Alaska · Area of Critical Environmental Concern
Mosquito Flats ACEC
BLM found a wildlife resource here, and its plan calls for special management. Nothing that BLM's records place sits inside the line today. It covers 36,837 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
Ground: USGS The National Map, topographic tiles. Boundaries: BLM's own, read Oct 20, 2026.Inside the line
Nothing sits inside this line that BLM's records place: no mining claim, lease or right of way. BLM's allotment map doesn't cover Alaska.
The nearest areas
- Fortymile ACECAlaska · 359,407 acres · 2 rights of way51miles
- Big Windy Hot Spring RNAAlaska · 151 acres · nothing placed inside106miles
- Mount Prindle (SNCA) RNAAlaska · 2,847 acres · nothing placed inside153miles
- Mount Prindle (WMNRA) RNAAlaska · 3,091 acres · nothing placed inside154miles
- Limestone Jags RNAAlaska · 4,884 acres · nothing placed inside178miles
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 Mosquito Flats 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