Controlling Ground
The ground a mining claim holder can actually hold once overlaps with other mining claims, closed land, and defects in the record are taken into account, as opposed to the acreage filed.
Detailed Definition
Controlling ground is a working term for the ground a mining claim holder can actually hold. It starts from what was staked and filed, then subtracts what other mining claims, land status, and the record take away. It is not a term in the Mining Law or BLM's regulations.
Filed acreage versus held ground
The recorded size is a ceiling. A lode claim "must not exceed 1,500 by 600 feet," an individual placer claim "may not exceed 20 acres," and an association placer claim "may not exceed 160 acres" (43 CFR 3832.22). BLM's mining claim data carries a "Case Acres" figure for each case, but maps mining claims only to the quarter section. The ground a mining claim actually covers is described in the notice or certificate of location in the case file.
What reduces it
- Prior mining claims. A lode locator holds "the exclusive right of possession and enjoyment of all the surface included within the lines of their locations" (30 U.S.C. 26). Where two mining claims cover the same ground, only one can hold it; see Seniority.
- Closed land. A mining claim located on land "withdrawn from mineral entry at the time you locate it" is forfeited, and the defect cannot be cured (43 CFR 3833.91(c)).
- Placer acreage. "Each 10-acre aliquot part of your placer claim must be mineral-in-character" (43 CFR 3832.21(b)(2)).
- Mill site use. Each "two and a half acre portion of a mill site" must be used or occupied to be valid (43 CFR 3832.33(a)(2)).
- Association placer transfers. Transferring an association placer to fewer claimants before a discovery can require reducing the acreage to meet "the 20-acre per locator limit" (43 CFR 3833.33).
Who controls it on the record
Until a transfer is filed with BLM, "the Department will treat the last owner of record as the responsible party for maintaining the mining claim or site" (43 CFR 3833.92). A buyer who has recorded a deed only in the county is not the claimant of record with BLM.
BLM's regulations also use "control" in a narrower sense: for the small miner waiver, control means "actual control, legal control, or the power to exercise control" through common directors, officers, stockholders, or similar ties (43 CFR 3830.5). That test decides whose mining claims count toward the 10-mining-claim limit, not who holds the ground.
Recording does not create it
Recording a mining claim or paying its fees "does not make a claim or site valid if it not otherwise valid under applicable law" (43 CFR 3833.1(b)). Held ground still depends on discovery and on the land having been open when the mining claim was located.
Why it matters in mining claim research
Two positions with the same number of mining claims can hold very different amounts of ground. Measuring controlling ground means plotting staked boundaries, removing overlaps and closed land, and confirming the claimant of record. See also Overlap Analysis, Claim Block, and Claim Conflict.
Related Terms
Seniority
The ranking of rival interests in the same ground, the earlier ahead of the later. Federal law ties some mining claim rights to dates, but BLM leaves disputes over possession to the courts.
Junior Claim
The later of two mining claims covering the same ground. It gains the overlap only if the earlier mining claim was not valid or had ended when the later one was located.
Senior Claim
The earlier of two mining claims covering the same ground. Its priority holds only while the earlier location stays valid, recorded, and maintained.
Claim Block
A group of contiguous mining claims held by the same owner or group of owners, usually laid out to cover one mineral deposit and the ground needed to work it.
Claim Conflict
An overlap or competing interest between a mining claim and another mining claim or site, a patent, a lease, or a withdrawal on the same ground.
Overlap Analysis
Comparing the boundaries of mining claims with each other and with withdrawals and land status to find where they coincide, then checking the records to see which overlaps are real.