Gem Hill Quarry Project by CalPortland Company (PP21404)

4 Documents in Project

Summary

SCH Number
2021110076
Lead Agency
Kern County
Document Title
Gem Hill Quarry Project by CalPortland Company (PP21404)
Document Type
NOD - Notice of Determination
Received
Posted
11/16/2022
Document Description
The project proponent has submitted: (a) a Conditional Use Permit (CUP 45, Map 214) application, to allow a surface mining operation and development of a reclamation plan on 82 acres of an approximately 210-acre reclamation plan boundary, which would utilize a 0.75-acre primary access road outside of such reclamation plan boundary to provide access to/from Mojave Tropico Road. Access to the site would be obtained via two access roads to Mojave Tropico Road, specifically the aforementioned access road and a secondary access road to the north thereof. The project proponent proposes to employ open pit, multibench, and drill and blast mining techniques to mine naturally occurring pozzolan (volcanic tuff), which is used in the production of cement. No crushing or processing of mined mined material would occur onsite. The life of the operation is proposed to be 30 years. Annual mineral production is estimated to be 500,000 tons, and the maximum total mineral production is estimated to be 15,000,000 million tons. The total anticipated production of mine waste (overburden) is estimated to be 600,000 tons, which would be disposed in two onsite overburden stockpiles. The proposed maximum depth of excavation is 300 feet below original grade. No phasing of mining is proposed. Maximum operational inter-bench slopes (also referred to as bench face slopes) for the quarry will be 0.25:1 (horizontal:vertical (H:V)) with overall slopes of 1:1 (H:V). Maximum final reclaimed inter-bench slopes for the quarry will be 0.25:1 (H:V). Overall final reclaimed slopes for the quarry will be a maximum of 1:1 (H:V). Maximum operational slopes for the overburden stockpiles will be 1.5:1 (H:V). Maximum and overall final reclaimed slopes for the overburden stockpiles will be 2:1 (H:V). Operations would typically be conducted between 7:00 a.m. and 7:00 p.m., Monday through Saturday, with the understanding that additional shifts or longer/alternative hours may be required due to operational constraints. As proposed, there would be a maximum of 20 employees onsite at any one time. These 20 employees would include haul truck drivers, who would haul overburden onsite (from the quarry to the overburden stockpiles), as well as hauling naturally occurring pozzolan (volcanic tuff) offsite to clients.

Contact Information

Name
Randall Cates
Agency Name
Kern County Planning and Natural Resources Department
Job Title
Planner III
Contact Types
Lead/Public Agency

Location

Cities
Rosamond
Counties
Kern
Regions
Unincorporated
Cross Streets
Mojave Tropico Rd. & Backus Rd
Total Acres
210.75
Parcel #
Multiple
State Highways
N/A
Railways
N/A
Airports
N/A
Schools
N/A
Waterways
N/A
Township
10N
Range
13W
Section
Multi
Base
SBBM

Notice of Determination

Approving Agency
Kern County Planning and Natural Resources Department
Approving Agency Role
Lead Agency
Approved On
County Clerk
Kern
Final Environmental Document Available at
https://kernplanning.com/environmental-doc/gem-hill-quarry-project/

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
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
Yes
(6) Findings were made pursuant to the provisions of CEQA
Yes

Attachments

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