US Bridges

140th Street over Mud Creek

Fair

Brown County, South Dakota · 2N & 2.7W of Ferney · Structure no. 000000007273400

Built
1990
35 years old
Condition
Fair
inspected July 2024
Type
Slab
Concrete Continuous
Length
68 ft
3 main spans
Daily traffic
98
2022 count
Owner
County
County Highway Agency

About this bridge

140th Street over Mud Creek is a concrete continuous slab carrying 140th Street over Mud Creek in Brown County, South Dakota. It was built in 1990, so it is 35 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 98 vehicles a day, roughly 2% of them trucks, projected to reach 98 by 2032. The structure is 68 ft (20.7 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Carries140th Street
CrossesMud Creek
Location2N & 2.7W of Ferney
Coordinates45.35661, -98.15944
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating48.4 US tons
Inventory rating37.3 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length68 ft (20.7 m)
Longest span26 ft (7.8 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic98 (2022)
Projected traffic98 by 2032
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 140th Street over Mud Creek built?

It was built in 1990, making it 35 years old in 2025.

What condition is 140th Street over Mud Creek 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 140th Street over Mud Creek carry?

About 98 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is 140th Street over Mud Creek?

The structure is 68 ft (20.7 m) long with a longest span of 26 ft (7.8 m) and a deck 32 ft wide.

Who owns 140th Street over Mud Creek?

It is owned by the County Highway Agency.