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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />Flood Hazard <br />Page eight <br /> <br />Summary of Findinqs <br /> <br />The following is a summary of our findings: <br /> <br />1) The flood of June 4. 1986. appears to have been greater <br />than a 5-year flood. <br /> <br />2) The home on the sUbject property was constructed long <br />after construction of Kelley Road at a location that is <br />partially or wholly in the 100-year floodplain. <br /> <br />3) Recent development upstream of Kelley Road has <br />attempted to compensate for any increase in runoff by <br />the construction of a detention pond designed to handle <br />up to the 5-year flood. However. siltation from recent <br />flooding may have decreased its effectiveness. <br />Repeated flowage over Kelley Road would indicate that <br />the pond may be under-designed considering detention <br />and entrapment of silt. <br /> <br />4) The existing culvert under Kelley Road (capacity of 22 <br />cfs) is not capable of handling the full 100-year flood <br />(120 cfs). In addition. there appears ,to be <br />significant reduction of that culvert's capacity during <br />major floods as a result of siltation. <br /> <br />5) Raising of Kelley Road over time would have the effect <br />of increasing detention and reducing flood damages <br />downstream of the road and at the subject property. <br /> <br />6) Cutting of roads and excavation for building homes has <br />substantially increased the potential of the drainage <br />basin to generate silt. <br /> <br />7) Historic subdivision practices in the Woodland Park <br />area appear to have ignored drainage hazards. Homes <br />downstream of Kelley Road were constructed on lots <br />partly or wholly in natural drainageways with no <br />provision to assure a continuous route for water during <br />floods. <br />