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<br />.. <br /> <br />, <br />,I <br />! <br /> <br />. <br /> <br />. <br /> <br />Currently, the Flatiron Property gravel mining operator and current land owner are <br />seeking to certifY the earthen berm as a FEMA approved flood protection levee. The <br />berm has been expanded and increased in height since the adoption of the G&O study, <br />and approvals for this activity have not been subjected to local floodplain regulation since <br />the area was removed from the regulatory floodplain. Based on this, there has been no <br />formal review process, public review, or community evaluation and acceptance for the <br />berm by those landowners and local jurisdictions affected. <br /> <br />The October 10, 1996 letter previously submitted to your office addressed the City of <br />Boulder's concerns regarding FEMA's consideration and approval of a flood protection <br />levee at this location, We continue to have these concerns and again request that FEMA <br />withhold any certification of the existing embankment as a FEMA flood protection levee, <br />pending the resolution of the G&O South Boulder Creek floodplain and associated <br />impacts to the community. <br /> <br />5. <br /> <br />U.S. 36 Median Crash Barrier was not Included in the G&O Study: The G&O study <br />appears to reflect a flow profile that did not include U.S, 36 median crash barrier installed <br />by the State of Colorado. This barrier serves to increase the highway profile by <br />approximately four feet and represents a significant obstruction to floodwaters crossing <br />the highway, Based on this, flooding impacting City neighborhoods in the vicinity of <br />U.S. 36 may be greater than projected in the G&O study, The G&O study should have <br />included the barrier in the floodplain determination. <br /> <br />No impact analysis has ever been provided for the U.S. 36 crash barrier, and the impacts <br />of this barrier have significant consequences for downstream lands given increases in the <br />depths of flooding along the South Boulder Creek split flow. The Colorado Department <br />of Transportation should have provided an impact analysis of the effects of increasing the <br />roadway profile to mitigate any adverse flooding impacts. <br />