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<br />NORMAN E. PEHRSON <br /> <br />craters for water storage and recharge and in fracturing impermeable strata hindering the movement of <br />water underground, and concludes that the nuclear crateting method offers an economic advantage <br />over conventional methods of constructing dams, reservoirs, and spreading basins for projects develop- <br />ing 6,000 acre-feet of storage or more. Although the use;of nuclear explosives introduces problems <br />and hazards not associated with conventional methods of excavation, including radiation fallout from <br />the atmosphere, radioactive contamination underground, ~nd deformation of media surrounding the <br />shot point, the report states that present indications are that none of these problems constitute a ser- <br />ious limitation to the use of nuclear explosives, except in;metropolitan or other highly populated a- <br />reas. When these problems are solved, it may be that nuclear excavation will play an important part in <br />future water resources development work. <br /> <br />In closing, I wish to emphasize that the Corps of Engineers in its work of developing compre- <br />hensive plans for water and related land resources development recognizes that flood control and wa- <br />ter conservation are inseparable. The problem, of course, is to arrive at the best balance between the <br />two in the light of engineering economics and human needs. <br /> <br />Thank you. <br /> <br />. <br /> <br />. <br /> <br /> <br />-14- <br />