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<br />Il <br />[1 <br />[] <br /> <br />n <br /> <br />(] <br />f1 <br />f) <br />II <br />n <br />LJ <br />[] <br />II <br />U <br />II <br />U <br />U <br /> <br />u <br /> <br />II <br />l J <br /> <br />.' <If..') [I \'r? ' f:., <br />, ., 'I I 0\ 3 I . <br />\ ':" j ; -''' ~'.: <br />'0; , .,j'. '\ \ \ <br />\ .,,;,/ 'i Y /} I. ; <br /> <br />ENGrNEl:PINu,INC <br /> <br />PROJECT: Bella Vista Park <br />PROJECT NO,: 1019 <br />FILE NO: 10199 BASIN <br />COMPUTED B'v M.F.. DATE: <br />CHECKED BY: O.S, DATE: <br /> <br />500 1 SW 174 Court Suite 201. <br />MIami. Florida 33155 <br />Tel: (305) 662-8887 <br />Fax: (305) 662-8858 <br /> <br />03/31/11 <br /> <br /> <br />GIVEN: <br /> <br />RAINFALL FREQUENCY <br />TOTAL AREA <br />IMPERVIOUS AREA <br />PERVIOUS AREA <br />IMPERV, COEFFICIENT <br />PERVIOUS COEFFICIENT <br />RUNOFF COEFFICIENT (C) <br />DESIGN WATER TABLE (October) <br />FLOOD CRITERIA <br />INLET GRATE ELEVATION <br />TRENCH BOTTOM ELEV. <br />PVMNT SECTION DEPTH <br />SAFETY FACTOR <br />HYDRAULIC CONDUCTIVITY AVG. (K) <br />(SEE ATTACHED TESTS) <br />WIDTH bottom = <br />TRENCH SLOPE =1 VERT. TO <br />INVERT PIPE ELEVATION <br />DRAINAGE PIPE DIAMETER <br /> <br />5.00 [YEARS] <br />0,37 [ACRES] <br />0,22 [ACRES] <br />0.15 [ACRES] <br />~[CONST] <br />~[CONST] <br />0.66 [CONST] <br />~.oo [FEET ABOVE NGVD] <br />5.00 [FEET ABOVE NGVD] <br />2.90 [FEET ABOVE NGVD, LOWEST] <br />-12,10 [FEET, NGVD] <br />1.50 [FEET] <br />2.00 [CONST](a safety factor of 2 is built in to the formula) <br />1.88E-04 [CFS/SF/FT OF HEAD] <br /> <br />3.00 [FEET] <br />0.00 [HORZ,] <br />-0,85 [FEET ABOVE NGVD, LOWEST] <br />1.25 [FEET] <br /> <br />CALCULATED <br /> <br />H2= <br />Du = <br />Ds= <br />Wavg = <br />STORAGE AREA = <br />Saturated condition STORAGE VOLUME = <br />Q/LF = k((2 H2 Du)-(Du)^2+(2 H2 Ds))+.000139WDu ACTUAL Q/LF = <br />DESIGN Q/LF = <br /> <br />0.9 FT <br />-0.6 FT <br />14.1 FT <br />3FT <br />-0,90 SF <br />-0,90 CU,FT./L.F, <br />0.004 CFS/L.F OF TRENCH <br />0.002 CFS/L.F OF TRENCH <br /> <br />TOTAL TRENCH LENGTH = <br />TOTAL NUMBER OF INLETS = <br /> <br />~LF <br />~EA <br /> <br />MINIMUM TRENCH LENGTH PER INLET = <br />TOTAL STORAGE VOLUME (S) = <br />ACTUAL EXFILTRATION = <br />DESIGN EXFILTRATION = <br /> <br />40 LF <br />-144.00 CU,FT. <br />0.68 CFS <br />0,34 CFS <br />