California · Area of Critical Environmental Concern
Halloran Wash
BLM found a cultural value here, and its plan calls for special management. BLM's records place at least 23 mining claims BLM lists as Filed and 3 rights of way inside the line today. It covers 1,744 acres and was designated September 14, 2016, in the CDCA Plan, as amended by Plan 29. In the plan's name, CDCA stands for California Desert Conservation 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
Who holds the claims
At least 23 claims sit inside this line: 0 active and 23 filed and pending, 23 with a claimant BLM withholds under the Privacy Act. BLM lists 23 as Filed.
- Names withheld by BLM (private individuals)23claims
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
3 rights of way sit inside the line. BLM files 1 under other energy facilities, 1 under fiber optic facilities and 1 under non-energy facilities.
- SOUTHERN CALIFORNIA EDISON CO1right of way
- AT&T LEASE ADMINISTRATION1right of way
- CA DEPT PUBLIC WORKS1right of way
The nearest areas
- Shadow ValleyCalifornia · 211,614 acres · at least 34 active mining claims and 161 more BLM lists as Filed, 61 rights of way9miles
- Mountain Pass Dinosaur TrackwayCalifornia · 596 acres · at least 24 active mining claims19miles
- Kingston Range WSACalifornia · 42,371 acres · nothing placed inside20miles
- Soda Mountains ExpansionCalifornia · 18,817 acres · at least 1 mining claim BLM lists as Filed, 16 rights of way21miles
- IvanpahCalifornia · 86,428 acres · at least 703 active mining claims and 637 more BLM lists as Filed, 42 rights of way, a grazing allotment covering part of it23miles
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 Halloran Wash. 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