X0101 EFFECT 33 LIVE 2011-09-20 15:00:00

S-3

0001086319 GASCO ENERGY INC 333-176593 0001491221 Gasco Production Co 333-176593-03 0001491592 Riverbend Gas Gathering, LLC 333-176593-02 0001491236 Myton Oilfield Rentals, LLC 333-176593-01