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1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />Figure 11-4.2.2 Temporary Channel Liners <br />Overlap 6" <br />(150mm) minimum <br />Excavate channel <br />to design grade <br />and cross section Longitudinal <br />Design Depth anchor trench <br />Overcut channel 2'(50mm) to allow <br />bulking during seedbed preparation <br />Typical installation with <br />erosion control blankets <br />or turf reinforcement mats <br />6' <br />Intermittent Check Slot Longitudinal Anchor Trench <br />Shingle -lap spliced ends or begin <br />new roll in an intermittent check slot <br />3: <br />Prepare soil and apply seed before 0 <br />j <br />installing blankets, mats, or other U <br />temporary channel liner system <br />Notes: <br />1. Design velocities exceeding 2 ft/sec (0.5 <br />m/sec) require temporary blankets, mats, <br />or similar liners to protect seed and soil <br />until vegetation becomes established. <br />2. Grass -lined channels with design velocities <br />exceeding 6 ft/sec (2 m/sec) should include <br />turf reinforcement mats. NOT TO SCALE <br />Figure 11 -4.2.2 <br />Temporary Channel Liners <br />DEPARTMENT OF Revised July 2015 <br />ECOLOGYPlease see http.-Ilwww.ecy.wa.govlcopyright.htmI for copyright notice including permissions, <br />State of Washington limitation of liability, and disclaimer. <br />2014 Stormwater Management Manual for Western Washington <br />Volume 11 - Chapter 4 - Page 337 <br />