US Bridges

Mo 185 S over Bates CR

Fair

Washington County, Missouri · S 430 T 37 N R 2 E · Structure no. 546

Built
1963
62 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
215 ft
3 main spans
Daily traffic
1,595
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 185 S over Bates CR is a steel continuous stringer/multi-beam or girder carrying Mo 185 S over Bates CR in Washington County, Missouri. It was built in 1963, so it is 62 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 1,595 vehicles a day, roughly 11% of them trucks, projected to reach 2,233 by 2044. The structure is 215 ft (65.5 m) long and 30 ft wide. If it were closed, the detour would be 44.7 mi (72 km).

Location

Open in Google Maps
CarriesMo 185 S
CrossesBates CR
LocationS 430 T 37 N R 2 E
RouteState Highway 185
CountyWashington County
StateMissouri
Coordinates37.94751, -90.80031
Functional classRural Major Collector

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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 evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41.7 US tons
Inventory rating24.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length215 ft (65.5 m)
Longest span80 ft (24.4 m)
Deck width30 ft (9.1 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,595 (2024)
Projected traffic2,233 by 2044
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed44.7 mi (72 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.5 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Mo 185 S over Bates CR built?

It was built in 1963, making it 62 years old in 2025.

What condition is Mo 185 S over Bates CR 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 June 2024.

How much traffic does Mo 185 S over Bates CR carry?

About 1,595 vehicles per day (2024 count), of which roughly 11% are trucks.

How long is Mo 185 S over Bates CR?

The structure is 215 ft (65.5 m) long with a longest span of 80 ft (24.4 m) and a deck 30 ft wide.

Who owns Mo 185 S over Bates CR?

It is owned by the State Highway Agency.