Public Informational Meeting Preliminary Flood Insurance Rate Maps - PowerPoint PPT Presentation

Public Informational Meeting Preliminary Flood Insurance Rate Maps and Flood Storage District Mapping February 7, 2019

Overview • Flooding History • Purpose and Goals • Background • Questions

Flooding History Flooding incidents since 1990 • Five Presidential Disaster Declarations • 1990, 1993, 2001, 2004, 2008 • Six Other Flooding Incidents • 1996, 1999 (2), 2000, 2010, 2012 Source: Winnebago County Hazard Mitigation Plan

Purpose and Goals

Purpose and Goals • Reduce health and safety impacts due to street and property flooding – Street flooding impacts access for emergency services (Police and Fire) – Flooding impacts health care facilities – Flooding impacts to homes and businesses

Purpose and Goals • Reduce health and safety impacts due to street and property flooding. Sawyer Creek at 9 th Avenue Washburn Street (Collector) (Collector)

Purpose and Goals • Reduce health and safety impacts due to street and property flooding. Sawyer Creek at Ascension Westfield Street at NE WI Mercy Hospital Evergreen Manor

Purpose and Goals • Reduce health and safety impacts due to street and property flooding. Train Derailment Street & Yard Flooding

Background Area Area Municipality (Acres) (%) 15.7 Square Mile Watershed City of Oshkosh 3,182 31.7 (10,000 acres) Town of Algoma 1,409 14.1 Town of Omro 954 9.5 Town of Nekimi 3,015 30.1 Town of Utica 1,466 14.6 Total 10,026 100%

Background • Bridges – All but one of the 18 bridges were updated in the model. • Detention Basins – 29 basins totaling 640 ac-ft of storage were added in the model. • Dredging – Over 40,000 CY of sediment was removed from the downstream 7,000 LF • Preservation of existing flood storage – Over 293 ac-ft of storage being preserved through flood storage districts.

Background • Who – City and County • What – Completion and documentation of the results of numerous projects involving bridges, detention, storage, and dredging • Where – Throughout the Sawyer Creek Watershed • When – Since 2001 to present • Why – To lower the base flood elevation and reduce health and safety impacts due to street and property flooding