US Bridges

604 E over Is 55

Fair

New Madrid County, Missouri · S 16 T 24 N R 14 E · Structure no. 8309

Built
1964
61 years old
Condition
Fair
inspected December 2024
Type
Slab
Concrete Continuous
Length
211 ft
4 main spans
Daily traffic
104
2024 count
Owner
State
State Highway Agency

About this bridge

604 E over Is 55 is a concrete continuous slab carrying 604 E over Is 55 in New Madrid County, Missouri. It was built in 1964, so it is 61 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 104 vehicles a day, roughly 10% of them trucks, projected to reach 161 by 2044. The structure is 211 ft (64.3 m) long and 28 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
Carries604 E
CrossesIs 55
LocationS 16 T 24 N R 14 E
RouteCounty Highway 604
CountyNew Madrid County
StateMissouri
Coordinates36.72266, -89.53816
Functional classRural Local

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating26.8 US tons
Inventory rating15.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length211 ft (64.3 m)
Longest span66 ft (20.1 m)
Deck width28 ft (8.4 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic104 (2024)
Projected traffic161 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed8.7 mi (14 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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was 604 E over Is 55 built?

It was built in 1964, making it 61 years old in 2025.

What condition is 604 E over Is 55 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 December 2024.

How much traffic does 604 E over Is 55 carry?

About 104 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is 604 E over Is 55?

The structure is 211 ft (64.3 m) long with a longest span of 66 ft (20.1 m) and a deck 28 ft wide.

Who owns 604 E over Is 55?

It is owned by the State Highway Agency.