I've said before regulations are not laws. regulations must follow laws.
but that doesn't stop them from coming up with them and lying to you. telling people "it's the law". (no it's not with a good lawyer they would lose this in court)
a motorised water pump is not a vacuum or suction dredge. a venturi, infinity or powerjet "must" be present to be considered a "dredge".
a water pump is a water pump,
a hookah is a hookah,
a dredge is a dredge.
from:
Recreational Gold Prospecting blm site
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-High banking is not allowed and is not considered casual or recreational use
-The use of suction dredges, machinery, winches, water pumps, or explosives is not considered to be casual or recreational use
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on casual or recreational use;
eCFR ? Code of Federal Regulations
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Title 43 → Subtitle B → Chapter II → Subchapter C → Part 3809.11
(a) You must submit a plan of operations and obtain BLM's approval before beginning operations greater than casual use
(b) You must submit a plan of operations for any bulk sampling in which you will remove 1,000 tons or more of presumed ore for testing.
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this is the only piece of legislator anywhere I can find that adequately defines the difference between casual and commercial use. and "significant disturbance".
and from:
https://www.law.cornell.edu/cfr/text/36/228.4
CFR 36 -> 228.4
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(a) Except as provided in paragraph (a)(1) of this section, a notice of intent to operate is required from any person proposing to conduct operations which might cause significant disturbance of surface resources. Such notice of intent to operate shall be submitted to the District Ranger having jurisdiction over the area in which the operations will be conducted. Each notice of intent to operate shall provide information sufficient to identify the area involved, the nature of the proposed operations, the route of access to the area of operations, and the method of transport.
(1) A notice of intent to operate is not required for:
(i) Operations which will be limited to the use of vehicles on existing public roads or roads used and maintained for National Forest System purposes;
(ii)
Prospecting and sampling which will not cause significant surface resource disturbance and will not involve removal of more than a reasonable amount of mineral deposit for analysis and study which generally might include searching for and occasionally removing small mineral samples or specimens, gold panning, metal detecting,
non-motorized hand sluicing, using battery operated dry washers, and collecting of mineral specimens using hand tools;
(iii) Marking and monumenting a mining claim;
(iv) Underground operations which will not cause significant surface resource disturbance;
(v) Operations, which in their totality, will not cause surface resource disturbance which is substantially different than that caused by other users of the National Forest System who are not required to obtain a Forest Service special use authorization, contract, or other written authorization;
(vi)
Operations which will not involve the use of mechanized earthmoving equipment, such as bulldozers or backhoes, or the cutting of trees, unless those operations otherwise might cause a significant disturbance of surface resources; or
(vii) Operations for which a proposed plan of operations is submitted for approval;
(2) The District Ranger will, within 15 days of receipt of a notice of intent to operate, notify the operator if approval of a plan of operations is required before the operations may begin.
(3) An operator shall submit a proposed plan of operations to the District Ranger having jurisdiction over the area in which operations will be conducted in lieu of a notice of intent to operate if the proposed operations will likely cause a significant disturbance of surface resources. An operator also shall submit a proposed plan of operations, or a proposed supplemental plan of operations consistent with § 228.4(d), to the District Ranger having jurisdiction over the area in which operations are being conducted if those operations are causing a significant disturbance of surface resources but are not covered by a current approved plan of operations. The requirement to submit a plan of operations shall not apply to the operations listed in paragraphs (a)(1)(i) through (v).
The requirement to submit a plan of operations also shall not apply to operations which will not involve the use of mechanized earthmoving equipment, such as bulldozers or backhoes, or the cutting of trees, unless those operations otherwise will likely cause a significant disturbance of surface resources.
(4) If the District Ranger determines that any operation is causing or will likely cause significant disturbance of surface resources, the District Ranger shall notify the operator that the operator must submit a proposed plan of operations for approval and that the operations can not be conducted until a plan of operations is approved.
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the emboldened parts are in conflict with each other as well as the definition of what will cause "significant disturbance".