Idaho · Area of Critical Environmental Concern
Thousand Springs
BLM found a natural system, a wildlife resource and a natural process here, and its plan calls for special management. BLM's records place 1 right of way inside the line today, and a grazing allotment covers part of it. It covers 907 acres and was designated July 29, 1999, in the Challis RMP 1999. In the plan's name, RMP stands for resource management 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
The rights of way
1 right of way sits inside the line. BLM files 1 under non-energy facilities.
- IDAHO DEPARTMENT OF TRANSPORTATION1right of way
Grazing allotments
A grazing allotment covers part of this line. Its permittee isn't named here yet.
- Thousand Springs7,615acres
The nearest areas
- Thousand Springs RNAIdaho · 233 acres · nothing placed inside3miles
- Peck's Canyon RNAIdaho · 782 acres · a grazing allotment covering part of it7miles
- Herd Creek Watershed RNAIdaho · 1,056 acres · 2 grazing allotments covering part of it12miles
- Antelope Flat RNAIdaho · 588 acres · 2 grazing allotments covering part of it14miles
- Herd Creek WatershedIdaho · 16,887 acres · 3 rights of way, 4 grazing allotments covering part of it15miles
Next to it
Thousand Springs Research Natural Area of Critical Environmental Concern touches the line.
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 Thousand Springs. 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