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response letter 5-18-17.pdf May 18, 2017 Jeanie McConnell, Engineering Program Manager The City of Edmonds 121 5th Ave N Edmonds, WA 98020 PLN20170017 Design Review for 11-Unit Development Re: th Mietzner Brothers Properties 8609 244 St SW IECO No. 16-0800 Dear Ms. McConnell, The project referenced above is revised in response to the review comments dated May 16, 2017. Based upon the review comments regarding the discharge points of the proposed project, the proposed redesign incorporates infiltration to fully infiltrate the runoff from the site by the means of permeable pavement. Flow control, water quality and onsite stormwater management requirements will be met by providing infiltration through the permeable pavement, subsequent aggregate and underlaying soil layers. The permeable pavement was designed in recommended by the geotechnical engineer was 0.25 iph. The pavement section recommended by the geotechnical engineer i -- the roof will be connected to the gravel subbase to infiltrate underneath the permeable. The proposed project will no longer divert the basin runoff. The overflow for the infiltration trench will be connected to a dispersion trench to flow north to continue the natural drainage path of the site. The WWHM analysis uses the Puget East 36 rainfall data. Refer to the following pages for the WWHM report. Please feel free to contact me with any questions or comments you may have. Sincerely, Brian Kalab PE, Project Manager PO Box 1478 Everett, WA 98206 Phone: (425) 303-9363 Fax: (425) 303-9362 Email:info@insightengineering.net Total Site Area = 0.90Acres Total Area Included in the Analysis = 0.68 Arces The area included in the analysis will be the area where the new impervious is proposed. From the Soil Conservation Service Map of Snohomish County, the majority of the site contains Error! Reference source not found. . Existing Basin Summary Existing Basin = 0.68 Acres Total area included in the analysis =0.68 Acres Entire existing basin was modeled as forested areas. Refer to the Existing Basin Map and the following pages for more details. Developed Basin Summary Developed Basin = 0.68 Acres Total area included in the analysis =0.68 Acres Refer to the Developed Basin Map for representation. Impervious: Roof Area = 0.44 Acres (19,117 SF) Sidewalk = 0.02 Acres (566 SF) Road (Permeable Paving) = 0.22 Acres ( 9,737 SF) Total Existing Impervious = 0.68 Acres (29,420 SF) PO Box 1478 Everett, WA 98206 Phone: (425) 303-9363 Fax: (425) 303-9362 Email:info@insightengineering.net WWHM2012 PROJECT REPORT ___________________________________________________________________ Project Name: 244th St Perm Pav Site Name: 244th St Site Address: 8609 244th SW City : Edmonds Report Date: 5/18/2017 MGS Regoin : Puget East Data Start : 1901/10/1 Data End : 2058/09/30 DOT Data Number: 03 Version Date: 2016/02/25 Version : 4.2.12 ___________________________________________________________________ Low Flow Threshold for POC 1 : 50 Percent of the 2 Year ___________________________________________________________________ High Flow Threshold for POC 1: 50 year ___________________________________________________________________ PREDEVELOPED LAND USE Name : Ex Bypass: No GroundWater: No Pervious Land Use acre C, Forest, Flat .68 Pervious Total 0.68 Impervious Land Use acre Impervious Total 0 Basin Total 0.68 ___________________________________________________________________ Element Flows To: Surface Interflow Groundwater ___________________________________________________________________ MITIGATED LAND USE Name : Permeable Pavement Pavement Area: 0.2237 ft. Pavement Length: 406.00 ft. Pavement Width: 24.00 ft. PO Box 1478 Everett, WA 98206 Phone: (425) 303-9363 Fax: (425) 303-9362 Email:info@insightengineering.net Pavement slope 1: 0.02 To 1 Pavement thickness: 0.33 Pour Space of Pavement: 0.3 Material thickness of second layer: 1.33 Pour Space of material for second layer: 0.4 Material thickness of third layer: 0 Pour Space of material for third layer: 0 Infiltration On Infiltration rate: 0.25 Infiltration safety factor: 1 Wetted surface area On Total Volume Infiltrated (ac-ft.): 250.939 Total Volume Through Riser (ac-ft.): 0 Total Volume Through Facility (ac-ft.): 250.939 Percent Infiltrated: 100 Total Precip Applied to Facility: 0 Total Evap From Facility: 8.357 Element Flows To: Outlet 1 Outlet 2 ___________________________________________________________________ Permeable Pavement Hydraulic Table Stage(feet) Area(ac.) Volume(ac-ft.) Discharge(cfs) Infilt(cfs) 0.0000 0.223 0.000 0.000 0.000 0.0162 0.223 0.001 0.000 0.056 0.0324 0.223 0.002 0.000 0.056 0.0487 0.223 0.004 0.000 0.056 0.0649 0.223 0.005 0.000 0.056 0.0811 0.223 0.007 0.000 0.056 0.0973 0.223 0.008 0.000 0.056 0.1136 0.223 0.010 0.000 0.056 0.1298 0.223 0.011 0.000 0.056 0.1460 0.223 0.013 0.000 0.056 0.1622 0.223 0.014 0.000 0.056 0.1784 0.223 0.016 0.000 0.056 0.1947 0.223 0.017 0.000 0.056 0.2109 0.223 0.018 0.000 0.056 0.2271 0.223 0.020 0.000 0.056 0.2433 0.223 0.021 0.000 0.056 0.2596 0.223 0.023 0.000 0.056 0.2758 0.223 0.024 0.000 0.056 0.2920 0.223 0.026 0.000 0.056 0.3082 0.223 0.027 0.000 0.056 0.3244 0.223 0.029 0.000 0.056 0.3407 0.223 0.030 0.000 0.056 0.3569 0.223 0.031 0.000 0.056 0.3731 0.223 0.033 0.000 0.056 0.3893 0.223 0.034 0.000 0.056 0.4056 0.223 0.036 0.000 0.056 0.4218 0.223 0.037 0.000 0.056 0.4380 0.223 0.039 0.000 0.056 0.4542 0.223 0.040 0.000 0.056 PO Box 1478 Everett, WA 98206 Phone: (425) 303-9363 Fax: (425) 303-9362 Email:info@insightengineering.net 0.4704 0.223 0.042 0.000 0.056 0.4867 0.223 0.043 0.000 0.056 0.5029 0.223 0.045 0.000 0.056 0.5191 0.223 0.046 0.000 0.056 0.5353 0.223 0.047 0.000 0.056 0.5516 0.223 0.049 0.000 0.056 0.5678 0.223 0.050 0.000 0.056 0.5840 0.223 0.052 0.000 0.056 0.6002 0.223 0.053 0.000 0.056 0.6164 0.223 0.055 0.000 0.056 0.6327 0.223 0.056 0.000 0.056 0.6489 0.223 0.058 0.000 0.056 0.6651 0.223 0.059 0.000 0.056 0.6813 0.223 0.061 0.000 0.056 0.6976 0.223 0.062 0.000 0.056 0.7138 0.223 0.063 0.000 0.056 0.7300 0.223 0.065 0.000 0.056 0.7462 0.223 0.066 0.000 0.056 0.7624 0.223 0.068 0.000 0.056 0.7787 0.223 0.069 0.000 0.056 0.7949 0.223 0.071 0.000 0.056 0.8111 0.223 0.072 0.000 0.056 0.8273 0.223 0.074 0.000 0.056 0.8436 0.223 0.075 0.000 0.056 0.8598 0.223 0.076 0.000 0.056 0.8760 0.223 0.078 0.000 0.056 0.8922 0.223 0.079 0.000 0.056 0.9084 0.223 0.081 0.000 0.056 0.9247 0.223 0.082 0.000 0.056 0.9409 0.223 0.084 0.000 0.056 0.9571 0.223 0.085 0.000 0.056 0.9733 0.223 0.087 0.000 0.056 0.9896 0.223 0.088 0.000 0.056 1.0058 0.223 0.090 0.000 0.056 1.0220 0.223 0.091 0.000 0.056 1.0382 0.223 0.092 0.000 0.056 1.0544 0.223 0.094 0.000 0.056 1.0707 0.223 0.095 0.000 0.056 1.0869 0.223 0.097 0.000 0.056 1.1031 0.223 0.098 0.000 0.056 1.1193 0.223 0.100 0.000 0.056 1.1356 0.223 0.101 0.000 0.056 1.1518 0.223 0.103 0.000 0.056 1.1680 0.223 0.104 0.000 0.056 1.1842 0.223 0.106 0.000 0.056 1.2004 0.223 0.107 0.000 0.056 1.2167 0.223 0.108 0.000 0.056 1.2329 0.223 0.110 0.000 0.056 1.2491 0.223 0.111 0.000 0.056 1.2653 0.223 0.113 0.000 0.056 1.2816 0.223 0.114 0.000 0.056 1.2978 0.223 0.116 0.000 0.056 1.3140 0.223 0.117 0.000 0.056 1.3302 0.223 0.118 0.000 0.056 1.3464 0.223 0.119 0.000 0.056 1.3627 0.223 0.120 0.000 0.056 PO Box 1478 Everett, WA 98206 Phone: (425) 303-9363 Fax: (425) 303-9362 Email:info@insightengineering.net 1.3789 0.223 0.121 0.000 0.056 1.3951 0.223 0.123 0.000 0.056 1.4113 0.223 0.124 0.000 0.056 1.4276 0.223 0.125 0.000 0.056 1.4438 0.223 0.126 0.000 0.056 1.4600 0.223 0.127 0.000 0.056 ___________________________________________________________________ Name : Roof Bypass: No Impervious Land Use acre ROOF TOPS FLAT LAT 0.44 ___________________________________________________________________ Element Flows To: Outlet 1 Outlet 2 Permeable Pavement ___________________________________________________________________ Name : Sidewalk Bypass: No Impervious Land Use acre DRIVEWAYS FLAT LAT 0.02 ___________________________________________________________________ Element Flows To: Outlet 1 Outlet 2 Permeable Pavement ___________________________________________________________________ ___________________________________________________________________ ANALYSIS RESULTS Stream Protection Duration ___________________________________________________________________ Predeveloped Landuse Totals for POC #1 Total Pervious Area:0.68 Total Impervious Area:0 ___________________________________________________________________ Mitigated Landuse Totals for POC #1 Total Pervious Area:0 Total Impervious Area:0.683691 ___________________________________________________________________ Flow Frequency Return Periods for Predeveloped. POC #1 Return Period Flow(cfs) 2 year 0.011434 5 year 0.017667 PO Box 1478 Everett, WA 98206 Phone: (425) 303-9363 Fax: (425) 303-9362 Email:info@insightengineering.net 10 year 0.021039 25 year 0.024462 50 year 0.026493 100 year 0.028162 Flow Frequency Return Periods for Mitigated. POC #1 Return Period Flow(cfs) 2 year 0 5 year 0 10 year 0 25 year 0 50 year 0 100 year 0 ___________________________________________________________________ Stream Protection Duration Annual Peaks for Predeveloped and Mitigated. POC #1 Year Predeveloped Mitigated 1902 0.016 0.000 1903 0.006 0.000 1904 0.010 0.000 1905 0.007 0.000 1906 0.003 0.000 1907 0.018 0.000 1908 0.011 0.000 1909 0.012 0.000 1910 0.020 0.000 1911 0.010 0.000 1912 0.028 0.000 1913 0.017 0.000 1914 0.004 0.000 1915 0.006 0.000 1916 0.009 0.000 1917 0.005 0.000 1918 0.011 0.000 1919 0.008 0.000 1920 0.011 0.000 1921 0.011 0.000 1922 0.013 0.000 1923 0.008 0.000 1924 0.006 0.000 1925 0.006 0.000 1926 0.010 0.000 1927 0.013 0.000 1928 0.009 0.000 1929 0.018 0.000 1930 0.011 0.000 1931 0.011 0.000 1932 0.008 0.000 1933 0.009 0.000 1934 0.025 0.000 1935 0.009 0.000 1936 0.015 0.000 1937 0.012 0.000 1938 0.013 0.000 1939 0.001 0.000 PO Box 1478 Everett, WA 98206 Phone: (425) 303-9363 Fax: (425) 303-9362 Email:info@insightengineering.net 1940 0.010 0.000 1941 0.010 0.000 1942 0.015 0.000 1943 0.005 0.000 1944 0.012 0.000 1945 0.011 0.000 1946 0.010 0.000 1947 0.007 0.000 1948 0.024 0.000 1949 0.019 0.000 1950 0.010 0.000 1951 0.012 0.000 1952 0.034 0.000 1953 0.030 0.000 1954 0.009 0.000 1955 0.008 0.000 1956 0.005 0.000 1957 0.013 0.000 1958 0.032 0.000 1959 0.019 0.000 1960 0.007 0.000 1961 0.020 0.000 1962 0.010 0.000 1963 0.005 0.000 1964 0.007 0.000 1965 0.023 0.000 1966 0.004 0.000 1967 0.009 0.000 1968 0.012 0.000 1969 0.008 0.000 1970 0.013 0.000 1971 0.025 0.000 1972 0.016 0.000 1973 0.018 0.000 1974 0.010 0.000 1975 0.027 0.000 1976 0.012 0.000 1977 0.007 0.000 1978 0.023 0.000 1979 0.006 0.000 1980 0.011 0.000 1981 0.011 0.000 1982 0.008 0.000 1983 0.019 0.000 1984 0.005 0.000 1985 0.011 0.000 1986 0.009 0.000 1987 0.019 0.000 1988 0.014 0.000 1989 0.011 0.000 1990 0.014 0.000 1991 0.010 0.000 1992 0.016 0.000 1993 0.013 0.000 1994 0.024 0.000 1995 0.006 0.000 PO Box 1478 Everett, WA 98206 Phone: (425) 303-9363 Fax: (425) 303-9362 Email:info@insightengineering.net 1996 0.026 0.000 1997 0.012 0.000 1998 0.012 0.000 1999 0.001 0.000 2000 0.009 0.000 2001 0.006 0.000 2002 0.014 0.000 2003 0.013 0.000 2004 0.013 0.000 2005 0.014 0.000 2006 0.008 0.000 2007 0.009 0.000 2008 0.012 0.000 2009 0.008 0.000 2010 0.006 0.000 2011 0.008 0.000 2012 0.010 0.000 2013 0.009 0.000 2014 0.006 0.000 2015 0.017 0.000 2016 0.003 0.000 2017 0.019 0.000 2018 0.032 0.000 2019 0.034 0.000 2020 0.010 0.000 2021 0.016 0.000 2022 0.006 0.000 2023 0.013 0.000 2024 0.024 0.000 2025 0.010 0.000 2026 0.018 0.000 2027 0.008 0.000 2028 0.004 0.000 2029 0.013 0.000 2030 0.025 0.000 2031 0.007 0.000 2032 0.006 0.000 2033 0.006 0.000 2034 0.007 0.000 2035 0.028 0.000 2036 0.015 0.000 2037 0.003 0.000 2038 0.014 0.000 2039 0.001 0.000 2040 0.005 0.000 2041 0.008 0.000 2042 0.029 0.000 2043 0.013 0.000 2044 0.018 0.000 2045 0.011 0.000 2046 0.013 0.000 2047 0.008 0.000 2048 0.011 0.000 2049 0.010 0.000 2050 0.007 0.000 2051 0.012 0.000 PO Box 1478 Everett, WA 98206 Phone: (425) 303-9363 Fax: (425) 303-9362 Email:info@insightengineering.net 2052 0.007 0.000 2053 0.012 0.000 2054 0.014 0.000 2055 0.005 0.000 2056 0.004 0.000 2057 0.008 0.000 2058 0.009 0.000 ___________________________________________________________________ Stream Protection Duration Ranked Annual Peaks for Predeveloped and Mitigated. POC #1 Rank Predeveloped Mitigated 1 0.0338 0.0000 2 0.0336 0.0000 3 0.0317 0.0000 4 0.0316 0.0000 5 0.0301 0.0000 6 0.0288 0.0000 7 0.0285 0.0000 8 0.0280 0.0000 9 0.0265 0.0000 10 0.0262 0.0000 11 0.0254 0.0000 12 0.0250 0.0000 13 0.0247 0.0000 14 0.0245 0.0000 15 0.0236 0.0000 16 0.0236 0.0000 17 0.0233 0.0000 18 0.0228 0.0000 19 0.0197 0.0000 20 0.0197 0.0000 21 0.0194 0.0000 22 0.0192 0.0000 23 0.0187 0.0000 24 0.0187 0.0000 25 0.0186 0.0000 26 0.0184 0.0000 27 0.0180 0.0000 28 0.0180 0.0000 29 0.0178 0.0000 30 0.0177 0.0000 31 0.0173 0.0000 32 0.0173 0.0000 33 0.0163 0.0000 34 0.0162 0.0000 35 0.0161 0.0000 36 0.0155 0.0000 37 0.0151 0.0000 38 0.0150 0.0000 39 0.0145 0.0000 40 0.0145 0.0000 41 0.0144 0.0000 42 0.0142 0.0000 43 0.0142 0.0000 44 0.0140 0.0000 PO Box 1478 Everett, WA 98206 Phone: (425) 303-9363 Fax: (425) 303-9362 Email:info@insightengineering.net 45 0.0139 0.0000 46 0.0134 0.0000 47 0.0132 0.0000 48 0.0131 0.0000 49 0.0131 0.0000 50 0.0130 0.0000 51 0.0129 0.0000 52 0.0128 0.0000 53 0.0128 0.0000 54 0.0127 0.0000 55 0.0126 0.0000 56 0.0125 0.0000 57 0.0125 0.0000 58 0.0124 0.0000 59 0.0124 0.0000 60 0.0124 0.0000 61 0.0122 0.0000 62 0.0122 0.0000 63 0.0122 0.0000 64 0.0119 0.0000 65 0.0117 0.0000 66 0.0117 0.0000 67 0.0117 0.0000 68 0.0115 0.0000 69 0.0114 0.0000 70 0.0113 0.0000 71 0.0112 0.0000 72 0.0112 0.0000 73 0.0112 0.0000 74 0.0112 0.0000 75 0.0111 0.0000 76 0.0111 0.0000 77 0.0110 0.0000 78 0.0109 0.0000 79 0.0109 0.0000 80 0.0108 0.0000 81 0.0106 0.0000 82 0.0105 0.0000 83 0.0105 0.0000 84 0.0104 0.0000 85 0.0104 0.0000 86 0.0103 0.0000 87 0.0103 0.0000 88 0.0102 0.0000 89 0.0102 0.0000 90 0.0102 0.0000 91 0.0101 0.0000 92 0.0100 0.0000 93 0.0100 0.0000 94 0.0099 0.0000 95 0.0099 0.0000 96 0.0095 0.0000 97 0.0094 0.0000 98 0.0094 0.0000 99 0.0093 0.0000 100 0.0091 0.0000 PO Box 1478 Everett, WA 98206 Phone: (425) 303-9363 Fax: (425) 303-9362 Email:info@insightengineering.net 101 0.0091 0.0000 102 0.0091 0.0000 103 0.0088 0.0000 104 0.0087 0.0000 105 0.0086 0.0000 106 0.0085 0.0000 107 0.0083 0.0000 108 0.0082 0.0000 109 0.0082 0.0000 110 0.0082 0.0000 111 0.0082 0.0000 112 0.0081 0.0000 113 0.0081 0.0000 114 0.0078 0.0000 115 0.0077 0.0000 116 0.0077 0.0000 117 0.0077 0.0000 118 0.0075 0.0000 119 0.0075 0.0000 120 0.0074 0.0000 121 0.0072 0.0000 122 0.0071 0.0000 123 0.0070 0.0000 124 0.0069 0.0000 125 0.0069 0.0000 126 0.0068 0.0000 127 0.0067 0.0000 128 0.0065 0.0000 129 0.0063 0.0000 130 0.0062 0.0000 131 0.0061 0.0000 132 0.0060 0.0000 133 0.0059 0.0000 134 0.0058 0.0000 135 0.0056 0.0000 136 0.0056 0.0000 137 0.0056 0.0000 138 0.0055 0.0000 139 0.0055 0.0000 140 0.0055 0.0000 141 0.0054 0.0000 142 0.0053 0.0000 143 0.0051 0.0000 144 0.0049 0.0000 145 0.0048 0.0000 146 0.0047 0.0000 147 0.0045 0.0000 148 0.0045 0.0000 149 0.0042 0.0000 150 0.0040 0.0000 151 0.0039 0.0000 152 0.0032 0.0000 153 0.0028 0.0000 154 0.0026 0.0000 155 0.0013 0.0000 156 0.0008 0.0000 PO Box 1478 Everett, WA 98206 Phone: (425) 303-9363 Fax: (425) 303-9362 Email:info@insightengineering.net 157 0.0006 0.0000 ___________________________________________________________________ Stream Protection Duration POC #1 The Facility PASSED The Facility PASSED. Flow(cfs) Predev Mit Percentage Pass/Fail 0.0057 54379 0 0 Pass 0.0059 50140 0 0 Pass 0.0061 46193 0 0 Pass 0.0063 42741 0 0 Pass 0.0066 39581 0 0 Pass 0.0068 36713 0 0 Pass 0.0070 34098 0 0 Pass 0.0072 31742 0 0 Pass 0.0074 29689 0 0 Pass 0.0076 27767 0 0 Pass 0.0078 25907 0 0 Pass 0.0080 24195 0 0 Pass 0.0082 22609 0 0 Pass 0.0084 21073 0 0 Pass 0.0087 19636 0 0 Pass 0.0089 18326 0 0 Pass 0.0091 17121 0 0 Pass 0.0093 16064 0 0 Pass 0.0095 15051 0 0 Pass 0.0097 14071 0 0 Pass 0.0099 13152 0 0 Pass 0.0101 12326 0 0 Pass 0.0103 11533 0 0 Pass 0.0105 10861 0 0 Pass 0.0108 10245 0 0 Pass 0.0110 9694 0 0 Pass 0.0112 9204 0 0 Pass 0.0114 8648 0 0 Pass 0.0116 8208 0 0 Pass 0.0118 7757 0 0 Pass 0.0120 7349 0 0 Pass 0.0122 6991 0 0 Pass 0.0124 6617 0 0 Pass 0.0126 6309 0 0 Pass 0.0129 6000 0 0 Pass 0.0131 5731 0 0 Pass 0.0133 5457 0 0 Pass 0.0135 5213 0 0 Pass 0.0137 4983 0 0 Pass 0.0139 4765 0 0 Pass 0.0141 4548 0 0 Pass 0.0143 4340 0 0 Pass 0.0145 4136 0 0 Pass 0.0147 3947 0 0 Pass 0.0150 3793 0 0 Pass 0.0152 3649 0 0 Pass PO Box 1478 Everett, WA 98206 Phone: (425) 303-9363 Fax: (425) 303-9362 Email:info@insightengineering.net 0.0154 3508 0 0 Pass 0.0156 3374 0 0 Pass 0.0158 3275 0 0 Pass 0.0160 3167 0 0 Pass 0.0162 3073 0 0 Pass 0.0164 2983 0 0 Pass 0.0166 2898 0 0 Pass 0.0168 2807 0 0 Pass 0.0170 2718 0 0 Pass 0.0173 2619 0 0 Pass 0.0175 2521 0 0 Pass 0.0177 2426 0 0 Pass 0.0179 2317 0 0 Pass 0.0181 2217 0 0 Pass 0.0183 2129 0 0 Pass 0.0185 2027 0 0 Pass 0.0187 1961 0 0 Pass 0.0189 1898 0 0 Pass 0.0191 1833 0 0 Pass 0.0194 1764 0 0 Pass 0.0196 1691 0 0 Pass 0.0198 1636 0 0 Pass 0.0200 1575 0 0 Pass 0.0202 1510 0 0 Pass 0.0204 1456 0 0 Pass 0.0206 1397 0 0 Pass 0.0208 1338 0 0 Pass 0.0210 1278 0 0 Pass 0.0212 1221 0 0 Pass 0.0215 1173 0 0 Pass 0.0217 1126 0 0 Pass 0.0219 1082 0 0 Pass 0.0221 1033 0 0 Pass 0.0223 987 0 0 Pass 0.0225 938 0 0 Pass 0.0227 904 0 0 Pass 0.0229 863 0 0 Pass 0.0231 812 0 0 Pass 0.0233 778 0 0 Pass 0.0236 742 0 0 Pass 0.0238 703 0 0 Pass 0.0240 657 0 0 Pass 0.0242 616 0 0 Pass 0.0244 584 0 0 Pass 0.0246 547 0 0 Pass 0.0248 507 0 0 Pass 0.0250 460 0 0 Pass 0.0252 415 0 0 Pass 0.0254 387 0 0 Pass 0.0257 360 0 0 Pass 0.0259 339 0 0 Pass 0.0261 303 0 0 Pass 0.0263 286 0 0 Pass 0.0265 266 0 0 Pass _____________________________________________________ PO Box 1478 Everett, WA 98206 Phone: (425) 303-9363 Fax: (425) 303-9362 Email:info@insightengineering.net ___________________________________________________________________ Water Quality BMP Flow and Volume for POC #1 0 On-line facility volume: acre-feet 0 On-line facility target flow: cfs. 0 Adjusted for 15 min: cfs. 0 Off-line facility target flow: cfs. 0 Adjusted for 15 min: cfs. ___________________________________________________________________ LID Report LID Technique Used for Total Volumn Volumn Infiltration Cumulative Percent Water Quality Percent Comment Treatment? Needs Through Volumn Volumn Volumn Water Quality Treatment Facility (ac-ft.) Infiltration Infiltrated Treated (ac-ft) (ac-ft) Credit Permeable Pavement POC Y 228.38 250.97 250.94 Y 99.99 250.94 99.99 Treat. Credit Total Volume Infiltrated 228.38 250.97 250.94 99.99 250.94 251 / 251 = 10Treat. Credit = 100% Compliance with LID Standard 8 Duration Analysis Result = Passed ___________________________________________________________________ Perlnd and Implnd Changes No changes have been made. ___________________________________________________________________ This program and accompanying documentation are provided 'as-is' without warranty of any kind. The entire risk regarding the performance and results of this program is assumed by End User. Clear Creek Solutions Inc. and the governmental licensee or sublicensees disclaim 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 Inc. 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 Inc. or their authorized representatives have been advised of the possibility of such damages. Software Copyright © by : Clear Creek Solutions, Inc. 2005-2017; All Rights Reserved. PO Box 1478 Everett, WA 98206 Phone: (425) 303-9363 Fax: (425) 303-9362 Email:info@insightengineering.net