US Bridges

US 61 N over Is 55

Good

Scott County, Missouri · S 17 T 29 N R 14 E · Structure no. 35604

Built
2017
8 years old
Condition
Good
inspected February 2025
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
244 ft
4 main spans
Daily traffic
1,898
2024 count
Owner
State
State Highway Agency

About this bridge

US 61 N over Is 55 is a steel continuous stringer/multi-beam or girder carrying US 61 N over Is 55 in Scott County, Missouri. It was built in 2017, so it is 8 years old, younger than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,898 vehicles a day, roughly 8% of them trucks, projected to reach 2,752 by 2044. The structure is 244 ft (74.3 m) long and 51 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

CarriesUS 61 N
CrossesIs 55
LocationS 17 T 29 N R 14 E
RouteU.S. Route 61
Coordinates37.18282, -89.53762
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating73.4 US tons
Inventory rating44.6 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHL 93
Structure length244 ft (74.3 m)
Longest span74 ft (22.6 m)
Deck width51 ft (15.4 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,898 (2024)
Projected traffic2,752 by 2044
Trucks8%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed14.9 mi (24 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 61 N over Is 55 built?

It was built in 2017, making it 8 years old in 2025.

What condition is US 61 N over Is 55 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in February 2025.

How much traffic does US 61 N over Is 55 carry?

About 1,898 vehicles per day (2024 count), of which roughly 8% are trucks.

How long is US 61 N over Is 55?

The structure is 244 ft (74.3 m) long with a longest span of 74 ft (22.6 m) and a deck 51 ft wide.

Who owns US 61 N over Is 55?

It is owned by the State Highway Agency.