US Bridges

US 61 S over Two Mile CR

FairPosted for load

St. Louis County, Missouri · S 25 T 45 N R 5 E · Structure no. 5191

Built
1930
95 years old, rebuilt 1977
Condition
Fair
inspected October 2024
Type
Arch - Deck
Concrete
Length
122 ft
1 main span
Daily traffic
21,816
2024 count
Owner
State
State Highway Agency

About this bridge

US 61 S over Two Mile CR is a concrete arch - deck carrying US 61 S over Two Mile CR in St. Louis County, Missouri. It was built in 1930 and reconstructed in 1977, so it is 95 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. Its operating status is: posted for load restriction.

It carries about 21,816 vehicles a day, roughly 6% of them trucks, projected to reach 30,542 by 2044. The structure is 122 ft (37.2 m) long and 77 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

CarriesUS 61 S
CrossesTwo Mile CR
LocationS 25 T 45 N R 5 E
RouteU.S. Route 61
Coordinates38.6143, -90.40601
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating38.7 US tons
Inventory rating28.8 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadH 20
Structure length122 ft (37.2 m)
Longest span60 ft (18.3 m)
Deck width77 ft (23.4 m)
Roadway width74 ft (22.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21,816 (2024)
Projected traffic30,542 by 2044
Trucks6%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 S over Two Mile CR built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1977.

What condition is US 61 S over Two Mile CR 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 October 2024.

How much traffic does US 61 S over Two Mile CR carry?

About 21,816 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is US 61 S over Two Mile CR?

The structure is 122 ft (37.2 m) long with a longest span of 60 ft (18.3 m) and a deck 77 ft wide.

Who owns US 61 S over Two Mile CR?

It is owned by the State Highway Agency.