US Bridges

Is 55 S over Dtch No 2

Fair

Scott County, Missouri · S 25 T 30 N R 13 E · Structure no. 6174

Built
1950
75 years old, rebuilt 1988
Condition
Fair
inspected February 2025
Type
Slab
Concrete Continuous
Length
69 ft
3 main spans
Daily traffic
18,355
2024 count
Owner
State
State Highway Agency

About this bridge

Is 55 S over Dtch No 2 is a concrete continuous slab carrying Is 55 S over Dtch No 2 in Scott County, Missouri. It was built in 1950 and reconstructed in 1988, so it is 75 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 18,355 vehicles a day, roughly 21% of them trucks, projected to reach 34,875 by 2044. The structure is 69 ft (21 m) long and 34 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesIs 55 S
CrossesDtch No 2
LocationS 25 T 30 N R 13 E
RouteInterstate 55
CountyScott County
StateMissouri
Coordinates37.23294, -89.5653
Functional classUrban 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42.7 US tons
Inventory rating25.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length69 ft (21 m)
Longest span24 ft (7.3 m)
Deck width34 ft (10.5 m)
Roadway width32 ft (9.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,355 (2024)
Projected traffic34,875 by 2044
Trucks21%
Lanes on structure2
Traffic directionOne-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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$591,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Is 55 S over Dtch No 2 built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 1988.

What condition is Is 55 S over Dtch No 2 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 February 2025.

How much traffic does Is 55 S over Dtch No 2 carry?

About 18,355 vehicles per day (2024 count), of which roughly 21% are trucks.

How long is Is 55 S over Dtch No 2?

The structure is 69 ft (21 m) long with a longest span of 24 ft (7.3 m) and a deck 34 ft wide.

Who owns Is 55 S over Dtch No 2?

It is owned by the State Highway Agency.