US Bridges

Atom DR over Br of Muddy CR

Fair

Linn County, Missouri · S 14 T 60 N R 22 W · Structure no. 12958

Built
1945
80 years old, rebuilt 1988
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
30 ft
1 main span
Daily traffic
25
2024 count
Owner
County
County Highway Agency

About this bridge

Atom DR over Br of Muddy CR is a steel stringer/multi-beam or girder carrying Atom DR over Br of Muddy CR in Linn County, Missouri. It was built in 1945 and reconstructed in 1988, so it is 80 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 25 vehicles a day, roughly 10% of them trucks, projected to reach 28 by 2044. The structure is 30 ft (9.1 m) long and 18 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesAtom DR
CrossesBr of Muddy CR
LocationS 14 T 60 N R 22 W
RouteCounty Highway 25
CountyLinn County
StateMissouri
Coordinates40.02015, -93.34288
Functional classRural Local

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.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.7 US tons
Inventory rating22.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadOther
Structure length30 ft (9.1 m)
Longest span29 ft (8.8 m)
Deck width18 ft (5.5 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2024)
Projected traffic28 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Atom DR over Br of Muddy CR built?

It was built in 1945, making it 80 years old in 2025. It was reconstructed in 1988.

What condition is Atom DR over Br of Muddy 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 Atom DR over Br of Muddy CR carry?

About 25 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Atom DR over Br of Muddy CR?

The structure is 30 ft (9.1 m) long with a longest span of 29 ft (8.8 m) and a deck 18 ft wide.

Who owns Atom DR over Br of Muddy CR?

It is owned by the County Highway Agency.