Mesquite Leach Pad Optimization Project (Lake or Streambed Alteration Agreement No. EPIMS-IMP-31209-R6)
7 Documents in Project
Summary
SCH Number
1998121054
Lead Agency
California Department of Fish and Wildlife, Inland Deserts Region 6
(CDFW)
Document Title
Mesquite Leach Pad Optimization Project (Lake or Streambed Alteration Agreement No. EPIMS-IMP-31209-R6)
Document Type
NOD - Notice of Determination
Received
Posted
8/21/2025
Document Description
The California Department of Fish and Wildlife (CDFW) has executed Lake and Streambed Alteration Agreement EPIMS Notification No. EPIMSIMP-31209-R6, pursuant to Section 1602 of the Fish and Game Code to County of Imperial, Planning Commission.
The Project is limited to impacts to streams associated with the construction of Leach
Pad 8 on the remaining eastern area of Section 16 along the eastern side of Pad 6 of the existing Western Mesquite Mine. The area of Leach Pad 8 covers 87.28 acres. The Leach Pad 8 design will be tied into existing leach pad and processing infrastructure. Pad 8 will generally be constructed on at least 12 inches of low permeability or compacted native or imported soil and overlain with an 80-mil linear low-density polyethylene. A layer of crushed rock/gravel will be put on top of the liner to protect the liner and provide a drainage layer. A leak detection system will be included in the design and construction underneath the primary solutions collection pipes. All Project the activities will occur within an area inside an existing fence designed to exclude desert tortoise from the Mine site.
Contact Information
Name
Luis Valenzuela
Agency Name
Imperial County Planning and Development Services
Job Title
Planner II
Contact Types
Lead/Public Agency
Phone
Name
Jacob Skaggs
Agency Name
Fish and Wildlife, Region 6
Job Title
Environmental Scientist (Specialist)
Contact Types
Responsible Agency
Phone
Location
Coordinates
Counties
Imperial
Regions
Southern California
Parcel #
039-330-038-000
Notice of Determination
Approving Agency
Fish and Wildlife, Region 6
Approving Agency Role
Responsible Agency
Approved On
County Clerk
Imperial
Final Environmental Document Available at
Imperial County Planning and Development Services
801 Main Street
El Centro, CA 92243
Determinations
(1) The project will have a significant impact on the environment
No
(2a) An Environmental Impact Report was prepared for this project pursuant to the provisions of CEQA
Yes
(2b) A Mitigated or a Negative Declaration was prepared for this project pursuant to the provisions of CEQA
No
(2c) An other document type was prepared for this project pursuant to the provisions of CEQA
No
(3) Mitigated measures were made a condition of the approval of the project
Yes
(4) A mitigation reporting or monitoring plan was adopted for this project
Yes
(5) A Statement of Overriding Considerations was adopted for this project
No
(6) Findings were made pursuant to the provisions of CEQA
Yes
Attachments
Notice of Determination
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