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Upper <br />3) Metal Grate Cover - , Boundary of - <br />Disturbance <br />(To Prevent Ingress) <br />2) Vent Riser (10 ft tall) <br />- 1) Collar (Concrete) 1 ' <br />Site Access Road -- <br />I <br />Lower <br />Boundary of Existing <br />Disturbance Road <br />and <br />\� Slope <br />Waddle - Existing Slope <br />Waddle <br />Existing Slope <br />Operational Slope 1:1 - <br />Note: <br />1) Collar is 2 ft th. reinforced concrete, <br />10ft x 10 ft in size) <br />2) Vent Riser is steel ventilation tubing, RIO GRANDE SILVER, INC. <br />10 ft tall, 3/16" th. flanged tube <br />3) An expanded metal grate will be Bulldog Mine Vent Raise <br />Section View — A —A' <br />placed on top of the Vent Riser to <br />srz <br />prevent falling E DWG. No. REV <br />P 9 hazards A BD 50050 -01 1 <br />SCALE: 1 = 10 ft. I DATE : 4 / 28 / 1 <br />L -,GLI. &!:S t T /-NA_ ► <br />