Projects

Technical Reports

Yoquivo

Tetra Tech, Yoquivo Project, Technical Report Summary on Mineral Resource Estimate, February 24, 2023. Prepared under SEC S-K 1300 guidelines.

Mine Technical Services, Ltd., NI 43-101 Technical Report on Mineral Resource Estimate, February 24, 2023. Prepared under Canadian NI 43-101 guidelines.

El Quevar

Amec Foster Wheeler E&C Services Inc., NI 43-101 Technical Report on Updated Mineral Resource Estimate, Feb. 26, 2018

Amec Foster Wheeler E&C Services Inc., NI 43-101 Technical Report on Preliminary Economic Assessment, Sept. 4, 2018

Rodeo

Tetra Tech, Rodeo Technical Report Summary. March 2023. Prepared under SEC S-K 1300 guidelines.

Tetra Tech, Rodeo Project, Technical Report Summary. March 2022. Prepared under SEC S-K 1300 guidelines.

Tetra Tech, Rodeo Project, Preliminary Economic Assessment Update. Oct. 31, 2021. Prepared under Canadian NI 43-101 guidelines.

Mineral Resources Engineering, NI 43-101 Technical Report: Preliminary Economic Assessment, Rodeo Project, April 1, 2020. Prepared under Canadian NI 43-101 guidelines.

Tetra Tech, NI 43-101 Technical Report - Mineral Resource Estimate, Jan. 26, 2017. Prepared under Canadian NI 43-101 guidelines.

Santa Maria

Tetra Tech, NI 43-101 Technical Report - Updated Preliminary Economic Assessment, Sept. 14, 2018

Velardeña

Tetra Tech, Preliminary Economic Assessment Update, NI 43-101 Technical Report of the Velardeña Project. Issue date August 18, 2023.

Tetra Tech, Velardeña Project, Technical Report Summary. August 2023. Prepared under SEC S-K 1300 guidelines.

Preliminary Economic Assessment Update, NI 43-101 Technical Report of the Velardeña Project, March 1, 2022. Prepared under Canadian NI 43-101 guidelines.

Tetra Tech, Velardeña Project, Technical Report Summary. March 2022. Prepared under SEC S-K 1300 guidelines.

Tetra Tech, Preliminary Economic Assessment & NI 43-101 Technical Report, May 8, 2020. Prepared under Canadian NI 43-101 guidelines.

Tetra Tech, NI 43-101 Technical Report - Preliminary Economic Assessment, Feb. 20, 2015. Prepared under Canadian NI 43-101 guidelines.