California Code of Regulations
Title 14 - Natural Resources
Division 2 - Department of Conservation
Chapter 4 - Development, Regulation, and Conservation of Oil and Gas Resources
Subchapter 4 - State-Wide Geothermal Regulations
Article 7 - Subsidence
Section 1971 - Imperial Valley Subsidence Regulations

Universal Citation: 14 CA Code of Regs 1971

Current through Register 2024 Notice Reg. No. 38, September 20, 2024

(a) Surveys and Bench Marks.

(1) Subsidence bench marks, at wellsites, tied to existing first- and/or second-order networks, are required for all wells that will be tested or produced. These bench marks shall be the responsibility of and at the expense of the operator. Surveys shall precede extensive production testing of the well.

(2) All survey work shall be coordinated with the County Surveyor.

(3) All work shall be done under the direct supervision of a Registered Civil Engineer or Licensed Land Surveyor.

(4) An adequate series of bench marks shall be set as required by the Division and shall be tied to existing survey nets.

(5) All field work, computations, etc., shall conform to National Geodetic Survey (N.G.S.) standards. Refer to "Manual of Geodetic Leveling" (1948).

(6) All surveys shall be second-order or better.

(7) All single-point tie-ins shall be double-run. Survey loops between two points on existing surveys may be single-run.

(8) Equipment shall be equal to or better than that accepted by the N.G.S. for second-order surveys. The N.G.S. procedures shall be followed.

(9) Types of acceptable bench marks are:
(A) Brass rod driven to refusal or 9 meters (about 30 feet) and fitted with an acceptable brass plate.

(B) Permanent structure (head walls, bridges, etc.) with installed plate.

(10) Bench marks at wellsites shall be situated so as to minimize the possibility of being destroyed during any subsequent work-over activity at the wells. Each bench mark shall be well marked so as to be plainly visible to work-over crews.

(11) Between the wellsite and the network, bench marks shall be set at one-half mile intervals or as specified by the Division.

(12) Surveys shall be run annually by and at the expense of the operator while well(s) are being produced unless otherwise specified by the Division.

(13) The adjusted data from all surveys shall be submitted to the Division within 60 days after leveling is completed.

(14) Resurveys of the first- and second-order networks shall be coordinated by the Division.

(b) Reservoir Engineering.

(1) Initial bottom-hole pressures and temperatures (allowing a minimum of one month static time) shall be submitted to the Division within thirty (30) days of completion of work.

(2) All preliminary test data shall be submitted to the Division within 30 days of completion of the tests.

(3) Monthly surface recordings of production, injection, temperature, and pressure shall be reported to the Division on the appropriate forms.

(4) Periodic development and review meetings between operators and the Division shall be required (at least one per year).

1. Amendment of subsection (b)(1) filed 8-13-76 as procedural and organizational; effective upon filing (Register 76, No. 33).
2. Change without regulatory effect amending subsections (a)(5) and (a)(8) filed 9-3-96 pursuant to section 100, title 1, California Code of Regulations (Register 96, No. 36).
3. Change without regulatory effect amending section filed 12-26-2006 pursuant to section 100, title 1, California Code of Regulations (Register 2006, No. 52).

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