Louisiana Administrative Code
Title 56 - PUBLIC WORKS
Part I - Water Wells
Chapter 3 - Water Well Construction
Section I-319 - Location in Relation to Flood Water

Universal Citation: LA Admin Code I-319

Current through Register Vol. 50, No. 9, September 20, 2024

A. Locations subject to flooding should be avoided, if possible. If a reasonable alternate site does not exist, the well may be constructed in flood-prone areas provided the top of the casing is at least 2 feet above the highest flood level which may have occurred in a 10-year period but in no case less than 2 feet above the ground surface, except when located in coastal areas along the Gulf of Mexico prone to direct impact of storm surge events. Wells with a casing size of 4 inches or less located in coastal areas prone to direct impact of storm surge events shall be constructed with:

1. well casing material strength of S/40 PVC or greater and a maximum casing height of 24 inches above ground surface;

2. protective casing material strength of S/80 PVC or greater with a diameter size providing a minimum 3 inch space between the well casing outer diameter and the outer diameter of the protective casing;

3. protective casing height of 20 to 22 inches above ground surface and a minimum depth below ground surface to 38 inches or greater;

4. spacing between the protective casing and the well casing filled with Portland cement; and

5. grouting down to a depth of at least 50 feet below ground surface.

B. Well piping shall be constructed with a check valve or other appropriate apparatus to prevent introduction of surface water into the casing in the event of damage to the external piping or pressure tanks.

C. All rig-supply water wells must be properly capped between the time the well is completed and the time the well is put into water production at the site. The cap shall be watertight and securely attached to prevent easy entry by other than the owner and to prevent the introduction of flood waters or contaminants into the well.

D. Flood information may be obtained from the U.S. Geological Survey or the administering agency of the Federal Insurance Program (i.e., municipality, police jury, regional planning authorities or the Department of Urban and Community Affairs).

AUTHORITY NOTE: Promulgated in accordance with R.S. 38:3091-R.S. 38:3098.

Disclaimer: These regulations may not be the most recent version. Louisiana may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
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