California · Area of Critical Environmental Concern
Ione Tertiary Oxisol Soil
BLM found a natural system and a natural process here, and its plan calls for special management. Nothing that BLM's records place sits inside the line today. It covers 92 acres and was designated February 1, 2008, in the Sierra.
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, right of way or grazing allotment.
The nearest areas
- Ione ManzanitaCalifornia · 274 acres · nothing placed inside4miles
- North Fork Cosumnes RiverCalifornia · 1,136 acres · at least 1 active mining claim, 1 right of way25miles
- Cosumnes RiverCalifornia · 2,033 acres · 1 right of way29miles
- Pine HillCalifornia · 3,277 acres · at least 3 active mining claims, 1 right of way31miles
- Nissenan ManzanitaCalifornia · 130 acres · nothing placed inside35miles
More from BLM's California office
Every area BLM's California 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 Ione Tertiary Oxisol Soil. 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