US Bridges

US 61 S over Salt Rvr

Good

Ralls County, Missouri · S 36 T 56 N R 5 W · Structure no. 3228

Built
1983
42 years old
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
511 ft
3 main spans
Daily traffic
9,033
2024 count
Owner
State
State Highway Agency

About this bridge

US 61 S over Salt Rvr is a steel continuous stringer/multi-beam or girder carrying US 61 S over Salt Rvr in Ralls County, Missouri. It was built in 1983, so it is 42 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 9,033 vehicles a day, roughly 30% of them trucks, projected to reach 17,163 by 2044. The structure is 511 ft (155.8 m) long and 42 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesUS 61 S
CrossesSalt Rvr
LocationS 36 T 56 N R 5 W
RouteU.S. Route 61
Coordinates39.61183, -91.40761
Functional classRural Principal Arterial - Other

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.5 US tons
Inventory rating40.7 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+2 approach)
Design loadHS 20 + Mod
Structure length511 ft (155.8 m)
Longest span160 ft (48.8 m)
Deck width42 ft (12.8 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,033 (2024)
Projected traffic17,163 by 2044
Trucks30%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 US 61 S over Salt Rvr built?

It was built in 1983, making it 42 years old in 2025.

What condition is US 61 S over Salt Rvr 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 June 2024.

How much traffic does US 61 S over Salt Rvr carry?

About 9,033 vehicles per day (2024 count), of which roughly 30% are trucks.

How long is US 61 S over Salt Rvr?

The structure is 511 ft (155.8 m) long with a longest span of 160 ft (48.8 m) and a deck 42 ft wide.

Who owns US 61 S over Salt Rvr?

It is owned by the State Highway Agency.