9424 18TH AVE W 2018-01-02 MF Import

TABLE OFCONTENTS SECTION I - Project Overview ......................................................................................1 Generai Project Description :........................................................................................1 BasinDescription :........................................................................................................1 Stormwater Management Description :.........................................................................2 SECTION li - Existing Site Condition Summary ..........................................................3 SECTION III - Off-Site Analysis .....................................................................................4 SECTION IV - Analysis 8� Design Of Erosion And Sedimentation Control BMPs ....b SECTION V- Analysis & Design of Runoff Control ....................................................6 Proposed Developed Conditions ..................................................................................5 DownstreamAnalysis ..................................................................................................6 ExistingSite Summary .................................................................................................6 Post-Development Quantity Controi .............................................................................7 The Central Coie: Rain Gardens ........................................................................................ 7 Redundant Attenuation Provided by Compost Filter Berms .............................................. 19 Northem Tier. Runoff Dispersion and In(iltration ................................................................. Southern Tier. Runoff Dispersior, and Inliltration ........................................................ ...... 9 StorageStructure List ................................ ...............................................................10 RainGarden Storage ........................................................................................................ 10 Compost Filter Berm Storage ........................................................................................... 10 SECTION VI - Analysis 8� Design of Source Control BMPs ......................................11 GeneralSite Runoff ...................................................................................................11 SECTIOM VII - Special Reports & Studies .................................................................13 SECTIONVIII - Qther Parmits .....................................................................................13 SECTION IX - Miscellaneous Forms & Worksheets ..................................................13 SECTION X- Maintenance & Operations Requirements ..........................................17 RainGardens ................................................................................................................... 17 Compostfilter berms ........................................................................................................ 17 Bubole-up Distribution Basin ............................................................................................ 17 UnderdrainPipes .............................................................................................................. 18 CatchBasins .................................................................................................................... 18 DrivewayDiains ............................ .................................................................................. 18 Table of Figures Figure 1 - Vicinit Ma ...................................................3 Y P .................................................. Figure2- Existing Flow Paths ................................. .......................................................4 Figure 3- Developed 5ub-basin and Drainage Map ........................................................6 Figure 4- End-of-Aisle Rain Garden and Biofiitration Berms ........................................11 Figure 5- Typical South Tier Bubble-Up Basin and Yard Drainage ..............................12 Figure 6- Typical North Tii,i Yard Drainage ..................................................................13 - _ — -- ---- HEAF.THSTONE LANE p DRAINAGE PLAN