US Bridges

Is 55 S over Town Dtch

Fair

Scott County, Missouri · S 10 T 27 N R 14 E · Structure no. 661

Built
1962
63 years old
Condition
Fair
inspected January 2025
Type
Culvert
Concrete Continuous
Length
35 ft
2 main spans
Daily traffic
24,249
2024 count
Owner
State
State Highway Agency

About this bridge

Is 55 S over Town Dtch is a concrete continuous culvert carrying Is 55 S over Town Dtch in Scott County, Missouri. It was built in 1962, so it is 63 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 6 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 24,249 vehicles a day, roughly 29% of them trucks, projected to reach 46,073 by 2044. The structure is 35 ft (10.7 m) long. If it were closed, the detour would be 0.6 mi (1 km).

CarriesIs 55 S
CrossesTown Dtch
LocationS 10 T 27 N R 14 E
RouteInterstate 55
Coordinates36.99528, -89.53501
Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 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 evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating73.4 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length35 ft (10.7 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic24,249 (2024)
Projected traffic46,073 by 2044
Trucks29%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Is 55 S over Town Dtch built?

It was built in 1962, making it 63 years old in 2025.

What condition is Is 55 S over Town Dtch 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 Is 55 S over Town Dtch carry?

About 24,249 vehicles per day (2024 count), of which roughly 29% are trucks.

How long is Is 55 S over Town Dtch?

The structure is 35 ft (10.7 m) long with a longest span of 12 ft (3.7 m).

Who owns Is 55 S over Town Dtch?

It is owned by the State Highway Agency.