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III. OFFSITE DRAINAGE CONTRIBUTION <br />Most of the off site drainage does not affect the developed •rea. <br />The runoff will be passed through the site as historic flow. The water- <br />sheds have been located on the Drainage Aspects drawing to Include any <br />runoff that will flow into the site. Therefore the peak runoff rate re- <br />fleets the entire drainage area, The culverts are sued to convey the <br />water under tfie access road and drain into Munger Creek. <br />IV. SITE DRAINAGE <br />A. Watersheds A and B <br />Watershed B Is the furthest upstream and is above the mine site. <br />Watershed A will combine with B's runoff before passing under the road. <br />Therefore, calculations have been shown for the combination of A and <br />B, as wail as sizing of a culvert for the two watersheds. Also, each <br />watershed has been calculated separately should the mine site (A) need <br />. to be considered independently from watershed B. <br />B. Watersheds C, D and E <br />These have been considered separately since each one will drain <br />independently into the tributary from watersheds A and B then into Munger <br />Creek. Calculations of runoff and culverts are in Drainage Calculations. <br />C. Watersheds F and X <br />Watersheds F and X have been combined since watershed X will <br />contribute to watershed F before crossing access road. Also each water- <br />shed has been calculated separately should the need arise that the runoff <br />from each watershed be required. <br /> <br />_~ <br />