Laserfiche WebLink
CITY OF EVERETT STORMWATER MANAGEMENT MANUAI <br /> 8. Guidcline for Spacing: ( ' <br /> Slope% Spacing(R) <br /> �5 125 <br /> 5- 10 100 <br /> 10-20 75 <br /> 20-35 50 <br /> >35 Use rock lined ditch <br /> Maintenance Standards <br /> I. Periodically inspect right-of-way diversions Cor wear and afler every heavy rainfall for crosion <br /> damagc <br /> 2. Immediately remove sediment Rom thc flow area and repair the dike <br /> 3. Check outlet areas and make timely repairs as needcd <br /> 4. When pertnanent road drainage is established and the arca above the temporary rightof-way <br /> divcrsion is pertnanently stabilized,remove the dike and fill the channel to blend with the natural <br /> ground, and appropriately stabilize the disturbed area. <br /> 3.3.5 BMP C204: Pipe Slope Orains <br /> Purpose <br /> Ta use a pipe to convey storrowater anytime water necds to be diverted away from or over hare soil to � <br /> prevent gullies,ehannel erosion,and saturation of slide-prooc soils. <br /> Conditions of Use <br /> Pipe slope drains should be used when a temporary c,r permanent stocmwater conveyance is needed to <br /> move the water down a steep slope to avoid erosion. See DCSS Drawing#205. <br /> On highway projects,they should be used at bridge ends to collect nmoff and pipe it to the 6ase of the fill <br /> slopes along bridge approaches. Thcse can be designtd into a project and included as bid items. <br /> Mother use on road projects is to collcct runoff From pavemcnt and pipc it away from sidc slopcs. These <br /> are uscful becausc there is gencrally a:ime lag betwcen having thc first IiR uf asphalt installed and the <br /> curbs,guncrs,and permanent drainagc installcd. Uscd in conjunction with sand bags,or othor temporary <br /> divcrsion dcviccs,these will pcevcnt massive amounts of sediment from Icaving a project <br /> Water can be collccted,channelcd with sand bags,Triangular Silt Dikcs,bcrtns,or other malcrial,and <br /> piped to temporary sedimcnt ponds. <br /> Pipe slope drains can bc: <br /> 1. Connected to new catch basins and used temporarily wtil all pemanent�iping is insta:led. <br /> 2. Used to drain water collcctcd Crom aquifcrs cxposcd on cut slopes and takc it to the base of the <br /> slopc. <br /> 3. Used to collect clean runoff from plastic sheeting and direct it away from exposed soil. <br /> 4. Installed in conjunction with silt fence to drain collected water to a controlled arca. <br /> Volume II—Consfruction StormwaterPoliution Prevention <br /> 3-41 <br />