Idaho · Area of Critical Environmental Concern
Lucile Caves RNA
BLM found a natural system and a natural process here, and its plan calls for special management. BLM's records place 2 rights of way inside the line today, and a grazing allotment covers part of it. It covers 136 acres and was designated December 21, 2009, in the Cottonwood RMP 2009. 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
2 rights of way sit inside the line. BLM files 2 under non-energy facilities.
- NORTHWEST FIBER, LLC DBA ZIPLY FIBER1right of way
- IDAHO DEPARTMENT OF TRANSPORTATION1right of way
Grazing allotments
A grazing allotment covers part of this line. Its permittee isn't named here yet.
- Lucile Bar1,134acres
The nearest areas
- Upper Salmon RiverIdaho · 5,145 acres · at least 1 active mining claim and 3 more BLM lists as Filed, 25 rights of way, 23 grazing allotments covering part of it2miles
- Long Gulch RNAIdaho · 47 acres · a grazing allotment covering part of it6miles
- Skookumchuck RNAIdaho · 8.7 acres · a grazing allotment covering part of it13miles
- Lower Salmon RiverIdaho · 14,367 acres · 11 rights of way, 27 grazing allotments covering part of it30miles
- Wapshilla Ridge RNAIdaho · 402 acres · nothing placed inside37miles
Next to it
Upper Salmon River 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 Lucile Caves RNA. 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