Laserfiche WebLink
Cischzrge at both ends of the channel ,+ould be approximately 550 c.f.s. <br /> <br />Ficure 5 is a design of the cross-section based on nuidelines set forth in <br />Chcw {1959)• Calculations are su-:•arized in Appendix III. Plate I sho,vs <br />the approximzte location of the channel. <br />The second element of the proposed drainage plan would be a storm <br />runoff system to handle flo,~5 venerated from the lower basin. This system <br />would reouire some modifications in er.isting Grades, etc. in order to safely <br />and efficiently dispose of the water. <br />Field inspection of lJestmoreland's Orchard Valley Fine site has <br />indica±ed that storm runoff is generated from four zones as shov,n by the <br />stipled, plain, and hatched areas in Figure 7~ <br />1. Zone 1 lies on the west side of the lover basin. The drainage <br />area includes the area above D bench, the D bench access road, <br />\J <br />6 bench and the area just belo,v the watershed boundary to the <br />west. Runoff from this area is generated from primarily undis- <br />turbed watershed and v:ou7d be discharged at node 1. <br />2. Zone 2 lies below the proposed upper basin diversion channel and <br />includes the air shaft bench. Runoff from this area r:ould be <br />discharged out of the watershed at node 7. <br />3. Zone 3 lies below the air shaft bench, includes D bench, and that <br />area above the old Converse Nine portals. P.unoff from zone 3 <br />would be collected and discharged from the watershed at node 10 <br />S. Zone 4 generates water from the remainder of the watershed, <br />including r:ost of the TLS bench, and is discharged at various <br />locations into the natural channel downstream. <br /> <br />