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7000 <br />6000 <br />614I4I4' <br />4000 <br />0 3000 <br />LL <br />NOR <br />1000 <br />Havana Street Dam Modeled Inflow and Outflow <br />0 <br />12Sep2013 0000 12Sep2013 0600 12Sep2013 1200 12Sep2013 1800 13Sep2013 0000 <br />Time - 5 Minute Increments (MDT) <br />HMS - Inflow HMS- Outflow No Breach <br />HMS - Outflow Breach RAS -Outflow Breach <br />Figure 11 - Comparison of HMS 8t RAS Breach Hydrographs <br />The modeled breach is necessarily much more simple than the actual surveyed breach <br />geometry. Figure 12 below provides a comparison of the ultimate surveyed breach <br />section and the idealized section used in the HMS model. <br />Havana Street Pond Dam Modeled Breach Configuration <br />5258 <br />00 5256 <br />j 5254 <br />Z 5252 <br />w <br />5250 <br />g 5248 <br />$ 5246 <br />0 5244 <br />a 5242 <br />CD <br />„M 5240 <br />5238 <br />0 10 20 30 40 50 60 70 80 90 100 110 120 130 <br />Station (ft) <br />SURVEYED BREACH SECTION MODELED BREACH SECTION <br />Figure 12 - Comparison of Surveyed vs. Modeled Breach Geometry <br />The empirical equations recommended in Colorado's Dam Breach Guidelines were also <br />consulted (Colorado DSB, 2010) The computed breach parameters utilizing the <br />