US Bridges

Mo 161 S over Two Mile Br

Fair

Montgomery County, Missouri · S 14 T 49 N R 5 W · Structure no. 9521

Built
1938
87 years old
Condition
Fair
inspected September 2024
Type
Culvert
Concrete Continuous
Length
25 ft
2 main spans
Daily traffic
924
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 161 S over Two Mile Br is a concrete continuous culvert carrying Mo 161 S over Two Mile Br in Montgomery County, Missouri. It was built in 1938, so it is 87 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 924 vehicles a day, roughly 15% of them trucks, projected to reach 1,432 by 2044. The structure is 25 ft (7.6 m) long and 29 ft wide. If it were closed, the detour would be 21.1 mi (34 km).

Location

Open in Google Maps
CarriesMo 161 S
CrossesTwo Mile Br
LocationS 14 T 49 N R 5 W
RouteState Highway 161
CountyMontgomery County
StateMissouri
Coordinates39.01783, -91.43944
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42.7 US tons
Inventory rating25.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadH 10
Structure length25 ft (7.6 m)
Longest span10 ft (3 m)
Deck width29 ft (8.7 m)
Roadway width27 ft (8.1 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 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 Two Mile Br built?

It was built in 1938, making it 87 years old in 2025.

What condition is Mo 161 S over Two Mile Br 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 Two Mile Br carry?

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

How long is Mo 161 S over Two Mile Br?

The structure is 25 ft (7.6 m) long with a longest span of 10 ft (3 m) and a deck 29 ft wide.

Who owns Mo 161 S over Two Mile Br?

It is owned by the State Highway Agency.