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1 <br />1 <br />�1 <br />1 <br />1 <br />1 <br />1 <br />I <br />1 <br />1 <br />1 <br />1 <br />1 <br />planned for the project. This type of schedule guides the contractor on work to be done <br />before other work is started so that serious erosion and sedimentation problems can be <br />avoided. <br />Following a specified work schedule that coordinates the timing of land -disturbing activ- <br />ities and the installation of control measures is perhaps the most cost-effective way of <br />controlling erosion during construction. The removal of surface ground cover leaves a <br />site vulnerable to accelerated erosion. Construction procedures that limit land clearing <br />provide timely installation of erosion and sedimentation controls, and restore protective <br />cover quickly can significantly reduce the erosion potential of a site. <br />Design Considerations <br />. Minimize construction during rainy periods. <br />Schedule projects to disturb only small portions of the site at any one time. Com- <br />plete grading as soon as possible. Immediately stabilize the disturbed portion <br />before grading the next portion. Practice staged seeding in order to revegetate cut <br />and fill slopes as the work progresses. <br />11-4.2 Runoff Conveyance and Treatment BMPs <br />This section contains the standards and specifications for Runoff Conveyance and Treat- <br />ment BMPs. Table II-4.2.1 Runoff Conveyance and Treatment BMPs by SWPPP Ele- <br />ment (p.327), below, shows the relationship of the BMPs in II-4.2 Runoff Conveyance <br />and Treatment BMPs to the Construction Stormwater Pollution Prevention Plan <br />(SWPPP) Elements described in II-3.3.3 Step 3 - Construction SWPPP Development <br />and Implementation (p.236). <br />Table 11-4.2.1 Runoff Conveyance and Treatment BMPs by SWPPP <br />Element <br />Ele- <br />lement <br />Element <br />Ele- <br />ment <br />#4 <br />Ele- <br />Ele- <br />#8 Stab- <br />ment <br />Element <br />#3 <br />Install <br />ment <br />ment <br />ilize <br />Element <br />#10 <br />#13 Protect <br />BMP or Ele- <br />#7 Pro- <br />#9 Con- <br />Con- <br />Sed- <br />#6 Pro- <br />Chan- <br />Control <br />Low Impact <br />ment Name <br />tect <br />trol Pol- <br />trol <br />iment <br />tect <br />nels <br />De- <br />Devel- <br />Drain <br />lutants <br />Flow <br />Con- <br />Slopes <br />and Out <br />Water- <br />opment <br />Inlets <br />Rates <br />trols <br />lets <br />ing <br />BMP C200: <br />✓ <br />✓ <br />Interceptor <br />Dike and <br />Swale <br />2014 Stormwater Management Manual for Westem Washington <br />Volume 11 - Chapter 4 - Page 327 <br />