Page 36 - 7166 - Rain Garden Handbook
P. 36

Build
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                          Rain Garden Cross Section



















                                                INFLOW—Water flowing off hard
                                                surfaces (for example a roof or
                                                driveway) can be delivered to
                                                the rain garden through a swale
                                                lined with decorative rock or
                                                plants, through a pipe, or across
                                                a landscaped area.





                                                           PONDING DEPTH             GRADUAL SIDE SLOPES               OVERFLOW
                                                           (6” or 12” typical)          (2:1 MAXIMUM)                 CONTAINMENT



                                                                        TOP SURFACE OF                 MULCH LAYER                     OVERFLOW
                                                                        PONDING AREA










                                                                                                                 1'
                                                                                                             2'
               Rain Garden Soil Mix Depth                              RAIN GARDEN SOIL MIX                                  EXISTING SOIL
               (12” to 24” Recommended)


                                                                       BOTTOM OF EXCAVATION
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