US Bridges

Harriet Quimby Ave over Monte Sano Bayou

Good

East Baton Rouge Parish, Louisiana · 1.1 M N of LA 408 · Structure no. 611730322910951

Built
1984
41 years old
Condition
Good
inspected June 2023
Type
Slab
Concrete
Length
57 ft
3 main spans
Daily traffic
100
2019 count
Owner
County
County Highway Agency

About this bridge

Harriet Quimby Ave over Monte Sano Bayou is a concrete slab carrying Harriet Quimby Ave over Monte Sano Bayou in East Baton Rouge Parish, Louisiana. It was built in 1984, so it is 41 years old, younger 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 100 vehicles a day, projected to reach 110 by 2039. The structure is 57 ft (17.4 m) long and 27 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesHarriet Quimby Ave
CrossesMonte Sano Bayou
Location1.1 M N of LA 408
RouteCounty Highway 0
CountyEast Baton Rouge Parish
StateLouisiana
Coordinates30.53574, -91.15909
Functional classRural Local

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 protection7 GoodSome minor problems.
Last inspectionJune 2023
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating52.1 US tons
Inventory rating40.3 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length57 ft (17.4 m)
Longest span19 ft (5.8 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2019)
Projected traffic110 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Harriet Quimby Ave over Monte Sano Bayou built?

It was built in 1984, making it 41 years old in 2025.

What condition is Harriet Quimby Ave 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 June 2023.

How much traffic does Harriet Quimby Ave over Monte Sano Bayou carry?

About 100 vehicles per day (2019 count).

How long is Harriet Quimby Ave over Monte Sano Bayou?

The structure is 57 ft (17.4 m) long with a longest span of 19 ft (5.8 m) and a deck 27 ft wide.

Who owns Harriet Quimby Ave over Monte Sano Bayou?

It is owned by the County Highway Agency.