US Bridges

Mo 77 S over Lateral Dtch #7

FairPosted for load

Mississippi County, Missouri · S 34 T 24 N R 17 E · Structure no. 9193

Built
1936
89 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
44 ft
1 main span
Daily traffic
311
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 77 S over Lateral Dtch #7 is a steel stringer/multi-beam or girder carrying Mo 77 S over Lateral Dtch #7 in Mississippi County, Missouri. It was built in 1936, so it is 89 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 311 vehicles a day, roughly 29% of them trucks, projected to reach 435 by 2044. The structure is 44 ft (13.4 m) long and 21 ft wide. If it were closed, the detour would be 19.3 mi (31 km).

Location

Open in Google Maps
CarriesMo 77 S
CrossesLateral Dtch #7
LocationS 34 T 24 N R 17 E
RouteState Highway 77
CountyMississippi County
StateMissouri
Coordinates36.68633, -89.21035
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating19.8 US tons
Inventory rating9.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 10
Structure length44 ft (13.4 m)
Longest span41 ft (12.5 m)
Deck width21 ft (6.5 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic311 (2024)
Projected traffic435 by 2044
Trucks29%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.3 mi (31 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$515,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Mo 77 S over Lateral Dtch #7 built?

It was built in 1936, making it 89 years old in 2025.

What condition is Mo 77 S over Lateral Dtch #7 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 Mo 77 S over Lateral Dtch #7 carry?

About 311 vehicles per day (2024 count), of which roughly 29% are trucks.

How long is Mo 77 S over Lateral Dtch #7?

The structure is 44 ft (13.4 m) long with a longest span of 41 ft (12.5 m) and a deck 21 ft wide.

Who owns Mo 77 S over Lateral Dtch #7?

It is owned by the State Highway Agency.