US Bridges

Mo 5 S over Niangua Arm Lake O

Fair

Camden County, Missouri · S 28 T 39 N R 17 W · Structure no. 12059

Built
2000
25 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
2,005 ft
10 main spans
Daily traffic
10,940
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 5 S over Niangua Arm Lake O is a steel continuous stringer/multi-beam or girder carrying Mo 5 S over Niangua Arm Lake O in Camden County, Missouri. It was built in 2000, so it is 25 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 10,940 vehicles a day, roughly 13% of them trucks, projected to reach 19,145 by 2044. The structure is 2,005 ft (611.1 m) long and 45 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

Open in Google Maps
CarriesMo 5 S
CrossesNiangua Arm Lake O
LocationS 28 T 39 N R 17 W
RouteState Highway 5
CountyCamden County
StateMissouri
Coordinates38.08367, -92.8039
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure9 ExcellentNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 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 adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating67.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans10
Design loadHS 25 or greater
Structure length2,005 ft (611.1 m)
Longest span200 ft (61.1 m)
Deck width45 ft (13.7 m)
Roadway width43 ft (13.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,940 (2024)
Projected traffic19,145 by 2044
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 km)
TollOn a free road
National Highway SystemYes

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 5 S over Niangua Arm Lake O built?

It was built in 2000, making it 25 years old in 2025.

What condition is Mo 5 S over Niangua Arm Lake O 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 August 2024.

How much traffic does Mo 5 S over Niangua Arm Lake O carry?

About 10,940 vehicles per day (2024 count), of which roughly 13% are trucks.

How long is Mo 5 S over Niangua Arm Lake O?

The structure is 2,005 ft (611.1 m) long with a longest span of 200 ft (61.1 m) and a deck 45 ft wide.

Who owns Mo 5 S over Niangua Arm Lake O?

It is owned by the State Highway Agency.