Nev. Admin. Code § 534.360

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Current through December 31, 2024

Section 534.360 - Construction of well: Casing

1. Except as otherwise provided in subsection 2, all wells must be :

(a) Cased to:

(1) Within 10 feet from the total depth drilled; or

(2) At least 98 percent of the total depth drilled; and

(b) Constructed to prevent contamination or waste of the groundwater.

2. If no additional water is developed in the bottom portion of a borehole, neat cement, cement grout or concrete grout must be placed by tremie pipe in an upward direction from the bottom of the borehole to the bottom of the casing.

3. The casing must:

(a) Except as otherwise provided in this paragraph and NAC 534.362, be of new steel or clean and sanitary used steel. Materials other than steel may be used if the design of the well or the subsurface conditions prevent the use of steel casing and a professional engineer who holds a license issued pursuant to chapter 625 of NRS has approved the casing materials.

(b) Be free of pits and breaks.

4. No holes may be cut in the casing walls for lifting and lowering into the borehole.

5. The thickness of the wall of the production casing must meet the following standards for minimum thickness for steel well casing:

Minimum thickness for steel well casing

Depth of casing (feet)

Nominal diameter of casing (inches)

0-100

3/16

(0.188)

3/16

(0.188)

1/4

(0.25)

1/4

(0.25)

1/4

(0.25)

1/4

(0.25)

1/4

(0.25)

1/4

(0.25)

5/16

(0.3125)

5/16

(0.3125)

5/16

(0.3125)

100-200

3/16

(0.188)

3/16

(0.188)

1/4

(0.25)

1/4

(0.25)

1/4

(0.25)

1/4

(0.25)

1/4

(0.25)

1/4

(0.25)

5/16

(0.3125)

5/16

(0.3125)

5/16

(0.3125)

200-300

3/16

(0.188)

3/16

(0.188)

1/4

(0.25)

1/4

(0.25)

1/4

(0.25)

1/4

(0.25)

5/16

(0.3125)

5/16

(0.3125)

5/16

(0.3125)

5/16

(0.3125)

3/8

(0.375)

300-400

3/16

(0.188)

1/4

(0.25)

1/4

(0.25)

1/4

(0.25)

1/4

(0.25)

5/16

(0.3125)

5/16

(0.3125)

5/16

(0.3125)

5/16

(0.3125)

3/8

(0.375)

3/8

(0.375)

400-600

3/16

(0.188)

1/4

(0.25)

1/4

(0.25)

1/4

(0.25)

1/4

(0.25)

5/16

(0.3125)

5/16

(0.3125)

5/16

(0.3125)

3/8

(0.375)

3/8

(0.375)

7/16

(0.4375)

600-800

3/16

(0.188)

1/4

(0.25)

1/4

(0.25)

1/4

(0.25)

5/16

(0.3125)

5/16

(0.3125)

5/16

(0.3125)

3/8

(0.375)

3/8

(0.375)

3/8

(0.375)

7/16

(0.4375)

800-1,000

3/16

(0.188)

1/4

(0.25)

1/4

(0.25)

1/4

(0.25)

5/16

(0.3125)

5/16

(0.3125)

5/16

(0.3125)

3/8

(0.375)

7/16

(0.4375)

7/16

(0.4375)

1/2

(0.50)

1,000-1,500

3/16

(0.188)

1/4

(0.25)

5/16

(0.3125)

5/16

(0.3125)

5/16

(0.3125)

3/8

(0.375)

3/8

(0.375)

3/8

(0.375)

7/16

(0.4375)

1,500-2,000

3/16

(0.188)

1/4

(0.25)

5/16

(0.3125)

5/16

(0.3125)

5/16

(0.3125)

3/8

(0.375)

3/8

(0.375)

7/16

(0.4375)

7/16

(0.4375)

* Refer to sections 4.4.5 of the American Water Works Association Standard A100-15, as adopted by reference in subsection 6, regarding the thickness of well casings.

6. For the purpose of subsection 5, section 4.4.5 of the American Water Works Association Standard A100-15 is hereby adopted by reference. A copy of the standard may be obtained by mail from the American Water Works Association, 6666 West Quincy Avenue, Denver, Colorado 80235-3098, by telephone at (800) 926-7337 or at the Internet address http://www.awwa.org, at a cost of $115.

7. The top of the casing on all wells must be at least 18 inches above the surface of the ground or the finished grade.

8. All production casing joints must be threaded and coupled or welded and be watertight. If the casing joints are welded, each joint must be welded completely and be equal to or greater than the casing thickness. Spot welds of casing joints are prohibited.

9. In a production well, no perforated or screened section may be placed above the static water level.

10. Inner casing installed in a well must extend or telescope at least 8 feet into the lower end of the adjacent outer well casing.

11. The well driller shall ensure that the integrity of any casing to be used in the construction of the well has not been impaired by storage, shipping, handling, perforating or exposure to ultraviolet light.

Nev. Admin. Code § 534.360

St. Engineer, Drilling Wells Reg. § 3.01, eff. 5-19-81-NAC A 1-9-90; 12-30-97; R009-06, 6-1-2006; R039-12, 6-29-2012; A by R044-14, eff. 10/24/2014; A by R068-20A, eff. 12/29/2020; A by R068-20CAP, eff. 6/23/2021

NRS 534.020, 534.060, 534.110