US Bridges

Rt Mm S over Lateral Dtch No 1

FairPosted for load

Dunklin County, Missouri · S 7 T 22 N R 9 E · Structure no. 7128

Built
1958
67 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
121 ft
3 main spans
Daily traffic
651
2024 count
Owner
State
State Highway Agency

About this bridge

Rt Mm S over Lateral Dtch No 1 is a steel stringer/multi-beam or girder carrying Rt Mm S over Lateral Dtch No 1 in Dunklin County, Missouri. It was built in 1958, so it is 67 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 121 ft (36.9 m) long and 22 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

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CarriesRt Mm S
CrossesLateral Dtch No 1
LocationS 7 T 22 N R 9 E
RouteState Highway 0MM
CountyDunklin County
StateMissouri
Coordinates36.56979, -90.0296
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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 evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating23.8 US tons
Inventory rating10.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadH 10
Structure length121 ft (36.9 m)
Longest span51 ft (15.6 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.3 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Rt Mm S over Lateral Dtch No 1 built?

It was built in 1958, making it 67 years old in 2025.

What condition is Rt Mm S over Lateral Dtch No 1 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 Lateral Dtch No 1 carry?

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

How long is Rt Mm S over Lateral Dtch No 1?

The structure is 121 ft (36.9 m) long with a longest span of 51 ft (15.6 m) and a deck 22 ft wide.

Who owns Rt Mm S over Lateral Dtch No 1?

It is owned by the State Highway Agency.