X0101 EFFECT 33 LIVE 2012-08-03 16:00:00

S-3

0000314203 McEwen Mining Inc. 333-182192 0001552364 McEwen Mining-Minera Andes Acquisition Corp. 333-182192-12 0001360405 US GOLD CANADIAN ACQUISITION CORP 333-182192-11 0001086913 NEVADA PACIFIC GOLD LTD 333-182192-10 0001274011 TONE RESOURCES LTD 333-182192-09 0001298093 White Knight Resources Ltd. 333-182192-08 0001417238 US Gold Alberta ULC 333-182192-07 0001416052 Tonkin Springs Gold Mining CO 333-182192-06 0001416053 Tonkin Springs Venture Limited Partnership 333-182192-05 0001416054 Tonkin Springs LLC 333-182192-04 0001416055 U.S. Environmental CORP 333-182192-03 0001030219 MINERA ANDES INC /WA 333-182192-02 0001552383 McEwen Mining (Alberta) ULC 333-182192-01