US Bridges

Mo 161 S over Is 70

Good

Montgomery County, Missouri · S 25 T 48 N R 6 W · Structure no. 35771

Built
2018
7 years old
Condition
Good
inspected September 2024
Type
Tee Beam
Prestressed Concrete
Length
228 ft
4 main spans
Daily traffic
2,752
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 161 S over Is 70 is a prestressed concrete tee beam carrying Mo 161 S over Is 70 in Montgomery County, Missouri. It was built in 2018, so it is 7 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,752 vehicles a day, roughly 12% of them trucks, projected to reach 4,266 by 2044. The structure is 228 ft (69.5 m) long and 47 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

CarriesMo 161 S
CrossesIs 70
LocationS 25 T 48 N R 6 W
RouteState Highway 161
Coordinates38.90747, -91.5408
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
Deck7 GoodSome minor problems.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.6 US tons
Inventory rating32.7 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHL 93
Structure length228 ft (69.5 m)
Longest span67 ft (20.4 m)
Deck width47 ft (14.2 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,752 (2024)
Projected traffic4,266 by 2044
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed11.2 mi (18 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Mo 161 S over Is 70 built?

It was built in 2018, making it 7 years old in 2025.

What condition is Mo 161 S over Is 70 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 September 2024.

How much traffic does Mo 161 S over Is 70 carry?

About 2,752 vehicles per day (2024 count), of which roughly 12% are trucks.

How long is Mo 161 S over Is 70?

The structure is 228 ft (69.5 m) long with a longest span of 67 ft (20.4 m) and a deck 47 ft wide.

Who owns Mo 161 S over Is 70?

It is owned by the State Highway Agency.