California · Area of Critical Environmental Concern
Santa Ana River Wash
BLM found a natural system and a natural process here, and its plan calls for special management. BLM's records place 7 rights of way inside the line today. It covers 756 acres and was designated May 26, 1994, in the South Coast.
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
The rights of way
7 rights of way sit inside the line. BLM files 6 under non-energy facilities and 1 under other energy facilities.
- ROBERTSONS READY MIX1right of way
- ROBERTSONS READY MIX INC1right of way
- Holder not listed by BLM1right of way
- SOUTHERN CALIFORNIA EDISON CO1right of way
- SAN BERNARDINO COUNTY FLOOD CONTROL (California)1right of way
- SAN BERNADINO VALLEY WATER DISTRICT1right of way
- SAN BERNARDINO VALLEY WATER CONSERVATION DISTRICT1right of way
The nearest areas
- PotreroCalifornia · 12,972 acres · 1 right of way19miles
- Juniper FlatsCalifornia · 2,387 acres · a grazing allotment covering part of it20miles
- Granite Mountain CorridorCalifornia · 60,175 acres · at least 21 active mining claims and 3 more BLM lists as Filed or Under Review, 17 rights of way, 2 grazing allotments covering part of it24miles
- Carbonate Endemic Plants RNACalifornia · 6,395 acres · at least 25 active mining claims and 132 more BLM lists as Filed, 2 rights of way, a grazing allotment covering part of it27miles
- Whitewater CanyonCalifornia · 16,415 acres · at least 2 active mining claims, 13 rights of way30miles
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 Santa Ana River 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