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Rice Creek Watershed District <br />District Wide Modeling <br />Final Report <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 <br />178.3 <br />925 <br />289.3 <br />1,734 <br />413.5 <br />2,978 <br />439.4 <br />7,068 <br />Hardwood <br />Creek <br />195.0 <br />517 <br />303.2 <br />922 <br />422.0 <br />1,724 <br />413.1 <br />6,003 <br />Clearwater <br />Creek <br />91.6 <br />657 <br />180.8 <br />1,436 <br />491.4 <br />3,182 <br />907.5 <br />9,392 <br />Middle Rice <br />Creek <br />111.2 <br />1,165 <br />272.6 <br />2,967 <br />575.6 <br />6,315 <br />1,207.2 <br />18,136 <br />Lower Rice <br />Creek <br />349.2 <br />2,705 <br />743.5 <br />6,247 <br />1285.7 <br />11,881 <br />1534.7 <br />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 />HEI Project No. R11.5555-060.19 Page 23 of 54 <br />RCWD Account No. 60-19-4500 <br />