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-2- <br /> HYDROLOGY REPORT CONTINUED <br /> • EFFECT ON SURFACE WATER <br /> Although the surface water drainage will change, there will <br /> be no increase in surface runoff because the mine will serve as a <br /> retention pond during periods of high precipitation. This basin could <br /> also provide ample storage to help control incoming runoff water from <br /> a minor storm. The surface water runoff to the mine will be stored <br /> by the permanent reservoir and eventually percolate through the unmined <br /> gravel deposit. Hence, there will be no adverse effect on the local <br /> drainage. <br /> • <br />