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<br /> <br />Rice Creek Watershed District <br />District Wide Modeling <br />Final Report <br /> <br />HEI Project No. R11.5555-060.19 Page 23 of 54 <br />RCWD Account No. 60-19-4500 <br /> <br />Table 8 <br />Planning Region Peak Discharges and Runoff Volumes. <br />Planning <br />Region <br />2 year, 24 hour <br />precipitation <br />event <br />10 year, 24 hour <br />precipitation <br />event <br />100 year, 24 hour <br />precipitation <br />event <br />100 year, 10 day <br />snowmelt runoff <br />event <br /> Peak <br />Discharge <br />(cfs) <br />Volume* <br />(ac-ft) <br />Peak <br />Discharge <br />(cfs) <br />Volume* <br />(ac-ft) <br />Peak <br />Discharge <br />(cfs) <br />Volume* <br />(ac-ft) <br />Peak <br />Discharge <br />(cfs) <br />Volume* <br />(ac-ft) <br />Upper Rice <br />Creek 178.3 925 289.3 1,734 413.5 2,978 439.4 7,068 <br />Hardwood <br />Creek 195.0 517 303.2 922 422.0 1,724 413.1 6,003 <br />Clearwater <br />Creek 91.6 657 180.8 1,436 491.4 3,182 907.5 9,392 <br />Middle Rice <br />Creek 111.2 1,165 272.6 2,967 575.6 6,315 1,207.2 18,136 <br />Lower Rice <br />Creek 349.2 2,705 743.5 6,247 1285.7 11,881 1534.7 27,413 <br />*Volume for 24 hour event is the volume over a 7 day period following start of a 24-hr <br />event, and 13 days following the start of the 10 day event <br />4.3.3 Intercommunity Flows <br />The final category identified in the WMP as Regional Assessment Locations are <br />intercommunity flows. The public drainage systems of the Rice Creek Watershed District <br />convey much of the stormwater discharge between the cities within the District, and are <br />relatively easy locations to quantify, assess, and manage stormwater discharge. Figure 10 shows <br />the locations of intercommunity flows along the public drainage systems and public waterways <br />of the District. A summary of modeled peak discharges for each of these locations is provided in <br />Table 9. These discharges are based upon current land uses and provide a benchmark for <br />evaluating potential intercommunity issues. In the future, the conveyance capacity of these <br />locations can be compared to current and projected flows, and subsequently be assessed for any <br />potential deficiencies. These values may also be used by the cities to assess the adequacy of <br />capacity within the conveyance system. <br />Dr <br />a <br />f <br />t <br /> <br />11 <br />/ <br />2 <br />0 <br />/ <br />2 <br />0 <br />1 <br />7