X0101 EFFECT 33 LIVE 2009-04-23 16:30:00

S-3

0000314203 U S GOLD CORP 333-157998 0001360405 US GOLD CANADIAN ACQUISITION CORP 333-157998-10 0001086913 NEVADA PACIFIC GOLD LTD 333-157998-09 0001274011 TONE RESOURCES LTD 333-157998-08 0001298093 White Knight Resources Ltd. 333-157998-07 0001417238 US Gold Alberta ULC 333-157998-06 0001416052 Tonkin Springs Gold Mining CO 333-157998-05 0001416053 Tonkin Springs Venture Limited Partnership 333-157998-04 0001416054 Tonkin Springs LLC 333-157998-03 0001416055 U.S. Environmental CORP 333-157998-02 0001360408 US GOLD HOLDINGS CORP 333-157998-01