California · Area of Critical Environmental Concern
North Fork Cosumnes River
BLM found a natural system, a scenic value and a natural process here, and its plan calls for special management. BLM's records place at least 1 active mining claim and 1 right of way inside the line today. It covers 1,136 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
Who holds the claims
At least 1 claim sits inside this line: 1 active, 1 with a claimant BLM withholds under the Privacy Act. BLM lists 1 as Active. The claim wasn't located before the area was designated.
- Names withheld by BLM (private individuals)1claim
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 rights of way
1 right of way sits inside the line. BLM files 1 under non-energy facilities.
- A private individual, name withheld by this site1right of way
The nearest areas
- Spivey PondCalifornia · 54 acres · nothing placed inside12miles
- Pine HillCalifornia · 3,277 acres · at least 3 active mining claims, 1 right of way14miles
- Ione ManzanitaCalifornia · 274 acres · nothing placed inside23miles
- Ione Tertiary Oxisol SoilCalifornia · 92 acres · nothing placed inside25miles
- Dutch Flat/Indian Hill RNACalifornia · 317 acres · 2 rights of way37miles
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 North Fork Cosumnes River. 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