CONSTRUCTION PROGRESS OF EXPLORATORY STUDIES FACILITY STARTER TUNNEL.

YUCCA MOUNTAIN, SOUTHWEST BOUNDARY OF NEVADA TEST SITE, EVALUATED FOR NATION'S FIRST REPOSITORY FOR COMMERCIAL HIGH-LEVEL RADIOACTIVE WASTE. GEOLOGICAL, HYDROLOGICAL & GEOPHYSICAL DATA OBTAINED FROM EXPLORATORY HOLES DRILLED AROUND THE MOUNTAIN. WATER TABLE AT YUCCA MTN. IS 1700 FT. DEEP, PERMITS CONSTRUCTION OF A REPOSITROY SOME 700 FT. ABOVE STANDING WATER IN AN UNSATURATED ZONE. YUCCA MTN.- ONE OF THE MOST ARID & MOST SPARSELY POPULATED REGIONS IN U.S.