US Bridges

NW Mud RD over Sloan Br

Good

Clinton County, Missouri · S 29 T 56 N R 32 W · Structure no. 31819

Built
2007
18 years old
Condition
Good
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
63 ft
1 main span
Daily traffic
10
2023 count
Owner
County
County Highway Agency

About this bridge

NW Mud RD over Sloan Br is a steel stringer/multi-beam or girder carrying NW Mud RD over Sloan Br in Clinton County, Missouri. It was built in 2007, so it is 18 years old, younger than the Missouri average of 45.1 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 10 vehicles a day, roughly 10% of them trucks, projected to reach 12 by 2043. The structure is 63 ft (19.2 m) long and 27 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesNW Mud RD
CrossesSloan Br
LocationS 29 T 56 N R 32 W
RouteCounty Highway 357
Coordinates39.63467, -94.51734
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 inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating72.4 US tons
Inventory rating43.7 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length63 ft (19.2 m)
Longest span60 ft (18.3 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2023)
Projected traffic12 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was NW Mud RD over Sloan Br built?

It was built in 2007, making it 18 years old in 2025.

What condition is NW Mud RD over Sloan Br 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 December 2024.

How much traffic does NW Mud RD over Sloan Br carry?

About 10 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is NW Mud RD over Sloan Br?

The structure is 63 ft (19.2 m) long with a longest span of 60 ft (18.3 m) and a deck 27 ft wide.

Who owns NW Mud RD over Sloan Br?

It is owned by the County Highway Agency.