Retrofit of the Argonaut Mine Tailings Dam

2 Documents in Project

Summary

SCH Number
2017102068
Lead Agency
Toxic Substances Control, Department of (Department of Toxic Substances Control)
Document Title
Retrofit of the Argonaut Mine Tailings Dam
Document Type
NOD - Notice of Determination
Received
Posted
12/29/2017
Present Land Use
Open area

Document Description
Project consists of removing the tailings and soil from in front of the dam so that concrete can be used to fill in the concrete arches and an earthen berm will be placed in front of the dam. The DTSC is overseeing the retrofit of the dam pursuant to CA Health and Safety Code Section 25356.1. The purpose of the Remedial Action Plan is to retrofit the dam and remove the immediate potential risk to human health and the environment by reducing or eliminating a failure of the dam which would release arsenic-contaminated failings into the drainage of the City of Jackson, CA. Cleanup activities to be conducted pursuant to the Response Plan include the following: Excavate an estimated 63,000 cubic yards of impacted tailings from in front of the dam to Argonaut Dr. consolidate the excavated impacted tailings on-Site, beneath a clean soil "cap". Fill the concrete arches of the dam will foaming concrete and placed a clean fill berm in front fo the dam for stability.

Contact Information
Tami Trearse
Department of Toxic Substances Control
8800 Cal Center Drive
Sacramento, CA 95826-3000

Phone : (916) 255-3747

Location

Cities
Jackson
Counties
Amador
Cross Streets
Argonaut Dr and Sutter St
Zip
95642
Total Acres
2
Parcel #
044-010-074, 082, 083, 084, 100
State Highways
I-5
Airports
Amador County Airport
Schools
Argonaut HS /MS

Notice of Determination

Approving Agency
DTSC
Approving Agency Role
Lead Agency
Approved On
Final Environmental Document Available at
8800 California Center Dr., Sacramento, CA 95826

Determinations

(1) The project will have a significant impact on the environment
Yes
(2a) An Environmental Impact Report was prepared for this project pursuant to the provisions of CEQA
No
(2b) A Mitigated or a Negative Declaration was prepared for this project pursuant to the provisions of CEQA
Yes
(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
N/A
(5) A Statement of Overriding Considerations was adopted for this project
No
(6) Findings were made pursuant to the provisions of CEQA
Yes

Disclaimer: The document was originally posted before CEQAnet had the capability to host attachments for the public. To obtain the original attachments for this document, please contact the lead agency at the contact information listed above. You may also contact the OPR via email at state.clearinghouse@opr.ca.gov or via phone at (916) 445-0613.

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