US Bridges

Mahin RD over Long Br of Muddy C

FairPosted for load

Pettis County, Missouri · S 33 T 46 N R 23 W · Structure no. 23505

Built
1940
85 years old
Condition
Fair
inspected February 2024
Type
Truss - Thru
Steel
Length
60 ft
1 main span
Daily traffic
30
2024 count
Owner
County
County Highway Agency

About this bridge

Mahin RD over Long Br of Muddy C is a steel truss - thru carrying Mahin RD over Long Br of Muddy C in Pettis County, Missouri. It was built in 1940, so it is 85 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. Its operating status is: posted for load restriction.

It carries about 30 vehicles a day, roughly 10% of them trucks, projected to reach 51 by 2044. The structure is 60 ft (18.3 m) long and 16 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesMahin RD
CrossesLong Br of Muddy C
LocationS 33 T 46 N R 23 W
RouteCounty Highway 411
CountyPettis County
StateMissouri
Coordinates38.72782, -93.44784
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating15.9 US tons
Inventory rating9.9 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadOther
Structure length60 ft (18.3 m)
Longest span60 ft (18.3 m)
Deck width16 ft (4.8 m)
Roadway width15 ft (4.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2024)
Projected traffic51 by 2044
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$455,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Mahin RD over Long Br of Muddy C built?

It was built in 1940, making it 85 years old in 2025.

What condition is Mahin RD over Long Br of Muddy C 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 February 2024.

How much traffic does Mahin RD over Long Br of Muddy C carry?

About 30 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Mahin RD over Long Br of Muddy C?

The structure is 60 ft (18.3 m) long with a longest span of 60 ft (18.3 m) and a deck 16 ft wide.

Who owns Mahin RD over Long Br of Muddy C?

It is owned by the County Highway Agency.