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this turbulent, highly changeable, low velocity wind on revegation would <br />be slight. <br />During the summer months, it is likely the quarry site would <br />be somewhat warmer than the ridgetops at the same elevation. The basin <br />structure of the site would tend to accumulate heat during the day much <br />as deep canyons do. Temperature differences are hard to estimate, but <br />2° to 5°F would not be unlikely and on windless days could be as much as <br />10°F warmer. <br />At night however the quarry would cool rapidly and become <br />somewhat cooler than ridgetops at the same elevation. Cool air would <br />flow down the drainage system to the SE thereby m.emoving much of the <br />heat from the quarry. <br />On the whole, this topographic configuration would produce a <br />• larger diurnal temperature range than would be anticipatdd on nearby <br />ridges at a similar elevation. This effect, however, wou13 not be so <br />extreme as to significantly influence the growth of vegetation on the <br />site once it is in the reclamation process. <br />The winter months present a very different pattern to the local <br />climate, much more than would be anticipated by examining the climate <br />records. The bowl-shaped depression serves to reduce the temperature <br />in two ways. First, the lack of winter sunshine over much of the quarry <br />reduces the temparature and retains snowfall longer than expected. <br />Second, the depression itself collects and retains more dense <br />cold air. In fact, a tiny temperature inversion may devel~~p in windless <br />conditions and a large temperature difference might well b~=_ anticipated <br />between the top of the quarry and the bottom of the pit. 'Phis presents <br />~~ a relatively harsh winter microclimate, but it is not anticipated that <br />it is any more harsh than would occur in the winter months on the north <br />S-K-4 <br />