US Bridges

Mo 161 S over Elkhorn Crk

Good

Montgomery County, Missouri · S 2 T 49 N R 5 W · Structure no. 37238

Built
2024
1 years old
Condition
Good
inspected December 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
169 ft
3 main spans
Daily traffic
924
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 161 S over Elkhorn Crk is a prestressed concrete continuous box beam or girders - single or spread carrying Mo 161 S over Elkhorn Crk in Montgomery County, Missouri. It was built in 2024, so it is 1 years old, younger than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 924 vehicles a day, roughly 15% of them trucks, projected to reach 1,432 by 2044. The structure is 169 ft (51.4 m) long and 27 ft wide. If it were closed, the detour would be 21.1 mi (34 km).

CarriesMo 161 S
CrossesElkhorn Crk
LocationS 2 T 49 N R 5 W
RouteState Highway 161
Coordinates39.04506, -91.43727
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable 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 rating85.3 US tons
Inventory rating45.6 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length169 ft (51.4 m)
Longest span75 ft (22.9 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic924 (2024)
Projected traffic1,432 by 2044
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed21.1 mi (34 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 Crk built?

It was built in 2024, making it 1 years old in 2025.

What condition is Mo 161 S over Elkhorn Crk in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in December 2024.

How much traffic does Mo 161 S over Elkhorn Crk carry?

About 924 vehicles per day (2024 count), of which roughly 15% are trucks.

How long is Mo 161 S over Elkhorn Crk?

The structure is 169 ft (51.4 m) long with a longest span of 75 ft (22.9 m) and a deck 27 ft wide.

Who owns Mo 161 S over Elkhorn Crk?

It is owned by the State Highway Agency.