US Bridges

Mo 161 S over Coon CR

Fair

Montgomery County, Missouri · S 12 T 50 N R 5 W · Structure no. 1038

Built
1963
62 years old, rebuilt 2014
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
160 ft
3 main spans
Daily traffic
845
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 161 S over Coon CR is a steel continuous stringer/multi-beam or girder carrying Mo 161 S over Coon CR in Montgomery County, Missouri. It was built in 1963 and reconstructed in 2014, 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 845 vehicles a day, roughly 12% of them trucks, projected to reach 1,310 by 2044. The structure is 160 ft (48.8 m) long and 31 ft wide. If it were closed, the detour would be 24.9 mi (40 km).

Location

Open in Google Maps
CarriesMo 161 S
CrossesCoon CR
LocationS 12 T 50 N R 5 W
RouteState Highway 161
CountyMontgomery County
StateMissouri
Coordinates39.12548, -91.41554
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
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating32.7 US tons
Inventory rating19.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length160 ft (48.8 m)
Longest span60 ft (18.2 m)
Deck width31 ft (9.3 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic845 (2024)
Projected traffic1,310 by 2044
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.9 mi (40 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 161 S over Coon CR built?

It was built in 1963, making it 62 years old in 2025. It was reconstructed in 2014.

What condition is Mo 161 S over Coon 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 September 2024.

How much traffic does Mo 161 S over Coon CR carry?

About 845 vehicles per day (2024 count), of which roughly 12% are trucks.

How long is Mo 161 S over Coon CR?

The structure is 160 ft (48.8 m) long with a longest span of 60 ft (18.2 m) and a deck 31 ft wide.

Who owns Mo 161 S over Coon CR?

It is owned by the State Highway Agency.