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