US Bridges

US 61 N over Spencer CR

Good

Ralls County, Missouri · S 27 T 55 N R 4 W · Structure no. 31815

Built
2007
18 years old
Condition
Good
inspected November 2024
Type
Tee Beam
Prestressed Concrete Continuous
Length
390 ft
5 main spans
Daily traffic
6,362
2024 count
Owner
State
State Highway Agency

About this bridge

US 61 N over Spencer CR is a prestressed concrete continuous tee beam carrying US 61 N over Spencer CR in Ralls County, Missouri. It was built in 2007, so it is 18 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 6,362 vehicles a day, roughly 32% of them trucks, projected to reach 12,088 by 2044. The structure is 390 ft (118.9 m) long and 39 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS 61 N
CrossesSpencer CR
LocationS 27 T 55 N R 4 W
RouteU.S. Route 61
Coordinates39.52031, -91.34267
Functional classRural Principal Arterial - Other

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66.5 US tons
Inventory rating40.7 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHL 93
Structure length390 ft (118.9 m)
Longest span115 ft (35.1 m)
Deck width39 ft (11.8 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,362 (2024)
Projected traffic12,088 by 2044
Trucks32%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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—
NavigationNo navigation control on waterway

Frequently asked questions

When was US 61 N over Spencer CR built?

It was built in 2007, making it 18 years old in 2025.

What condition is US 61 N over Spencer CR 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 November 2024.

How much traffic does US 61 N over Spencer CR carry?

About 6,362 vehicles per day (2024 count), of which roughly 32% are trucks.

How long is US 61 N over Spencer CR?

The structure is 390 ft (118.9 m) long with a longest span of 115 ft (35.1 m) and a deck 39 ft wide.

Who owns US 61 N over Spencer CR?

It is owned by the State Highway Agency.