US Bridges

Mo 77 S over Lateral Dtch No 1

Fair

Scott County, Missouri · S 18 T 28 N R 14 E · Structure no. 5501

Built
1931
94 years old
Condition
Fair
inspected January 2025
Type
Slab
Concrete
Length
67 ft
3 main spans
Daily traffic
3,960
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 77 S over Lateral Dtch No 1 is a concrete slab carrying Mo 77 S over Lateral Dtch No 1 in Scott County, Missouri. It was built in 1931, so it is 94 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 3,960 vehicles a day, roughly 8% of them trucks, projected to reach 5,742 by 2044. The structure is 67 ft (20.4 m) long and 25 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

Location

Open in Google Maps
CarriesMo 77 S
CrossesLateral Dtch No 1
LocationS 18 T 28 N R 14 E
RouteState Highway 77
CountyScott County
StateMissouri
Coordinates37.09088, -89.54299
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36.7 US tons
Inventory rating21.8 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length67 ft (20.4 m)
Longest span23 ft (6.9 m)
Deck width25 ft (7.6 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,960 (2024)
Projected traffic5,742 by 2044
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 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$883,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Mo 77 S over Lateral Dtch No 1 built?

It was built in 1931, making it 94 years old in 2025.

What condition is Mo 77 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 January 2025.

How much traffic does Mo 77 S over Lateral Dtch No 1 carry?

About 3,960 vehicles per day (2024 count), of which roughly 8% are trucks.

How long is Mo 77 S over Lateral Dtch No 1?

The structure is 67 ft (20.4 m) long with a longest span of 23 ft (6.9 m) and a deck 25 ft wide.

Who owns Mo 77 S over Lateral Dtch No 1?

It is owned by the State Highway Agency.