US Bridges

Myles RD over Sigur Bayou Lateral

GoodPosted for load

Iberville Parish, Louisiana · 1 Mi. W. LA 995 · Structure no. 612430071910771

Built
1984
41 years old
Condition
Good
inspected December 2024
Type
Slab
Concrete
Length
38 ft
2 main spans
Daily traffic
30
2019 count
Owner
County
County Highway Agency

About this bridge

Myles RD over Sigur Bayou Lateral is a concrete slab carrying Myles RD over Sigur Bayou Lateral in Iberville 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. Its operating status is: posted for load restriction.

It carries about 30 vehicles a day, projected to reach 33 by 2039. The structure is 38 ft (11.6 m) long and 27 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

CarriesMyles RD
CrossesSigur Bayou Lateral
Location1 Mi. W. LA 995
RouteCounty Highway 0
Coordinates30.11739, -91.12355
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusPosted for load 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 alignment8: Equal to present desirable criteria
Operating rating42.9 US tons
Inventory rating33.2 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length38 ft (11.6 m)
Longest span19 ft (5.8 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2019)
Projected traffic33 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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 Myles RD over Sigur Bayou Lateral built?

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

What condition is Myles RD over Sigur Bayou Lateral 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 December 2024.

How much traffic does Myles RD over Sigur Bayou Lateral carry?

About 30 vehicles per day (2019 count).

How long is Myles RD over Sigur Bayou Lateral?

The structure is 38 ft (11.6 m) long with a longest span of 19 ft (5.8 m) and a deck 27 ft wide.

Who owns Myles RD over Sigur Bayou Lateral?

It is owned by the County Highway Agency.