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4.6.15 stormwater report revision.pdf
Modification to Control Device (8" Daim. Riser) Western Washington Hydrology Model PROJECT REPORT Project Name: 5383 R3 Site Address: 8620 218th Street SW City Edmonds Report Date 4/5/2015 MGS Regoin Puget East Data Start 1939/10/1 Data End 2097/08/31 DOT Data Number: 03 WWHM3 Version: PREDEVELOPED LAND USE Name Basin 1 Bypass: No Groundwater: No Pervious Land Use C, Forest, Flat Impervious Land Use Element Flows To: Surface Name Basin 1 Bypass: No GroundWater: No Pervious Land Use C, Lawn, Flat Impervious Land Use ROADS FLAT ROOF TOPS FLAT DRIVEWAYS FLAT SIDEWALKS FLAT Element Flows To: Surface Vault 1, Vault 1, Acres 1.456 Acres Interflow Acres .776 Acres 0.143 0.388 0.102 0.047 Interflow Groundwater Original Acres 0.806 0.143 0.367 0.115 0.025 Groundwater MNATER CODE oc w. CCii'..SING M°: EPNIP'1TWIP'NP Ci I°S OF SM:)MNCr'61IDS Name Vault 1 Width 41.66 ft. Length 69.83 ft. Depth: 6.92ft. (As -Built) 6.90ft. (Designed) Discharge Structure Riser Height: 6.42 ft. (As -Built) 6.40. (Designed) Riser Diameter: 8 in. (As -Built) 12 in. (Designed) Notch Type V-notch Notch Angle : 90.000 Notch Height: 0.750 ft . (To be Modified) 0.500 ft. (Designed) Orifice 1 Diameter: 0.49 in. Elevation: 0 ft. Orifice 1 Diameter: 0.75 in. Elevation: 4.01 ft.(As-Built) 3.92ft.(Designed) Element Flows To: Outlet 1 Outlet 2 Vault Hydraulic Table Stage(ft) Area(acr) Volume(acr-ft) Dschrg(cfs) Infilt(efs) 0.000 0.067 0.000 0.000 0.000 0.077 0.067 0.005 0.002 0.000 0.154 0.067 0.010 0.002 0.000 0.231 0.067 0.015 0.003 0.000 0.308 0.067 0.021 0.003 0.000 0.384 0.067 0.026 0.004 0.000 0.461 0.067 0.031 0.004 0.000 0.538 0.067 0.036 0.005 0.000 0.615 0.067 0.041 0.005 0.000 0.692 0.067 0.046 0.005 0.000 0.769 0.067 0.051 0.006 0.000 0.846 0.067 0.056 0.006 0.000 0.923 0.067 0.062 0.006 0.000 1.000 0.067 0.067 0.006 0.000 1.076 0.067 0.072 0.007 0.000 1.153 0.067 0.077 0.007 0.000 1.230 0.067 0.082 0.007 0.000 1.307 0.067 0.087 0.007 0.000 1.384 0.067 0.092 0.007 0.000 1.461 0.067 0.098 0.008 0.000 1.538 0.067 0.103 0.008 0.000 1.615 0.067 0.108 0.008 0.000 1.692 0.067 0.113 0.008 0.000 1.768 0.067 0.118 0.008 0.000 1.845 0.067 0.123 0.009 0.000 1.922 0.067 0.128 0.009 0.000 1.999 0.067 0.134 0.009 0.000 2.076 0.067 0.139 0.009 0.000 2.153 0.067 0.144 0.009 0.000 2.230 0.067 0.149 0.009 0.000 2.307 0.067 0.154 0.010 0.000 2.384 0.067 0.159 0.010 0.000 2.460 0.067 0.164 0.010 0.000 2.537 0.067 0.169 0.010 0.000 2.614 0.067 0.175 0.010 0.000 2.691 0.067 0.180 0.010 0.000 2.768 0.067 0.185 0.010 0.000 2.845 0.067 0.190 0.011 0.000 2.922 0.067 0.195 0.011 0.000 2.999 0.067 0.200 0.011 0.000 3.076 0.067 0.205 0.011 0.000 3.152 0.067 0.211 0.011 0.000 3.229 0.067 0.216 0.011 0.000 3.306 0.067 0.221 0.011 0.000 3.383 0.067 0.226 0.012 0.000 3.460 0.067 0.231 0.012 0.000 3.537 0.067 0.236 0.012 0.000 3.614 0.067 0.241 0.012 0.000 3.691 0.067 0.246 0.012 0.000 3.768 0.067 0.252 0.012 0.000 3.844 0.067 0.257 0.012 0.000 3.921 0.067 0.262 0.012 0.000 3.998 0.067 0.267 0.013 0.000 4.075 0.067 0.272 0.016 0.000 4.152 0.067 0.277 0.018 0.000 4.229 0.067 0.282 0.020 0.000 4.306 0.067 0.288 0.021 0.000 4.383 0.067 0.293 0.022 0.000 4.460 0.067 0.298 0.023 0.000 4.536 0.067 0.303 0.024 0.000 4.613 0.067 0.308 0.025 0.000 4.690 0.067 0.313 0.026 0.000 4.767 0.067 0.318 0.027 0.000 4.844 0.067 0.324 0.027 0.000 4.921 0.067 0.329 0.028 0.000 4.998 0.067 0.334 0.029 0.000 5.075 0.067 0.339 0.029 0.000 5.152 0.067 0.344 0.030 0.000 5.228 0.067 0.349 0.031 0.000 5.305 0.067 0.354 0.031 0.000 5.382 0.067 0.359 0.032 0.000 5.459 0.067 0.365 0.033 0.000 5.536 0.067 0.370 0.033 0.000 5.613 0.067 0.375 0.034 0.000 5.690 0.067 0.380 0.034 0.000 5.767 0.067 0.385 0.042 0.000 5.844 0.067 0.390 0.068 0.000 5.920 0.067 0.395 0.119 0.000 5.997 0.067 0.401 0.198 0.000 6.074 0.067 0.406 0.310 0.000 6.151 0.067 0.411 0.459 0.000 6.228 0.067 0.416 0.647 0.000 6.305 0.067 0.421 0.878 0.000 6.382 0.067 0.426 1.155 0.000 6.459 0.067 0.431 1.360 0.000 6.536 0.067 0.436 1.566 0.000 6.612 0.067 0.442 1.859 0.000 6.689 0.067 0.447 2.219 0.000 6.766 0.067 0.452 2.635 0.000 6.843 0.067 0.457 3.100 0.000 6.920 0.067 0'462 3'609 0.000 6.997 0.067 0'405 4'I58 0.000 morzoAToo zAmo USE ANALYSIS RESULTS Flow Frequency Return Return Period 2 year 5 year zO year 25 year 50 year 100 year Periods for Predavmlopod. PoC #1 �ow(cnz fs) O,024]5 O-O40DI O'04O836 0-O580O3 O-0655]I 0.068116 Flow Frequency metnzo Periods for Mitigated Return Period Flow(cfs) o year 0'0I2557 5 year 0,020456 10 year 0-027853 25 year 0'04040I 50 year 0'05263I 100 year 0.06788I Yearly Peaks for eredevalpped and Mitigated 1941 0'034 0.0I1 1942 O'OII 0-008 1943 0-025 0.0I0 1944 0.0I3 0'0I2 I945 0-005 0-007 I946 0-038 0'0I2 1947 0-024 0'0I0 I948 0-026 O'OIO 1949 0.042 0-0II I950 0.022 0.011 1951 0.087 0-0I3 1952 0.036 0'023 1953 0.008 0-008 1954 0.0I2 0'0I2 1955 0.020 0'010 1956 0.009 0-009 1957 0.023 0.025 1950 0.0I7 0.0I0 1959 0.022 O-OII 1960 0.023 0'0I2 1961 0^026 U'OII 1952 0.03I 0-0I7 1963 0.0I2 0.009 1964 0.01.1- 0.009 1965 0.020 0,009 1966 O.027 0.0I0 I967 0.018 0,01I I968 0-04I 0-0I3 1969 0.023 0.0II I970 0.822 0.011 1971 O'OId 0-0I2 1972 0.019 0.012 1973 0.055 0-034 1974 0.0I9 0-023 1975 0-032 0-0I2 1976 0.026 0-0I0 1977 0'026 0-012 1978 0-00I 0,009 1979 0-020 0'012 1980 0-02I 0^0I0 1981 0.032 0-046 1982 U-OIO O-OII 1983 0-029 0-024 1984 0-023 0.012 1985 0-020 0.0I0 1986 0-015 0-009 1987 0-050 0.0I2 1988 0.041 0,025 1989 0.022 0-0II 1990 0.026 0-0I2 I99I 0-080 O-O]I 1992 0.064 0-032 1993 0.0I9 0'0I2 1994 0'0I6 0-009 1995 0'0II 0'0I0 1996 0-028 0,012 1997 0-068 0-056 I998 O.U&O 0-035 1999 0-0I4 0'0I0 2000 0.04I 0-033 200I 0-02I 0.0I2 2002 0-009 0'009 2003 0,015 0-009 2004 0-049 0.030 2005 0,009 0-009 2006 0.0I9 0.009 2007 0-025 0,0I2 2008 0.0I7 0-0II 2009 0.028 0,012 20I0 0.052 0-033 2011 0.035 0-012 20I2 0-038 0-024 2013 0-023 O'OII 2014 0-057 0.045 20I5 0.025 0-01I 20I6 0-0I5 0-010 20I7 0-047 0-032 20I8 0-0I2 0-0I0 2019 0.023 O-OII 2020 0.024 0'0I2 202I 0-016 0.0I0 2022 0-039 0-020 2023 0.010 0'0I0 2024 0-023 0,0I1 2025 0-018 0-0I2 2026 0.039 0.030 2027 0.029 0'021 2028 0-023 0.010 2029 0.029 0.0I2 2030 0.022 0-0I1 2031 0-034 0,027 2032 0-028 0.012 2033 0-049 0.013 2034 0-012 0.010 3035 0-056 O-O&O 2036 0-025 O-UII 2037 0-024 0.0I2 2038 0.000 0.006 2039 0.0I0 0,0I2 3040 0.0I3 0-009 204I 0.040 O-OIl 2042 0-026 0-0I2 2043 0-028 0-0I2 2044 0-037 0.0I2 2045 0-0I6 0.011 2046 0-0I9 O-OII 2047 0'025 O-OII 2048 0.0I5 0.010 2049 0-0I2 0-0I6 2050 0-015 0-0II 205I 0-02I O-OIO 2052 0.0I8 O'OIO 2053 0-0I2 0-009 2054 0-044 0,009 3055 0-007 0,009 2056 0-04I 0.026 2057 0.075 0-I5I 2058 0-078 0-022 2059 0-024 O-OII 2060 0-032 0-023 206I O-OII O-UIO 2062 0-027 0-0I2 2003 0.096 0'8II 2064 0-02I 0-0I2 2005 0.038 0-020 2056 0.0I6 0.0II 2057 0.008 0-008 2068 0.027 0-022 2069 0-054 0.026 2070 0-0I4 8-008 207I O-OII 0-008 2072 0-0I2 0-009 2073 0-014 0'009 2074 0-060 0-I30 2075 0-031 0-0I2 2076 0-005 0,009 2077 0.033 0'0I2 2078 0-002 0,007 2079 0.011 0.011 2080 0.016 0-009 2081 0.062 0'060 2082 0.027 0'024 2083 0.038 0'025 2084 0.033 0-022 2085 0.027 0'030 2086 0'0I7 0.0I2 2087 0-024 0-0I0 2088 0-022 0'0I2 2089 0'0I4 0.010 2090 0.024 0'0I2 209I 0.014 O-UII 2092 0.034 0'03I 2093 0'037 0'025 2094 0'009 O'OOg 2095 0,009 0,009 2096 0-0I5 0'012 2097 0-0I9 0'0I2 2098 0'044 0-02I Ranked Yearly Peaks for Rank eredaneloped I 2 3 4 5 6 7 8 9 IO II 12 13 14 15 IG 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 3] 54 35 O'0960 O'O868 0.0804 O-0775 O-075I 0.0683 0.0635 0.0623 0.0596 O'O568 O-056I 0-O55I O'O542 0.0524 0.0501 0.0495 0.0493 0.0472 D'O44O O'O439 O-0422 O-04I2 O-U4II 0.0410 0.0410 0.0402 0.O«O0 0'O394 O'039] 0-O384 0.0380 0.0375 0.0375 0.0372 0.0365 Predeveloped and Mitigated O'I5I3 U'I3OO O-O6UO O-O555 O-O462 0'OA47 0-O4O0 0'0347 O'O34I 0'O333 O-0327 0-O]2O 0'0]I9 0'O3I8 O-03I2 0-03O5 O'O3OJ 0.0299 0'O296 O'O268 0-O363 O'0259 O'O254 0.0253 O-O252 0'O250 O.02&4 O-O24l 0'O238 0.0232 0'U227 O'022O O-O2I9 0-02I6 0.0212 Mitigated. Poo #1 0-0362 0-0209 0.0340 0-020I 0-0337 8-0I97 0-0334 8-0I66 0.033I 0-0I60 0-0324 0-0I26 0.0318 0'0I26 0.03I6 0-0I25 0.0305 0-0125 0.0293 0'0I35 0.0291 0-0I25 0.0288 0,0I25 0.0283 0^0124 0-0280 0.0124 0.0279 0-0124 0^0278 0-0I24 0-0272 0-0I24 0-0268 0,0123 0,0265 0.0123 0.0265 0-0I23 0-0265 0-0I23 0.0263 0,0I22 0-026I 0-0I22 0-0250 0.0122 0-0260 0-0I2I 0-0359 0-0I2I 0-0257 0-0I2I 0-0254 0.0I20 0-0252 0.0I20 0.0249 0-0I20 0.0248 0.0120 0-0247 0-0I20 0.0243 0.0I20 0.0241 0.0I20 0-0240 0-0II9 0-0239 0-01I9 0-0239 0.0II9 0.0237 0.0II8 0.0236 0-0II8 0-0235 0-0II7 0'0234 0-0II6 0-0232 0-0II6 0-023I 0-01I6 0-0230 0-0II6 0-0228 0-0II5 0-0228 0-0II4 0.0226 0^0I14 0-0226 0-01I4 0-0225 0-0II3 0-0224 0-0II3 0.0224 0'0II2 0-0222 0.0II2 0.02I7 0.0II1 0-02I6 0-01II 0'02I0 O-OIII 0.02I0 O'OIII 0-0208 0.0I10 93 0'0208 0'0II0 94 0'0208 O'OIIU 95 0.0204 0'0I09 96 0.020I 0.0I09 97 0.0I99 0-0I09 98 0.0I99 0,0I08 99 0-0192 0,0I08 I00 0'0I89 0'0I08 IOI 0'0I88 0.0I07 102 0.0I87 0.0I07 IO] 0.0I86 0,0I07 104 0.0I85 0'0I06 I05 0-0I84 0'0I05 106 0'0I84 0'0105 I07 0.0177 0'0I05 I08 0.0176 0'0I05 I09 0.0175 0.0I04 lIO 0.0I73 0.0I03 III 0.0I70 0.0103 112 0.0I65 0-0I03 113 0.0I65 0'0I03 114 0-016I 0.0IO2 115 0'0I60 O'OIOI 116 0'0150 0.0I0I I17 0'0I59 0-0I0I 118 0.0I55 0'0I0I 119 0.0I53 0-0I0I I20 0.0152 0.0100 121 0.0I5I 0'0I00 122 0.0148 0'0099 123 0-0I45 0-0097 124 0'0I44 0'0095 125 0'0I43 0-0096 126 0'0I4I 0'0096 127 0.0I40 0,0096 128 0.0I38 0,0096 129 0.0I3I 0'0095 I30 0-0I26 0'0094 131 0'0I25 0-0094 132 0'0I34 0'0093 I53 0,0I20 0-0093 134 0'0I19 0'0092 135 0.0II9 0'0092 136 0.01I7 0'0092 137 0.0II6 0'009I 138 0'0II3 0.0090 139 0,0II0 0.0090 140 U'OIIO 0,0089 I«I 0-0I09 0-0089 142 0.0I08 0'0089 143 0.0I05 0'0089 144 0.0I0I 0-0088 145 0.0101 0-0087 146 0'0095 0.0086 147 0-0094 0-0086 148 0-0093 0-0085 149 0'0093 0'0085 150 0.0087 0.0084 151 0.0084 0.0083 152 0.0078 0.0083 153 0.0066 0.0083 154 0.0051 0.0082 155 0.0050 0.0076 156 0.0020 0.0073 157 0.0012 0.0070 158 0.0003 0.0063 Poc #1 The Facility PASSED The Facility PASSED. Flow(CFS) Predev Dev Percentage Pass/Fail 0.0122 13774 10568 76 Pass 0.0127 12593 6422 50 Pass 0.0132 11483 6234 54 Pass 0.0137 10510 6074 57 Pass 0.0142 9661 5912 61 Pass 0.0148 8887 5775 64 Pass 0.0153 8194 5620 68 Pass 0.0158 7563 5483 72 Pass 0.0163 7005 5352 76 Pass 0.0168 6481 5147 79 Pass 0.0174 6001 4918 81 Pass 0.0179 5503 4721 85 Pass 0.0184 5097 4523 88 Pass 0.0189 4711 4322 91 Pass 0.0194 4369 4105 93 Pass 0.0200 4035 3902 96 Pass 0.0205 3727 3680 98 Pass 0.0210 3459 3457 99 Pass 0.0215 3214 3213 99 Pass 0.0220 2990 2983 99 Pass 0.0225 2796 2789 99 Pass 0.0231 2605 2616 100 Pass 0.0236 2453 2434 99 Pass 0.0241 2283 2268 99 Pass 0.0246 2146 2117 98 Pass 0.0251 2014 1946 96 Pass 0.0257 1897 1782 93 Pass 0.0262 1790 1613 90 Pass 0.0267 1682 1480 87 Pass 0.0272 1596 1351 84 Pass 0.0277 1519 1227 80 Pass 0.0283 1429 1121 78 Pass 0.0288 1366 1028 75 Pass 0.0293 1282 928 72 Pass 0.0298 1217 827 67 Pass 0.0303 1152 718 62 Pass 0.0308 1082 627 57 Pass 0.0314 1039 546 52 Pass 0.0319 984 463 47 Pass 0.0324 944 406 43 Pass 0.0329 904 357 39 Pass 0.0334 861 303 35 Pass 0.0340 836 243 29 Pass 0.0345 800 190 23 Pass 0.0350 775 176 22 Pass 0.0355 747 164 21 Pass 0.0360 717 159 22 Pass 0.0366 680 152 22 Pass 0.0371 652 146 22 Pass 0.0376 623 141 22 Pass 0.0381 588 135 22 Pass 0.0386 561 133 23 Pass 0.0391 536 128 23 Pass 0.0397 510 120 23 Pass 0.0402 487 ill 22 Pass 0.0407 465 106 22 Pass 0.0412 445 97 21 Pass 0.0417 432 89 20 Pass 0.0423 407 84 20 Pass 0.0428 396 76 19 Pass 0.0433 376 74 19 Pass 0.0438 359 71 19 Pass 0.0443 339 67 19 Pass 0.0449 322 65 20 Pass 0.0454 311 62 19 Pass 0.0459 297 61 20 Pass 0.0464 283 58 20 Pass 0.0469 267 56 20 Pass 0.0474 251 54 21 Pass 0.0480 247 53 21 Pass 0.0485 232 51 21 Pass 0.0490 218 50 22 Pass 0.0495 206 49 23 Pass 0.0500 197 46 23 Pass 0.0506 183 45 24 Pass 0.0511 173 42 24 Pass 0.0516 165 42 25 Pass 0.0521 152 41 26 Pass 0.0526 139 40 28 Pass 0.0532 128 39 30 Pass 0.0537 116 38 32 Pass 0.0542 110 38 34 Pass 0.0547 98 37 37 Pass 0.0552 89 33 37 Pass 0.0557 82 32 39 Pass 0.0563 78 31 39 Pass 0.0568 72 31 43 Pass 0.0573 70 29 41 Pass 0.0578 64 29 45 Pass 0.0583 59 28 47 Pass 0.0589 55 27 49 Pass 0.0594 49 26. 53 Pass 0.0599 41 26 63 Pass 0.0604 39 24 61 Pass 0.0609 35 24 68 Pass 0.0615 32 24 75 Pass 0.0620 30 24 80 Pass 0.0625 28 24 85 Pass 0.0630 26 24 92 Pass 0.0635 23 22 95 Pass Water Quality BMP Flow and Volume for ROC 1, On-line facility volume: 0.0214 acre-feet On-line facility target flow: 0.01 cfs. Adjusted for 15 min: 0.0114 cfs. Off-line facility target flow: 0.0073 cfs. Adjusted for 15 min: 0.0077 cfs. Per1nd and Imp1nd Changes No changes have been made. This program and accompanying documentation is provided 'as -is' without warranty of any kind. The entire risk regarding the performance and results of this program is assumed by the user. Clear Creek Solutions and the Washington State Department of Ecology disclaims all warranties, either expressed or implied, including but not limited to implied warranties of program and accompanying documentation. In no event shall Clear Creek Solutions and/or the Washington State Department of Ecology be liable for any damages whatsoever (including without limitation to damages for loss of business profits, loss of business information, business interruption, and the like) arising out of the use of, or inability to use this program even if Clear Creek Solutions or the Washington State Department of Ecology has been advised of the possibility of such damages.