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<br /> <br />P. Hatthies: Portal #1 Reclamation Diversion page 3 <br />perpendicular to the flow path. These berms <br />function to disperse the flow and reduce the <br />velocity. <br />RUNOFF DIVERSION AWAY FROH RECLAIIiED PORTAL 1 <br />Based upon my site evaluation and subsequent calculations of the <br />hydraulic conditions around the reclaimed portal #1, the <br />following information is available: <br />A. The hydraulic environment of flows in the vicinity <br />of portal #1 is shown in Table 1 (detailed <br />calculations are in the Appendix). <br />Table 1. Reclaimed Portal #1 Hydraulics for 25-year <br />Design Storm <br />Location Depth Velocity Vel.,~ of <br />"Natural'! Shear <br />Stress Shear, $ of <br />"Natural" <br />"Natural" .34 ft 8.6 fps 100 4.7 #/f t= 100$ <br />Sec. A-A' .24 ft 6.5 fps 76$ 3.0 #/f t' 64$ <br />Sec. B-B' .28 ft 7.1 fps 838 3.4 #/f t' 72 <br /> <br /> <br />B. Flows in the diversion channel are directed away <br />from the reclaimed portal. No channel flows would <br />be across the reclaimed portal area and hence <br />there would not be a risk of erosion on the portal <br />face. <br />C. Flows around the reclaimed portal area are very <br />shallow, less than 0.5 ft. in all the sections <br />measured. <br />