US Bridges

Mo 185 S over Bourbeuse Rvr

Fair

Franklin County, Missouri · S 7 T 42 N R 2 W · Structure no. 1897

Built
1975
50 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
2,190 ft
19 main spans
Daily traffic
1,618
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 185 S over Bourbeuse Rvr is a steel continuous stringer/multi-beam or girder carrying Mo 185 S over Bourbeuse Rvr in Franklin 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 5 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 1,618 vehicles a day, roughly 17% of them trucks, projected to reach 3,074 by 2044. The structure is 2,190 ft (667.5 m) long and 43 ft wide. If it were closed, the detour would be 26.1 mi (42 km).

Location

Open in Google Maps
CarriesMo 185 S
CrossesBourbeuse Rvr
LocationS 7 T 42 N R 2 W
RouteState Highway 185
CountyFranklin County
StateMissouri
Coordinates38.39616, -91.18634
Functional classRural Minor Arterial

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating29.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans19 (+2 approach)
Design loadH 20
Structure length2,190 ft (667.5 m)
Longest span112 ft (34.1 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,618 (2024)
Projected traffic3,074 by 2044
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed26.1 mi (42 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Mo 185 S over Bourbeuse Rvr built?

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

What condition is Mo 185 S over Bourbeuse 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 July 2024.

How much traffic does Mo 185 S over Bourbeuse Rvr carry?

About 1,618 vehicles per day (2024 count), of which roughly 17% are trucks.

How long is Mo 185 S over Bourbeuse Rvr?

The structure is 2,190 ft (667.5 m) long with a longest span of 112 ft (34.1 m) and a deck 43 ft wide.

Who owns Mo 185 S over Bourbeuse Rvr?

It is owned by the State Highway Agency.