Alaska · Area of Critical Environmental Concern
Fortymile ACEC
BLM found a wildlife resource here, and its plan calls for special management. BLM's records place 2 rights of way inside the line today. It covers 359,407 acres and was designated December 30, 2016, in the Eastern Interior RMP - Fortymile ROD. In the plan's name, RMP stands for resource management plan and ROD for record of decision.
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.
- DEPARTMENT OF THE AIR FORCE1right of way
- BUREAU OF LAND MANAGEMENT FAIRBANKS DISTRICT OFFICE TOK FIELD STATION1right of way
The nearest areas
- Mosquito Flats ACECAlaska · 36,837 acres · nothing placed inside51miles
- Big Windy Hot Spring RNAAlaska · 151 acres · nothing placed inside69miles
- Mount Prindle (SNCA) RNAAlaska · 2,847 acres · nothing placed inside125miles
- Mount Prindle (WMNRA) RNAAlaska · 3,091 acres · nothing placed inside126miles
- Salmon Fork ACECAlaska · 623,046 acres · nothing placed inside139miles
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 Fortymile 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