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5E, Quotes for Survey Work - 2013 PMP
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5E, Quotes for Survey Work - 2013 PMP
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For this study,approximately 85 miles of stream segments from 6 different riverine systems was modeled <br /> including all hydraulic conveyance structures along the reach. AreGIS digital spatial files were produced <br /> in a geodatabase format according to FEMA's standards.Also, Bolton&Menk was responsible for <br /> producing the technical sections of the Flood Insurance Study(FIS). <br /> FEMA determined that Bolton&Menk's hydraulic modeling,technical data, and supporting <br /> documentation met the guidelines of an official FIS and DFIRM and was approved for production and <br /> distribution.Meeker County is fully utilizing the detailed flood information to make accurate and <br /> confident floodplain management decisions. <br /> Turtle Creek Flood Mitigation Study,City of Austin,Minnesota <br /> Over the past several decades,residential properties along Turtle Creek in Austin,MN have flooded due <br /> to excessive rainfall in both the Turtle Creek and Cedar River watersheds. Since the confluence of Turtle <br /> Creek and the Cedar River is situated in a highly developed portion of the City,the hydrologic conditions <br /> of each system are highly dependent upon one another in terms of the flooding conditions in town.During <br /> low flows in the Cedar River, flood flows in Turtle Creek are high enough to cause damage. However,the <br /> risk for flooding increases as flows in the Cedar River increase.In other words,the tailwater condition on <br /> Turtle Creek plays a significant role in reducing the flood storage capacity of the Turtle Creek system in <br /> the lower reach. <br /> Bolton&Menk,Inc.was hired to perform hydrologic and hydraulic studies of the system in order to <br /> determine the impacts of flooding for a variety of hydraulic conditions and propose several flood <br /> mitigation strategies to protect residential properties along Turtle Creek. Since stream gauge data and <br /> other applicable flood measurements were limited for this study,public involvement and feedback served <br /> as a valuable source of information by which the hydraulic modeling was calibrated and validated.Bolton <br /> &Menk,in conjunction with City staff, initiated an information gathering process that included targeted <br /> mailings to residents that have either been historically affected by flooding or those deemed at high risk <br /> of flooding during future rainfall events.The residents were asked to provide information regarding <br /> which flood events impacted them, some idea of how high the flood waters reached,locations of where <br /> flooding may have entered the home,and any other pertinent information that would help Bolton&Menk <br /> perform the study. This,along with FEMA Elevation Certificates,was organized and presented to the <br /> residents in a public forum where residents, City officials,and consulting engineers discussed the current <br /> flooding problems and their severity,best management practices(BMP)that would fit in the available <br /> areas,and projected timelines for improvements. <br /> Bolton&Menk developed several HEC-RAS models that predicted flood impacts for the existing <br /> conditions as well as several proposed mitigation scenarios.Along Turtle Creek,flooding sources include <br /> flood direct surface flooding as well as basement inundation from ground water sccpagc or sanitary sewer <br /> backup.Therefore,the flood protection scenarios included earthen flood control berms,structural <br /> retaining wall structures,property acquisition, and other individual spot-protection including sump pump, <br /> drain tile and sanitary sewer. <br /> N:\PROPOSALS\$Survey\Bumsville\2012\Topo\Arden Hills 201RArden Hills 2013 PMP.doc <br />
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