1941
84 years old
Condition
Fair
inspected July 2024
Type
Culvert
Concrete Continuous
Length
26 ft
2 main spans
Daily traffic
261
2022 count
Owner
County
County Highway Agency

About this bridge

188th Street over Lake Marsh Inlet is a concrete continuous culvert carrying 188th Street over Lake Marsh Inlet in Hamlin County, South Dakota. It was built in 1941, so it is 84 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 5 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 261 vehicles a day, roughly 2% of them trucks, projected to reach 261 by 2032. The structure is 26 ft (7.9 m) long and 29 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Carries188th Street
CrossesLake Marsh Inlet
Location3.8W of Hayti
RouteCounty Highway 0
Coordinates44.65905, -97.28437
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadH 15
Structure length26 ft (7.9 m)
Longest span10 ft (3 m)
Deck width29 ft (8.8 m)
Roadway width29 ft (8.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic261 (2022)
Projected traffic261 by 2032
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 188th Street over Lake Marsh Inlet built?

It was built in 1941, making it 84 years old in 2025.

What condition is 188th Street over Lake Marsh Inlet 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 July 2024.

How much traffic does 188th Street over Lake Marsh Inlet carry?

About 261 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 188th Street over Lake Marsh Inlet?

The structure is 26 ft (7.9 m) long with a longest span of 10 ft (3 m) and a deck 29 ft wide.

Who owns 188th Street over Lake Marsh Inlet?

It is owned by the County Highway Agency.