US Bridges

140th Street over Mud Creek

Good

Brown County, South Dakota · 2N & 4.7E of Ferney · Structure no. 000000007347400

Built
2021
4 years old
Condition
Good
inspected September 2024
Type
Tee Beam
Prestressed Concrete
Length
50 ft
1 main span
Daily traffic
98
2022 count
Owner
County
County Highway Agency

About this bridge

140th Street over Mud Creek is a prestressed concrete tee beam carrying 140th Street over Mud Creek in Brown County, South Dakota. It was built in 2021, so it is 4 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 98 vehicles a day, roughly 2% of them trucks, projected to reach 98 by 2032. The structure is 50 ft (15.2 m) long and 31 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Carries140th Street
CrossesMud Creek
Location2N & 4.7E of Ferney
Coordinates45.35631, -98.00798
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37 US tons
Inventory rating27 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadUnknown
Structure length50 ft (15.2 m)
Longest span47 ft (14.2 m)
Deck width31 ft (9.4 m)
Roadway width29 ft (8.8 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 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 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 2021, making it 4 years old in 2025.

What condition is 140th Street over Mud 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 September 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 50 ft (15.2 m) long with a longest span of 47 ft (14.2 m) and a deck 31 ft wide.

Who owns 140th Street over Mud Creek?

It is owned by the County Highway Agency.