US Bridges

US0061 over Monte Sano Bayou

Good

East Baton Rouge Parish, Louisiana · 0.3 M W of US 61&LA 67 · Structure no. 611700079009784

Built
1976
49 years old
Condition
Good
inspected February 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
134 ft
3 main spans
Daily traffic
18,831
2021 count
Owner
State
State Highway Agency

About this bridge

US0061 over Monte Sano Bayou is a prestressed concrete stringer/multi-beam or girder carrying US0061 over Monte Sano Bayou in East Baton Rouge Parish, Louisiana. It was built in 1976, so it is 49 years old, older than the Louisiana average of 43 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 18,831 vehicles a day, roughly 11% of them trucks, projected to reach 20,714 by 2041. The structure is 134 ft (40.8 m) long and 28 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS0061
CrossesMonte Sano Bayou
Location0.3 M W of US 61&LA 67
RouteU.S. Route 61
Coordinates30.50856, -91.15443
Functional classUrban Collector

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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
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 rating75 US tons
Inventory rating37 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length134 ft (40.8 m)
Longest span64 ft (19.5 m)
Deck width28 ft (8.6 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,831 (2021)
Projected traffic20,714 by 2041
Trucks11%
Lanes on structure1
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 statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was US0061 over Monte Sano Bayou built?

It was built in 1976, making it 49 years old in 2025.

What condition is US0061 over Monte Sano Bayou 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 2023.

How much traffic does US0061 over Monte Sano Bayou carry?

About 18,831 vehicles per day (2021 count), of which roughly 11% are trucks.

How long is US0061 over Monte Sano Bayou?

The structure is 134 ft (40.8 m) long with a longest span of 64 ft (19.5 m) and a deck 28 ft wide.

Who owns US0061 over Monte Sano Bayou?

It is owned by the State Highway Agency.