And any type of helicopter-based visual ground surveys and other similar work (SARs, wildlife and park resource management projects, fire fighting, crop dusting, etc), often require helicopters to fly very low, even just tens of feet above ground...
There are two BLM parcels in my area that are landlocked and both of them have “private” roads leading to them that are now gated by the adjacent landowners. One I used to like to fly on and the other has an active mining claim that the...
More details here- interesting how the land owner tried to keep public lands to himself. There’s also interesting information about the unlawful enclosures act that prevents a land owner from fencing off public lands...