Alaska · Area of Critical Environmental Concern
Poss Mountain ACEC
BLM found a wildlife resource here, and its plan calls for special management. BLM's records place at least 3 active mining claims inside the line today. It covers 8,732 acres and was designated January 1, 1991, in the Utility Corridor.
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 3 claims sit inside this line: 3 active, 3 with a holder BLM names. Of the named holders, 3 are private individuals, and we don't print their names. BLM lists 3 as Active. None of the 3 claims was located before the area was designated.
- A private individual, name withheld by this site3claims
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 nearest areas
- Jim River ACECAlaska · 202,703 acres · at least 30 active mining claims, 1 right of way42miles
- West Fork Atigun River ACECAlaska · 8,532 acres · nothing placed inside55miles
- Galbraith Lake ACECAlaska · 53,949 acres · 17 rights of way69miles
- Toolik Lake RNAAlaska · 78,027 acres · 30 rights of way77miles
- Kanuti Hot Springs ACECAlaska · 43 acres · nothing placed inside82miles
More from BLM's Alaska office
Every area BLM's Alaska 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 Poss Mountain ACEC. 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