US Bridges

Rt Mm S over Main Dtch

FairPosted for load

Dunklin County, Missouri · S 19 T 23 N R 9 E · Structure no. 8142

Built
1962
63 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
151 ft
3 main spans
Daily traffic
651
2024 count
Owner
State
State Highway Agency

About this bridge

Rt Mm S over Main Dtch is a steel continuous stringer/multi-beam or girder carrying Rt Mm S over Main Dtch in Dunklin County, Missouri. It was built in 1962, so it is 63 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 651 vehicles a day, roughly 11% of them trucks, projected to reach 911 by 2044. The structure is 151 ft (46 m) long and 22 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

Open in Google Maps
CarriesRt Mm S
CrossesMain Dtch
LocationS 19 T 23 N R 9 E
RouteState Highway 0MM
CountyDunklin County
StateMissouri
Coordinates36.62186, -90.02857
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating27.8 US tons
Inventory rating14.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length151 ft (46 m)
Longest span58 ft (17.7 m)
Deck width22 ft (6.8 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic651 (2024)
Projected traffic911 by 2044
Trucks11%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.1 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Rt Mm S over Main Dtch built?

It was built in 1962, making it 63 years old in 2025.

What condition is Rt Mm S over Main Dtch 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 November 2024.

How much traffic does Rt Mm S over Main Dtch carry?

About 651 vehicles per day (2024 count), of which roughly 11% are trucks.

How long is Rt Mm S over Main Dtch?

The structure is 151 ft (46 m) long with a longest span of 58 ft (17.7 m) and a deck 22 ft wide.

Who owns Rt Mm S over Main Dtch?

It is owned by the State Highway Agency.