The City of Downey has no cryptocurrency-mining ordinance. A commercial mining operation is treated like any data center - sited in an M-1 or M-2 manufacturing zone, classified into the nearest listed use, and bound by the § 4606.3 noise limits.
Downey's Municipal Code has no crypto-mining, bitcoin, or blockchain use category and no energy cap on mining. A warehouse of mining rigs draws power and produces heat and noise like a data center, so the Planning Division classifies it into the closest use in Table 9.3.9 for the M-1 and M-2 zones - permitted by right if read as a warehouse or R&D use, or requiring a Conditional Use Permit as a public utility. Because unlisted uses are Not Permitted, an unusual mining use can be denied outright. Continuous noise must stay within § 4606.3: 70 db(A) on manufacturing land, 45 db(A) overnight at homes. Home mining is residential use, subject to the same property-boundary noise limits.
There are no crypto-specific penalties. A mining operation outside the M-1 or M-2 zones, or without a required Conditional Use Permit, is a Zoning Code violation, and noise over the § 4606.3 limits is a public nuisance.
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