US Bridges

Mo 77 S over Drain Dtch No 1

Poor

Scott County, Missouri · S 7 T 29 N R 13 E · Structure no. 5372

Built
1930
95 years old, rebuilt 1973
Condition
Poor
inspected February 2025
Type
Tee Beam
Concrete
Length
88 ft
3 main spans
Daily traffic
4,733
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 77 S over Drain Dtch No 1 is a concrete tee beam carrying Mo 77 S over Drain Dtch No 1 in Scott County, Missouri. It was built in 1930 and reconstructed in 1973, so it is 95 years old, older than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 4,733 vehicles a day, roughly 6% of them trucks, projected to reach 6,863 by 2044. The structure is 88 ft (26.8 m) long and 30 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesMo 77 S
CrossesDrain Dtch No 1
LocationS 7 T 29 N R 13 E
RouteState Highway 77
Coordinates37.19046, -89.66737
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
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 inspectionFebruary 2025
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.6 US tons
Inventory rating31.7 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length88 ft (26.8 m)
Longest span32 ft (9.9 m)
Deck width30 ft (9.1 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,733 (2024)
Projected traffic6,863 by 2044
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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$1.1 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

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

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1973.

What condition is Mo 77 S over Drain Dtch No 1 in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in February 2025.

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

About 4,733 vehicles per day (2024 count), of which roughly 6% are trucks.

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

The structure is 88 ft (26.8 m) long with a longest span of 32 ft (9.9 m) and a deck 30 ft wide.

Who owns Mo 77 S over Drain Dtch No 1?

It is owned by the State Highway Agency.