I respectfully disagree! You need to get the claims guide published by the BLM!
You can file a placer claim OVER a load claim. BUT it must not be within "X" feet surrounding the entrance to the audit.
The lode claimant has first discovery and control over that area.
I don't have the reference in front of me right now but I think it is 100'.
You CANNOT file a lode claim OVER a placer claim because to do so you would have to be standing ON the placer claim,
therefore "prospecting for the purpose of discovery", therefore, claim-jumping!
Like I say, don't take my word, JUST BE SURE TO LOOK IT UP!
Would be interested to see what you are referencing. This is from the claims guide;
"advice from a mining attorney.
Location of Lode Over Placer Mining Claims and the Reverse
Placer mining claims have an equality both in procedure and rights with lode claims, but
a lode claim provides no rights to placer deposits and a placer claim provides no rights
to lode deposits (see Clipper Mining Company v. Eli Mining and Land Company, 194
US 220 (1904)).
The above-cited Supreme Court decision discusses the fact that a person has no right
to enter upon a valid placer mining claim to search for, or locate a lode claim without the
express permission of the placer mining claim claimant. Overly aggressive lode
prospectors may not interfere with the mining operation of the placer mining claimant. The
BLM strongly recommends that, if a lode prospector wishes to search for minerals on a
valid placer claim, written permission be obtained from the placer claimant.
If a claimant of a valid placer mining claim wishes to search for lodes on his or her claim,
they may do so; but, they will have no title to lode minerals without filing a lode mining
claim (see Campbell u. Mclntyre, 295 F.Cas. 45 (9th Cir. 1924)).
When in doubt about these matters, seek advice from a mining attorney."