|1-yr 24-hr "Kerplunk" (K124)||1-yr 24-hr routed (R124)||1/2 Pre-development 2-yr 24-hr peak "Kerplunk" (R224)||1/2 Pre-development 2-yr 24-hr peak routed (R224)|
|Orifice diameter (inches)||10.5||6.9||10.0||11.6|
|Oriface elevation (ft)||105.0||105.0||105.0||105.0|
|Surface area at orifice elevation (ac)||0.6||0.6||0.6||0.6|
|Peak discharge per design event (cfs)||6.4||2.1||5.8||5.8|
|Peak water elevation per design event (ft)||107.9||108.2||108.7||108.5|
Note that the routed method for the 1-year design (R124) is much less than the kerplunk method (K124) due to the more constricted orifice.