Idaho · Area of Critical Environmental Concern
Big Beaver - Little Beaver
BLM found a wildlife resource here, and its plan calls for special management. BLM's records place at least 2 mining claims BLM lists as Filed and 1 right of way inside the line today, and nine grazing allotments cover part of it. It covers 6,775 acres and was designated December 14, 1981, in the Sun Valley MFP 1981. In the plan's name, MFP stands for management framework plan.
One of the 1,120 places the Bureau of Land Management has designated an Area of Critical Environmental Concern. This page shows its line, what BLM found there and what sits inside it.
The line
Who holds the claims
At least 2 claims sit inside this line: 0 active and 2 filed and pending, 2 with a claimant BLM withholds under the Privacy Act. BLM lists 2 as Filed. None of the 2 claims was located before the area was designated.
- Names withheld by BLM (private individuals)2claims
BLM's mining rules list designated ACECs among the places where mining that disturbs the surface beyond casual use needs a plan of operations BLM approves. Exploration of five acres or less can go ahead on a notice instead.
The rights of way
1 right of way sits inside the line. BLM files 1 under non-energy facilities.
- A private individual, name withheld by this site1right of way
Grazing allotments
9 grazing allotments cover part of this line. Their permittees aren't named here yet.
- Allotment USFS-GRZ-10945.0105621,115acres
- Allotment USFS-GRZ-10860.0105618,553acres
- Camp Creek8,381acres
- Little Beaver5,732acres
- Willow Creek3,623acres
- Big Beaver2,612acres
- Allotment USFS-GRZ-10859.010562,481acres
- Cherry Creek1,051acres
- Wolftone363acres
The nearest areas
- Sun PeakIdaho · 554 acres · 2 grazing allotments covering part of it21miles
- Tee-Maze RNAIdaho · 10,742 acres · 2 rights of way, a grazing allotment covering part of it27miles
- Elk MountainIdaho · 12,671 acres · 8 grazing allotments covering part of it29miles
- McKinney Butte RNAIdaho · 3,755 acres · 3 grazing allotments covering part of it34miles
- King Hill Creek RNAIdaho · 2,511 acres · 3 grazing allotments covering part of it39miles
More from BLM's Idaho office
Every area BLM's Idaho office holdsThe proposed rule
A proposed rule, RIN 1004-AF53, would change how BLM drafts every land use plan, and how it designates ACECs like Big Beaver - Little Beaver. The comment window hasn't opened: the proposed rule wasn't in the Federal Register at our last check. The Watch sends one email the day it prints.
The rule's abstract
The purpose of this rulemaking is to establish in regulations an updated process for the approval of the development, revision, amendment, and maintenance of land use plans, as provided for by the Federal Land Policy and Management Act of 1976, for public lands administered by the Bureau of Land Management (BLM). Additionally, this rulemaking will provide clarification of the process the BLM uses for designating Areas of Critical Environmental Concern.Unified Agenda entry for RIN 1004-AF53, Publication ID 2026, reginfo.gov (OMB OIRA), read Oct 18, 2026