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ACTUAL PEAK DISCHARGE (CFS) 4.4 <br />"V" Ditch <br />Width (ft) 3.0 <br />Depth (ft) <br />3.0 <br />• Flow Depth (ft) <br />1.3 <br />Freeboard (ft) <br />1.7 <br />Sideslopes(ft:ft) <br />1:1 <br />Ditch Slope ( %) <br />1.0 <br />Velocity (fps) <br />2.6 <br />DITCH CALCULATIONS <br />Peak Flow = 4.4 cfs <br />Use "V" Ditch <br />Z = 1:1 Sideslopes <br />S = 1% Slope <br />N = 0.035 <br />Q= AV- 1.49R <br />n <br />Q = AV = 1.49 Zd"' (S)/" (Zd) <br />0.035 2Z' +1 <br />4.4=42.57 d (0.01) <br />2.8 <br />1.034 = d "' d <br />2.8 <br />. l o w 1.3 ft <br />F Depth Flow Depth = 1.3 ft <br />Freeboard = 1.7 ft <br />Ditch Depth = 3.0 ft <br />Q =AV <br />V = Q/A = 4.4 /Zd <br />= 4.4/(1)(1.3) <br />= 2.6 fps <br />No further sediment control is proposed for this area other than controlling overland flow with the diversion ditch. <br />Based upon the track alignment, approximately 500 CY' were excavated during the cut and fill process. The fill <br />material was compacted per the requirements of the UP. Cut and fill slopes were seeded with the pastureland seed <br />mixture to stabilize the slopes until they are reclaimed. <br />After the cut and fill work was completed, approximately 200 CY of pit -run gravel was hauled in and used for <br />roadbed. The tie and rails were laid, and approximately 200 CY of ballast was placed to anchor the ties. A <br />deadman or berm was constructed at the end of the extension. Runoff from the site was intercepted by a silt fence <br />during construction, the area was revegetated, and a ditch cut was established around the topsoil stockpile to direct <br />any runoff from it into the silt fence. <br />When the railroad spur is no longer needed, the original track and extension will be removed and the area <br />reclaimed. Specifically for the extension, the ties and rail will be removed and then the fill material will be used to <br />backfill the cut areas. The combined 400 CY of the ballast and pit -run gravel will also be used as back &11. The <br />following paragraph applies to the extension of the railroad behind Pinnacle Peak. <br />TR06 -53 2.05 -36 06/20/06 <br />