Agenda Packets - 2012/08/13 - Laserfiche WebLink

Home Browse Search

Section 4 4-32 Ramsey County Multijurisdictional Hazard Mitigation Plan | July 2012 Assets Exposed to Hazard  Property Risk/Vulnerability: Ramsey County is continuing to evaluate and prioritize properties for reconstruction and/or acquisition/removal.  People Risk/Vulnerability: In evaluating vulnerability of the population in Ramsey County, it was determined, that risk/vulnerability includes the entire population of the County. People living in and around identified floodplain areas are more vulnerable to a flooding incident than those who live/work out of floodplain areas, but these areas can still be impacted depending on the severity of the flooding incident. This is particularly true due to a significant chance of a flooding incident occurring in any given year in the County.  Environment Risk/Vulnerability: Risks to the environment are high for a flooding incident should one occur. Most of the environmental risks would be access to water and the effects floodwater has on public water supply. Flooding can affect and create contamination of potable water for public consumption. Estimate of Potential Losses HAZUS-MH was used to estimate the damages incurred for a 100-year flood incident in Ramsey County. An estimated 26 buildings could be damaged, totaling $15.7 million in building losses and $32.5 million in total economic losses. HAZUS-MH estimates seven census blocks with losses exceeding $1 million. Land Use and Development Trends The Metropolitan Council determines land use and development for Ramsey County and takes flooding into consideration. Elevation controlled outlet structures stabilize low water elevations and control discharge during high water events. In association with development on Johanna Lake, Little Johanna Lake, Josephine Lake, Lake Owasso, Lake Wabasso, Lake Emily, Mud Lake, and Turtle Lake, these structures have been installed to protect against flooding. Additionally, discharge from Mud Lake flows through underground piping into Lake Emily to avoid flooding on Victoria and Arbogast streets. Within the county, numerous wetland areas are reserved as storm water detention areas to aid in reducing flood discharges. Vulnerability Flooding Frequency of Occurrence Likely Warning Time More than 12 hours Geographic Extent Community-wide Potential Impact Major Multijurisdictional Concerns Previous mitigation measures have occurred at the County and regional level. Ramsey County participates in the National Flood Insurance Program (NFIP) of the Federal Emergency Management Agency (FEMA). As a participating community, the County has adopted Floodplain Management practices 44 CFR Requirement 201.6 (c)(2)(ii) The risk assessment must also address National Flood Insurance Program (NFIP) insured structures that have been repetitively damaged by floods.