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DWR_4148979
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DWR_4148979
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Last modified
6/27/2025 11:51:03 AM
Creation date
10/17/2023 9:12:29 AM
Metadata
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Template:
Rulemaking
Rule Name
Water Well Construction Rules (2CCR-402-2)
Document Date
10/17/2023
Document Type - Rulemaking
Draft, Proposed and Redlined Rules
Subject
October 2023 Draft Proposed Rules/Redline
Date Effective
1/1/2026
Year Initiated
2023
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FIGURE 4d <br /> TYPE 2 AQUIFER <br /> WELLS COMPLETED IN UNCONFINED BEDROCK AQUIFERS <br /> (OVERLAIN BY TYPE f3 AQUIFER) <br /> Surface Casing 1 Surface Casing 2 Without Surface Casing <br /> Ground Surface 1 foot 1 foot 1 <br /> 4 <br /> Steel Surface Casing _ Steel Casing } <br /> A1:.afs Grout as Required/• - .- Min Depth 19 ft bgs —• Min.Depth 19 ft bgs 4 <br /> by Rule 10.5.2.1 y <br /> t_ N <br /> N <br /> 10 ft Grout <br /> . Overlap •k <br /> Alknrial Materiel <br /> : , 10 ft Grout <br /> Base of Grout from - i' / Overlap Base of Grout from ! Base of Grout from <br /> at Least 39 ft bgs 1 at Least 39 ft bgs at Least 39 ft bgs <br /> • . <br /> ......... _i............................. % <br /> "" Must Grout to Base <br /> of Alluvium or <br /> Isolate Alluvium•:girth <br /> Driven Steel Casing <br /> Y Static Water Level --- -.I Static Water Level ---,Y Perforated Casing <br /> - - . Solid Casing <br /> Production Zone! - - <br /> Annular _ - : n Solid Steel Casing <br /> - Space - -_ _ hi ! Approved Grout <br /> Figure 4d. Schematic diagram for wells constructed into Type II (unconfined bedrock) aquifers, overlain by a Type III <br />(unconsolidated) aquifer. <br /> Suggest updating figure for instance where surface casing is min 39' + penetrates into bedrock where <br /> 10'grout overlap is not required. <br />
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