Alaska · Area of Critical Environmental Concern
Dulbi-Kaiyuh Mountains Subunit 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 54,248 acres and was designated September 26, 1986, in the Central Yukon Planning Area.
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
- Galena Mountain ACECAlaska · 19,360 acres · nothing placed inside10miles
- Hogatza River Tributaries ACECAlaska · 30,508 acres · 1 right of way80miles
- Indian River ACECAlaska · 161,195 acres · 3 rights of way87miles
- Sulukna River ACECAlaska · 23,266 acres · nothing placed inside88miles
- Nulato Hills (CY) ACECAlaska · 41,733 acres · nothing placed inside99miles
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 Dulbi-Kaiyuh Mountains Subunit 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