Notice of Availability of Draft Environmental Impact Report
TO: Lassen County Times Online
FROM: Gaylon F. Norwood, Director
Lassen County Department of Planning and Building Services
SUBJECT: EIR #2023-004, TLT Enterprises Skyline Mine
The Lassen County Department of Planning and Building Services (County) has prepared a Draft Environmental Impact Report (Draft EIR) for the proposed TLT Enterprises Skyline Mine Project (UP No. 2023-010 and RP No. 2023-001).
Project Location: The proposed project would be located on approximately 460 acres of a 640-acre parcel, located approximately one-and-a-half miles east of State Routh 139 off of Skyline Road to the northeast of Susanville in Lassen County (APN 101-110-024).
Project Description: The proposed project at the Skyline Aggregates site would include mining, processing, and reclamation activities by Hat Creek Construction and Materials, Inc. on approximately 460 acres of a 640-acre parcel. Materials mined onsite will consist of hard rock aggregate. Aggregate mined on the site will be crushed, screened, washed, and graded onsite and then used in the production of virgin aggregates, asphalt mix, and ready-mix concrete. Equipment onsite will include loaders, generators, a concrete batch plant, concrete trucks, service truck, man lift, belly dump, articulated dump truck, crusher, and asphalt batch plant. Wet suppression will be used when necessary to control dust caused by excavation, processing activities, and materials transport. Backup generators will be available onsite.
The site will be mined in five phases, taking approximately 10 years per phase and 50 years total to complete. Mining operations are estimated to begin in the spring of 2027, following permit approval. The termination date will be based on demand.
Related Zoning and Uses: The proposed project site is located in Lassen County and within the area covered by the Susanville Vicinity Area Plan, 1984. APN 101-110-024 is zoned U-C-A-P (Upland Conservation, Agricultural Preserve Combining District) and is designated as “Urban Reserve/Intensive” by the Lassen County General Plan. No general plan or zone amendments are being requested.
Environmental Topics Evaluated: The Draft EIR examines the potential impacts generated by the proposed project in relation to the potential of the project to have an impact on the environment. Below is a list of anticipated significant environmental effects
| Less Than Significant with Incorporation of Mitigation | Significant and Unavoidable Impacts |
| ● Air Quality | ● Aesthetics and Visual Resources |
| ● Cultural and Tribal Cultural Resources | ● Biological Resources |
| ● Geology and Soils | ● Significant Cumulative Impacts |
| ● Land Use and Planning | |
| ● Noise | |
| ● Transportation | |
| ● Wildfire |
A copy of the Draft EIR is available for review at the Lassen County Department of Planning and Building Services, 707 Nevada Street, Suite 5, Susanville, California, 96130 from 7 a.m. to 12 p.m. and 1 p.m. to 4 p.m., Monday through Friday, excepting holidays. The Draft EIR is also available on the Planning and Building Services webpage:
The public comment period begins on May 6, 2026 and will end on June 20, 2026 at 4:00 p.m. Written comments can be mailed to the attention of Gaylon F. Norwood, Lassen County, 707 Nevada Street, Suite 5, Susanville, California, 96130 or via email at GNorwood@co.lassen.ca.us.
