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<br />POTENTIAL FLOOD DAMAGES
<br />
<br />The existing threshold flood for Cherry Creek Dam is 63 percent of the
<br />
<br />PMF, A flood that is greater than 63 percent of the PMF does not meet freeboard
<br />
<br />requirements and threatens the safety of the dam.
<br />
<br />Assuming dam failure for floods greater than the threshold flood, damages
<br />downstream from Cherry Creek Lake Dam would be $2,880,000,000 for 75 percent of
<br />the PMF and $2,980,000,000 for 100 percent of the PMF.
<br />
<br />Damages on Sand and Toll Gate Creeks beg:ln at approximately 50 percent of
<br />
<br />the PMF, Damages for 50, 75, and 100 percent of the PMF are $75,000,000,
<br />
<br />$123,000,000, and $150,000,000, respectively.
<br />
<br />Table 10 presents the potential flood damages downstream of Cherry Creek Dam
<br />
<br />and the damages on Sand and Toll Gate Creeks,
<br />
<br />The damages upstream of Cherry Creek Darn tot.al $36,400,000 at the pool. level
<br />where the embankment is overtopped.
<br />
<br />Table 10
<br />Potential Flood Damages
<br />
<br />Percent of PMF Cherry Creek Sand/Toll CLatQ Total
<br />50 Percent $ 75,000,000 $ 75,000,000
<br />75 Percent $2,880,000,000 $123,000,000 $3,003,000,000
<br />100 Percent $2,980,000,000 $150,000,000 $3,130,000,000
<br />
<br />PROJECT BENEFITS
<br />
<br />The benefits derived from the existence of Cherry Creek Dam ,are flood
<br />control benefits and recreation benefits. The annual flood control benefi ts are
<br />$21,020.000, The cumulative damages prev,mted by Cherry Creek Dam through IT
<br />1987 are $163,267,000,
<br />
<br />33
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