Mo 11 S over Long Br Ovrfl

Fair

Linn County, Missouri · S 5 T 57 N R 19 W · Structure no. 1739

Built: 1968; 57 years old
Condition: Fair; inspected September 2024
Type: Slab; Concrete Continuous
Length: 158 ft; 3 main spans
Daily traffic: 977; 2024 count
Owner: State; State Highway Agency

About this bridge

Mo 11 S over Long Br Ovrfl is a concrete continuous slab carrying Mo 11 S over Long Br Ovrfl in Linn County, Missouri. It was built in 1968, so it is 57 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 5 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 977 vehicles a day, roughly 10% of them trucks, projected to reach 1,221 by 2044. The structure is 158 ft (48.2 m) long and 41 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

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CarriesMo 11 S

CrossesLong Br Ovrfl

LocationS 5 T 57 N R 19 W

RouteState Highway 11

CountyLinn County

StateMissouri

Coordinates39.7955, -93.06254

Functional classRural Major Collector

Condition and inspection

Fair

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

Component	Rating	Meaning
Deck	6 Satisfactory	Structural elements show some minor deterioration.
Superstructure	6 Satisfactory	Structural elements show some minor deterioration.
Substructure	5 Fair	All primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection	6 Satisfactory	Structural elements show some minor deterioration.

Last inspectionSeptember 2024

Inspection intervalevery 24 months

Operating statusOpen, no restriction

ScourFoundations stable; scour above top of footing

Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is

Deck geometry7: Better than present minimum criteria

Waterway adequacy8: Equal to present desirable criteria

Approach roadway alignment8: Equal to present desirable criteria

Operating rating44.6 US tons

Inventory rating24.8 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans3

Design loadH 20

Structure length158 ft (48.2 m)

Longest span61 ft (18.6 m)

Deck width41 ft (12.4 m)

Roadway width38 ft (11.6 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic977 (2024)

Projected traffic1,221 by 2044

Trucks10%

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway

CrossesRelief for waterway

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 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 11 S over Long Br Ovrfl built?

It was built in 1968, making it 57 years old in 2025.

What condition is Mo 11 S over Long Br Ovrfl 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 11 S over Long Br Ovrfl carry?

About 977 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Mo 11 S over Long Br Ovrfl?

The structure is 158 ft (48.2 m) long with a longest span of 61 ft (18.6 m) and a deck 41 ft wide.

Who owns Mo 11 S over Long Br Ovrfl?

It is owned by the State Highway Agency.