US Bridges

241st Street over Morris Ck

FairPosted for load

Sanborn County, South Dakota · 3.9W Letcher · Structure no. 000000056051210

Built
1930
95 years old, rebuilt 1966
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
32 ft
1 main span
Daily traffic
253
2022 count
Owner
County
County Highway Agency

About this bridge

241st Street over Morris Ck is a prestressed concrete stringer/multi-beam or girder carrying 241st Street over Morris Ck in Sanborn County, South Dakota. It was built in 1930 and reconstructed in 1966, so it is 95 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 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 253 vehicles a day, roughly 3% of them trucks, projected to reach 253 by 2032. The structure is 32 ft (9.8 m) long and 28 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Carries241st Street
CrossesMorris Ck
Location3.9W Letcher
RouteCounty Highway 0
Coordinates43.89456, -98.23059
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating31 US tons
Inventory rating18.6 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20 + Mod
Structure length32 ft (9.8 m)
Longest span31 ft (9.4 m)
Deck width28 ft (8.4 m)
Roadway width26 ft (7.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic253 (2022)
Projected traffic253 by 2032
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$10,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 241st Street over Morris Ck built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1966.

What condition is 241st Street over Morris 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 August 2024.

How much traffic does 241st Street over Morris Ck carry?

About 253 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is 241st Street over Morris Ck?

The structure is 32 ft (9.8 m) long with a longest span of 31 ft (9.4 m) and a deck 28 ft wide.

Who owns 241st Street over Morris Ck?

It is owned by the County Highway Agency.