EXH0629024556

2yr/2-hr: DSS Tech Note 3 Appendix C, Table C3a 2yr/72hr: DSS Tech Note 3 Appendix C, Table C3 • Design precipitations: 2yr/2hr: DSS Tech Note 3 Figure A4 - 2yr/24hr: DSS Tech Note 3 Figure A2 (from NOA.A) 2yr/72hr: 24hr x 1.23 (from Figure 8f, Characteristics of Extreme Precipitation Events in Wash State) 3yr/72hr: 2yr/24hr x 1.30 (from Figure 8f, Characteristics of Extreme Precipitation Events in Wash State) Design Flows for Effluent • For acute criterion, use the maximum of: Average flow from 2yr/2hr event, or _ [_.j C__¢Peak flow from 2yr/72hr event --_ _ L q.z,_ct • For chronic criterion, use: - Average flow from 3yr172hr event _ _e__ k.)o_.J_0_, f._co_... Basin Parameters: SDW-1 G'_"_" • Pervious area: 90.9 acres _ 6,/"_ • Impervious area: 37.0 acres • Route through detention pond (see attached storage-discharge rating curve) • Flow rates based on detention pond outflow AR 024556 FTA.BLE 47 ROWS COLS *** SDW-!: MILLER CREEK ***LEVEL 2 o,"----_'_ _"_" _J_[_"_ _ " _' 2, _3/_'_' DEPTH L_ AREA VOLUME OUTFLOW *** _ _, 55 1.00 .00 .00 00 .61- i.75- 00 1.21 2[48 ! 46 1 00 2 14 3 28 1 00 3 I0 3 92 1 00 4 07 4 47 1 00 5 05 4 96 1 00 6 06 5 40 1 00 7 09 5 82 1.00 8 03 6 27 !.00 9 08 9 05 1.00 9 63 13 97 6.4i 1.00 I0 16 15 12 1 00 I0 60 16 13 1…

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PSCAA Advisory Council Meeting Agenda
Add to CalendarMWednesday Mar 11, 9:00am - 11:35am
1904 3rd Avenue, Suite 105, Seattle, WA 98101
Call to order – Roll Call – Quorum Established – Land Acknowledgement We would like to acknowledge that our Agency operates in four present-day counties, which are the traditional lands of the Coast Salish people, past and present. This acknowledgement does not take the place of authentic relationships with indigenous communities in our jurisdiction and [...]