US Bridges

Mo 11 S over Br New Boston CR

Fair

Linn County, Missouri · S 3 T 59 N R 18 W · Structure no. 3222

Built
1979
46 years old
Condition
Fair
inspected December 2024
Type
Culvert
Concrete Continuous
Length
24 ft
2 main spans
Daily traffic
264
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 11 S over Br New Boston CR is a concrete continuous culvert carrying Mo 11 S over Br New Boston CR in Linn County, Missouri. It was built in 1979, so it is 46 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 264 vehicles a day, roughly 12% of them trucks, projected to reach 330 by 2044. The structure is 24 ft (7.3 m) long. If it were closed, the detour would be 14.3 mi (23 km).

CarriesMo 11 S
CrossesBr New Boston CR
LocationS 3 T 59 N R 18 W
RouteState Highway 11
Coordinates39.95214, -92.89276
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.

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadH 15
Structure length24 ft (7.3 m)
Longest span11 ft (3.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic264 (2024)
Projected traffic330 by 2044
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 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 Br New Boston CR built?

It was built in 1979, making it 46 years old in 2025.

What condition is Mo 11 S over Br New Boston CR 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 December 2024.

How much traffic does Mo 11 S over Br New Boston CR carry?

About 264 vehicles per day (2024 count), of which roughly 12% are trucks.

How long is Mo 11 S over Br New Boston CR?

The structure is 24 ft (7.3 m) long with a longest span of 11 ft (3.4 m).

Who owns Mo 11 S over Br New Boston CR?

It is owned by the State Highway Agency.