US Bridges

Mo 91 S over Drain Dtch 4 Dist

PoorPosted for load

Scott County, Missouri · S 33 T 28 N R 13 E · Structure no. 8785

Built
1933
92 years old
Condition
Poor
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel
Length
62 ft
3 main spans
Daily traffic
743
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 91 S over Drain Dtch 4 Dist is a steel stringer/multi-beam or girder carrying Mo 91 S over Drain Dtch 4 Dist in Scott County, Missouri. It was built in 1933, so it is 92 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. Its operating status is: posted for load restriction.

It carries about 743 vehicles a day, roughly 11% of them trucks, projected to reach 1,077 by 2044. The structure is 62 ft (18.9 m) long and 21 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

CarriesMo 91 S
CrossesDrain Dtch 4 Dist
LocationS 33 T 28 N R 13 E
RouteState Highway 91
Coordinates37.03878, -89.62857
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 inspectionJanuary 2025
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 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

MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadH 10
Structure length62 ft (18.9 m)
Longest span28 ft (8.5 m)
Deck width21 ft (6.4 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic743 (2024)
Projected traffic1,077 by 2044
Trucks11%
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$739,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Mo 91 S over Drain Dtch 4 Dist built?

It was built in 1933, making it 92 years old in 2025.

What condition is Mo 91 S over Drain Dtch 4 Dist 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 January 2025.

How much traffic does Mo 91 S over Drain Dtch 4 Dist carry?

About 743 vehicles per day (2024 count), of which roughly 11% are trucks.

How long is Mo 91 S over Drain Dtch 4 Dist?

The structure is 62 ft (18.9 m) long with a longest span of 28 ft (8.5 m) and a deck 21 ft wide.

Who owns Mo 91 S over Drain Dtch 4 Dist?

It is owned by the State Highway Agency.