US Bridges

County RD 353 over S Fk of Salt Rvr

Fair

Audrain County, Missouri · S 26 T 52 N R 9 W · Structure no. 18896

Built
1975
50 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
152 ft
2 main spans
Daily traffic
100
2023 count
Owner
County
County Highway Agency

About this bridge

County RD 353 over S Fk of Salt Rvr is a steel stringer/multi-beam or girder carrying County RD 353 over S Fk of Salt Rvr in Audrain County, Missouri. It was built in 1975, so it is 50 years old, older than the Missouri average of 45.1 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 100 vehicles a day, roughly 10% of them trucks, projected to reach 125 by 2043. The structure is 152 ft (46.3 m) long and 21 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesCounty RD 353
CrossesS Fk of Salt Rvr
LocationS 26 T 52 N R 9 W
RouteCounty Highway 203
CountyAudrain County
StateMissouri
Coordinates39.25739, -91.87681
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating33.7 US tons
Inventory rating24.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadOther
Structure length152 ft (46.3 m)
Longest span76 ft (23.2 m)
Deck width21 ft (6.5 m)
Roadway width20 ft (6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2023)
Projected traffic125 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 County RD 353 over S Fk of Salt Rvr built?

It was built in 1975, making it 50 years old in 2025.

What condition is County RD 353 over S Fk of Salt Rvr 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 April 2023.

How much traffic does County RD 353 over S Fk of Salt Rvr carry?

About 100 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is County RD 353 over S Fk of Salt Rvr?

The structure is 152 ft (46.3 m) long with a longest span of 76 ft (23.2 m) and a deck 21 ft wide.

Who owns County RD 353 over S Fk of Salt Rvr?

It is owned by the County Highway Agency.