US Bridges

Mo 161 S over Elkhorn CR

Fair

Montgomery County, Missouri · S 28 T 49 N R 5 W · Structure no. 34017

Built
2012
13 years old
Condition
Fair
inspected September 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
116 ft
3 main spans
Daily traffic
1,386
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 161 S over Elkhorn CR is a prestressed concrete box beam or girders - single or spread carrying Mo 161 S over Elkhorn CR in Montgomery County, Missouri. It was built in 2012, so it is 13 years old, younger 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 1,386 vehicles a day, roughly 12% of them trucks, projected to reach 2,148 by 2044. The structure is 116 ft (35.3 m) long and 26 ft wide. If it were closed, the detour would be 26.1 mi (42 km).

Location

Open in Google Maps
CarriesMo 161 S
CrossesElkhorn CR
LocationS 28 T 49 N R 5 W
RouteState Highway 161
CountyMontgomery County
StateMissouri
Coordinates38.98076, -91.47577
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.
Superstructure7 GoodSome minor problems.
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 evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81.4 US tons
Inventory rating48.6 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length116 ft (35.3 m)
Longest span45 ft (13.7 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,386 (2024)
Projected traffic2,148 by 2044
Trucks12%
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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Mo 161 S over Elkhorn CR built?

It was built in 2012, making it 13 years old in 2025.

What condition is Mo 161 S over Elkhorn 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 Elkhorn CR carry?

About 1,386 vehicles per day (2024 count), of which roughly 12% are trucks.

How long is Mo 161 S over Elkhorn CR?

The structure is 116 ft (35.3 m) long with a longest span of 45 ft (13.7 m) and a deck 26 ft wide.

Who owns Mo 161 S over Elkhorn CR?

It is owned by the State Highway Agency.