Statutes, codes, and regulations
California Code Of Regulations
Title 27 - Environmental ProtectionDivision 2 - Solid WasteSubdivision 1 - Consolidated Regulations for Treatment, Storage, Processing or Disposal of Solid WasteChapter 7 - Special Treatment, Storage, and Disposal UnitsSubchapter 1 - Mining Waste Management
Article 1 - SWRCB-Mining Waste Management Regulations (C15: Article 7)
Table 1.2 - Floodplain Siting Criteria

Cal. Code Regs. Tit. 27, div. 2, 1, ch. 7, subch. 1, art. 1, tbl. 1.2

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Current through Register 2024 Notice Reg. No. 25, June 21, 2024
Table 1.2 - Floodplain Siting Criteria

Waste GroupWaste Management UnitExisting Units1New Units
AWaste Pile Surface Impoundment Tailings PondProtect from 100-year peak streamflowOutside 100-year floodplain
BWaste Pile Surface Impoundment Tailings PondProtect from 100-year peakstreamflow
CWaste Pile Surface Impoundment Tailings PondRetrofit as needed to protect surface water qualityPreclude increased sediment in surface water2
1 As required by the RWQCB pursuant § 22470(a).
2 Mining wastes shall not be placed in perennial, intermittent, or ephemeral stream channels unless provision is made to divert runoff around the waste in a non-erosive manner. Wastes shall not be placed where they can be eroded by streamflows or where they can cause accelerated streambank erosion. Waste generated during seasonal mining operations may be exempted from these requirements provided that increased sediment in surface water is precluded.

Cal. Code Regs. Tit. 27, div. 2, 1, ch. 7, subch. 1, art. 1, tbl. 1.2