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10 CSR 23-3.090 RegionalizationPURPOSE: This rule sets specific additional standards for certain regions in Missouri. Editor's Note: Area maps mentioned in this rule may be found following 10 CSR 23-3.110 on the MO-DNR Web site or by clicking on the hyperlinks that are located within this Web page to view specific Figures for the applicable area. |
PUBLISHER'S NOTE: The secretary of state has determined that the publication of the entire text of the material which is incorporated by reference as a portion of this rule would be unduly cumbersome or expensive. Therefore, the material which is so incorporated is on file with the agency who filed this rule, and with the Office of the Secretary of State. Any interested person may view this material at either agency's headquarters or the same will be made available at the Office of the Secretary of State at a cost not to exceed actual cost of copy reproduction. The entire text of the rule is printed here. This note refers only to the incorporated by reference material.
(1) Area 1. All persons engaged in drilling domestic wells in Area 1, a limestone or dolomite area (Figure 1 and Figure 8) shall-
(A) Set no less than eighty feet (80') of casing, extending not less than thirty feet (30') into bedrock. Example: if sixty feet (60') of residual (weathered rock) material is encountered in drilling before bedrock, then ninety feet (90') of casing must be set.
(B) Construct the drill hole a minimum of eight and five-eighths inches (8 5/8") in diameter to the surface casing point.
(C) Install new, steel or plastic casing as specified in 10 CSR 23-3.030 (steel) or 10 CSR 23-3.070 (plastic).
(D) Install and seal casing as follows:
1. Full-length grout is preferred and will ensure a better annular seal but sealing the lowermost thirty feet (30') of casing using approved grout material and procedures set out in 10 CSR 23-3.030 is required. Drill cuttings and a drive shoe or drill cuttings used by themselves are not approved grout materials. Drill cuttings may be placed above the grouted interval to fill in the annular space-
A. If steel casing is used, a drive shoe is required except on wells where the grout is allowed to cure before drilling resumes;
B. If plastic casing is used, a packer, coupling or inverted bell is required to be secured near the bottom of the casing and must hold the grout in place while drilling continues. No packer, coupling or inverted bell is required if grout is allowed to cure before drilling resumes;
C. The following times must be followed for curing grout when no packer is used:
(I) Hi-early cement-minimum set time of twelve (12) hours.
(II) Portland Type I cement-minimum set time of seventy-two (72) hours;
(III) Chipped bentonite-minimum hydration time of four (4) hours; and
(IV) High solids bentonite slurry- varies based on additives and manufacturer's specifications;
(E) If the well is to be drilled as an alluvial well-
1. No less than twenty feet (20') of casing shall be set above the screened or perforated interval of the well;
2. The drill hole shall be constructed a minimum of ten and five-eighths inches (10 5/8") in diameter being at least four inches (4") larger than the casing to be placed into it. Well casing must be at least six inch (6") nominal diameter. Graded, chlorinated gravel may be placed into the annular space adjacent to the well screen or natural gravels in the formation being drilled can be allowed to cave back against the screen;
3. Full-length grout is preferred (above the screened interval) and will ensure a better annular seal but sealing the upper twenty feet (20') of casing using approved grout materials and procedures set out in 10 CSR 23-3.030 is required.
(2) Area 2. All persons engaged in drilling domestic wells in Area 2, Central Western Missouri (Figure 2) shall-
(A) Set no less than forty feet (40') of casing, extending not less than fifteen feet (15') into bedrock. Areas where Cherokee Group sediments are present; set casing through caving zones and into waterbearing sands. In some instances this might require several hundred feet of casing. Liners may be used with minimum amount of casing listed for this area;
(B) Construct the drill hole a minimum of eight and five-eighths inches (8 5/8") in diameter to the surface casing point;
(C) Install new steel or plastic casings as specified in 10 CSR 23-3.030 (steel) or 10 CSR 23.3.070 (plastic).
(D) Install and seal casing as follows: Fulllength grout is preferred and will ensure a better annular seal but sealing the lowermost thirty feet (30') of casing using approved grout materials and procedures set out in 10 CSR 23-3.030 is required. Drill cuttings and a drive shoe or drill cuttings used by themselves are not approved grout material. Drill cuttings may be placed above the grouted interval to fill in the annular space-
1. If steel casing is used, a drive shoe is required except on wells where the grout is allowed to cure before drilling resumes;
2. If plastic casing is used, a packer, coupling or inverted bell is required to be secured near the bottom of the casing and must hold the grout in place while drilling continues. No packer, coupling or inverted bell is required if grout is allowed to cure before drilling resumes;
3. The following times must be followed for curing grout when no packer is used:
A. Hi-early cement-minimum set time of twelve (12) hours;
B. Portland Type I cement-minimum set time of seventy-two (72) hours;
C. Chipped bentonite-minimum hydration time of four (4) hours; and
D. High solids bentonite slurry-varies based on additives and manufacturer's specifications;(E) In areas where shale or shaley materialis present above the waterbearing zones, casing or liner shall be set so as to exclude intervals which would cave into the drill hole or cause muddy water to be pumped;
(F) If the well is to be drilled as an alluvial well-
1. No less than twenty feet (20') of casing shall be set above the screened or perforated interval of the well;
2. The drill hole shall be constructed a minimum of ten and five-eighths inches (10 5/8") in diameter being at least four inches (4") larger in diameter than the casing to be placed into it. Well casing must be at least six-inch (6") nominal diameter. Graded, chlorinated gravel may be placed into the annular space adjacent to the well screen or natural gravels in the formation being drilled can be allowed to cave back against the screen; and
3. Full-length grout is preferred (above the screened interval) and will ensure a better annular seal but sealing the upper twenty feet (20') of casing using approved grout materials and procedures set out in 10 CSR 23-3.030 is required;
(G) Five-Inch (5") Casing Wells. A well may be completed using a five-inch (5") nominal casing if the following standards are met:
1. The casing must be set full length and be slotted across the producing horizons.
2. The drill hole must be eight and five-eighths inches (8 5/8") in diameter with the upper forty feet (40') to be reamed out to ten and five-eighths inches (10 5/8") in diameter; and
3. The upper forty feet (40') of annular space must be grouted and the remainder of the borehole below the grout must be gravel packed.
(3) Area 3. All persons engaged in drilling domestic wells in area 3, northwest Missouri area, (Figure 3) shall-
(A) If the well is to be drilled as a glacial drift or alluvial well;
1. No less than twenty feet (20') of casing shall be set above the screened or perforated interval of the well;
2. The drill hole shall be constructed a minimum of ten and five-eighths inches (10 5/8") in diameter being at least four inches (4") larger in diameter than the casing to be placed into it. Well casing must be at least six-inch (6") nominal diameter. Graded, chlorinated gravel may be placed into the annular space adjacent to the well screen or natural (native) gravels in the formation being drilled can be allowed to cave back against the screen;
3. Full-length grout is preferred (above the screened interval) and will ensure a better annular seal but sealing the upper twenty feet (20') of casing using approved grout materials and procedures set out in 10 CSR 23-3.030 is required.
(B) If the well is to be drilled as a bedrock well-
1. Set no less than forty feet (40') of casing, extending not less than fifteen feet (15') into bedrock;
2. Construct the drill hole a minimum of eight and five-eighths inches (8 5/8") in diameter to the surface casing point;
3. Install new steel or plastic casing as specified in 10 CSR 23-3.030 (steel) or 10 CSR 23-3.070 (plastic); and 4. Install and seal casing as follows:
A. Full-length grout is preferred and will ensure a better annular seal, but sealing the lowermost thirty feet (30') of casing using approved grout materials and procedures set out in 10 CSR 23-3.030 is required. Drill cuttings and a drive shoe or drill cuttings used by themselves are not approved grout materials. Drill cuttings may be placed above grouted interval to fill in the annular space-
(I) If steel casing is used, a drive shoe is required except on wells where the grout is allowed to cure before drilling resumes;
(II) If plastic casing is used, a packer, coupling or inverted bell is required to be secured near the bottom of the casing and must hold the grout in place while drilling continues. No packer, coupling or inverted bell is required if grout is allowed to cure before drilling resumes;
(III) The following times must be followed for curing grout when no packer is used:
(a) Hi-early cement-minimum set time of twelve (12) hours;
(b) Portland Type I cement- minimum set time of seventy-two (72) hours;
(c) Chipped bentonite-minimum hydration time of four (4) hours; and
(d) High solids bentonite slurry-varies based on additives and manufacturer's specifications;(C) If usable amounts of water are not expected to be available in deeper bedrock horizons and water is only available from the upper, fractured and weathered portion of bedrock, and if the water is coming from a zone that is at least forty feet (40') deep, you must set a minimum of forty feet (40') of casing but only one foot (1') of this casing need be set into the bedrock. This allows the use of shallower water horizons under some circumstances; and (D) Five-Inch (5") Casing Wells. A well may be completed using a five-inch (5") nominal casing if the following standards are met:
1. The casing must be set full-length and be slotted across the producing horizons;
2. The drillhole must be eight and fiveeighths inches (8 5/8") in diameter with the upper forty feet (40') to be reamed out to ten and five-eighths inches (10 5/8") in diameter; and
3. The upper forty feet (40') of annular space must be grouted and the remainder of the borehole below the grout must be gravel packed.
(4) Area 4. All persons engaged in drilling domestic wells in Area 4, northeast Missouri area, (Figure 7) shall-
(A) If the well is to be drilled as a bedrock well-
1. Set no less than forty feet (40') of casing, extending not less than fifteen feet (15') into bedrock;
2. Construct the drill hole a minimum of eight and five-eighths inches (8 5/8") in diameter to the surface casing point;
3. Install new steel or plastic casing as specified in 10 CSR 23-3.030 (steel) or 10 CSR 23-3.070 (plastic); and
4. Install and seal casing as follows:
A. Full-length grout is preferred and will ensure a better annular seal but sealing the lowermost thirty (30') of casing using approved grout materials and procedures set out in 10 CSR 23-3.030 is required. Drill cuttings and a drive shoe or drill cuttings used by themselves are not approved grout materials. Drill cuttings may be placed above grouted interval to fill in the annular space-
(I) If steel casing is used, a drive shoe is required except on wells where the grout is allowed to cure before drilling resumes;
(II) If plastic casing is used, a packer, coupling or inverted bell is required to be secured near the bottom of the casing and must hold the grout in place while drilling continues. No packer, coupling or inverted bell is required if grout is allowed to cure before drilling resumes; and
(III) The following times must be followed for curing grout when no packer is used:
(a) Hi-early cement-minimum set time of twelve (12) hours;
(b) Portland Type I cement- minimum set time of seventy-two (72) hours;
(c) Chipped bentonite-minimum hydration time of four (4) hours; and
(d) High solids bentonite slurry -varies based on additives and manufacturer's specifications;(B) If the well is to be drilled as an unconsolidated materials well-
1. No less than twenty feet (20') of casing shall be set above the screened or perforated interval of the well;
2. The drill hole shall be constructed a minimum of ten and five-eighths inches (10 5/8") in diameter being at least four inches (4") larger in diameter than the casing to be placed into it. Well casing must be at least six-inch (6") nominal diameter. Graded, chlorinated gravel may be placed into the annular space adjacent to the well screen or natural (native) gravels in the formation being drilled can be allowed to cave back against the screen; and
3. Full-length grout is preferred (above the screened interval) and will ensure a better annular seal but sealing the upper twenty feet (20') of casing using approved grout materials and procedures set out in 10 CSR 23-3.030 is required.
(C) If usable amounts of water or water of acceptable quality are not expected to be available in deeper bedrock horizons and water is only available from the upper, fractured and weathered portion of bedrock, and if the water is coming from a zone that is at least forty feet (40') deep, a minimum of forty feet (40') of casing must be set but only one foot (1') of this casing need be set into the bedrock. This allows the use of shallower water horizons under some circumstances.
(5) Area 5. All persons engaged in drilling domestic wells in area 5, Missouri Bootheel and all major stream alluvial areas (Figure 5) shall-
(A) If the well is to be drilled as a bedrock well-
1. Set no less than eighty feet (80') of casing, extending not less than thirty feet (30') into bedrock;
2. Construct the drill hole a minimum of eight and five-eighths inches (8 5/8") in diameter to the surface casing point;
3. Install new steel or plastic casing as specified in 10 CSR 23-3.030 (steel) or 10 CSR 23-3.070 (plastic);
4. Install and seal casing as follows:
A. Full-length grout is preferred and will ensure a better annular seal but sealing the lowermost thirty feet (30') of casing using approved grout materials and procedures set out in 10 CSR 23-3.030 is required. Drill cuttings and a drive shoe or drill cuttings used by themselves are not approved grout materials. Drill cuttings may be placed above grouted interval to fill in the annular space;
(I) If steel casing is used, a drive shoe is required except on wells where the grout is allowed to cure before drilling resumes;
(II) If plastic casing is used, a packer, coupling or inverted bell is required to be secured near the bottom of the casing and must hold the grout in place while drilling continues. No packer, coupling or inverted bell is required if grout is allowed to cure before drilling resumes; and
(III) The following times must be followed for curing grout when no packer is used:
(a) Hi-early cement-minimum set time of twelve (12) hours;
(b) Portland Type I cement- minimum set time of seventy-two (72) hours;
(c) Chipped bentonite-minimum hydration time of four (4) hours; and
(d) High solids bentonite slurry -varies based on additives and manufacturer's specifications;(B) If the well is to be drilled as an unconsolidated materials well-
1. No less than twenty feet (20') of casing shall be set above the screened or perforated interval of the well;
2. The drill hole shall be constructed a minimum of four inches (4") larger than the casing to be placed into it. Well casing must be at least four-inch (4") nominal diameter. Graded, chlorinated gravel may be placed into the annular space adjacent to the well screen or natural (native) gravels in the formation being drilled can be allowed to cave back against the screen; and
3. Full-length grout is preferred (above the screened interval) and will ensure a better annular seal but sealing the upper twenty feet (20') of casing using approved grout materials and procedures set out in 10 CSR 23-3.030 is required.
(C) Shallow unconsolidated wells located in Area 5, the Missouri Bootheel (Figure 8) and all major stream alluvial areas may be exempted from this rule. If the wells and drillers of the wells meet the following specifications they are exempted:
1. Wells are drilled, jetted, driven, washed or constructed in other ways;
2. Wells are constructed in unconsolidated materials; and
3. Well casing diameters are no larger than two inches (2").
(6) Area 6. All persons engaged in drilling domestic wells in Area 6, St. Francois Mountain area (Figure 6) shall-
(A) Where granite or igneous rock is within one hundred feet (100') below the surface, set not less than forty feet (40') of casing extending not less than fifteen feet (15') into bedrock-
1. Construct the drill hole a minimum of eight and five-eighths inches (8 5/8") in diameter to the surface casing point;
2. Install new steel or plastic casing as specified in 10 CSR 23-3.030 (steel) or 10 CSR 23-3.070 (plastic);
3. Install and seal casing as follows:
A. Full-length grout is preferred and will ensure a better annular seal, but sealing the lowermost thirty feet (30') of casing using approved grout materials and procedures set out in 10 CSR 23-3.030 is required. Drill cuttings and a drive shoe or drill cuttings used by themselves are not approved grout materials. Drill cuttings may be placed above the grouted interval to fill in the annular space;
(I) If steel casing is used, a drive shoe is required except on wells where the grout is allowed to cure before drilling resumes;
(II) If plastic casing is used, a packer, coupling or inverted bell is required to be secured near the bottom of the casing and must hold the grout in place while drilling continues. No packer, coupling or inverted bell is required if grout is allowed to cure before drilling resumes; and
(III) The following times must be followed for curing grout when no packer is used:
(a) Hi-early cement-minimum set time of twelve (12) hours;
(b) Portland Type I cement-minimum set time of seventy-two (72) hours;
(c) Chipped bentonite-minimum hydration time of four (4) hours; and
(d) High solids bentonite slurry -varies based on additives and manufacturer's specifications.(B) In areas where granite is more than one hundred feet (100') below the surface, set not less than eighty feet (80') of casing not less than thirty feet (30') into bedrock.
1. Construct the drillhole a minimum of eight and five-eighths inches (8 5/8") in diameter to the surface casing point.
2. Install new steel or plastic casing as specified in 10 CSR 23-3.030 (steel) or 10 CSR 23-3.070 (plastic);
3. Install and seal casing as follows:
A. Full-length grout is preferred and will ensure a better annular seal, but sealing the lowermost thirty feet (30') of casing using approved grout materials and procedures set out in 10 CSR 23-3.030 is required. Drill cuttings and a drive shoe or drill cuttings used by themselves are not approved grout materials. Drill cuttings may be placed above the grouted interval to fill in the annular space;
(I) If steel casing is used, a drive shoe is required except on wells where the grout is allowed to cure before drilling resumes;
(II) If plastic casing is used, a packer, coupling or inverted bell is required to be secured near the bottom of the casing and must hold the grout in place while drilling continues. No packer, coupling or inverted bell is required if grout is allowed to cure before drilling resumes; and
(III) The following times must be followed for curing grout when no packer is used:
(a) Hi-early cement-minimum set time of twelve (12) hours;
(b) Portland Type I cement- minimum set time of seventy-two (72) hours;
(c) Chipped bentonite-minimum hydration time of four (4) hours; and
(d) High solids bentonite slurry -varies based on additives and manufacturer's specifications.
AUTHORITY: sections 256.606 and 256.626, RSMo Supp. 1991.* Original rule filed April 2, 1987, effective July 27, 1987. Emergency amendment filed Nov. 16, 1993, effective Dec. 11, 1993, expired April 9, 1994.
Amended: Filed Aug. 17, 1993, effective March 10, 1994.
*Original authority: 256.606, RSMo 1991 and 256.626, RSMo 1985, amended 1991
MO Dept. of Natural Resources: CODE OF STATE REGULATIONS - Matt Blunt (11/30/01) Secretary of State
Information on this page provided courtesy of Tom Schroeder Rotary Drilling and Pump Company - http://www.SchroederWaterWells.com