Gatos Silver (GATO) S-1/A IPO registration (amended)

Exhibit 23.4

CONSENT OF TETRA TECH MM, INC.

Tetra Tech MM, Inc. (Tetra Tech) hereby consents to the use by Sunshine Silver Mines Corporation in connection with its Registration Statement on Form S-1 and related prospectus dated December 21, 2012 (the “Registration Statement”), of the Tetra Tech reports concerning the Sunshine Mine and the Los Gatos Project and all information derived from its reports.

Tetra Tech also consent to all references to itself in the prospectus contained in such Registration Statement, including under the heading “Experts.”

	/s/ Tetra Tech MM, Inc.
Date: December 21, 2012	TETRA TECH MM, INC.