Idaho Risk MAP Activities

1. Idaho Risk MAP Activities Ryan McDaniel, CFM Cooperating Technical Partners Coordinator Idaho Department of Water Resources

2. What is RiskMAP? Idaho Risk MAP Sequence & LiDAR Idaho Risk MAP Discovery Overview Idaho Risk MAP Product Lines Opportunities in Risk MAP

3. What is Risk MAP? Beginning in Fiscal Year (FY) 2009, FEMA initiated the Risk MAP program. FEMA’s vision for the Risk MAP program is “to deliver quality data that increases public awareness and leads to mitigation actions that reduce risk to life and property.” To achieve this vision, FEMA will transform its traditional flood identification and mapping efforts into a more integrated process of accurately identifying, assessing, communicating, planning and mitigating flood risks, according to Procedure Memorandum No. 59 (July 23, 2010).

4. What is Risk MAP? Regional Flood Hazard Data Knowledge Management Interface National Flood Insurance Program Geographic Information System Idaho Hazard Mitigation Floodplain Management

5. What is Risk MAP?

6. What is Risk MAP? Risk MAP Timeline

7. Idaho Risk MAP Business Plan Idaho Risk MAP Program Statement Executive Summary Purpose Intent Role Background Statement of Work Vision Goals Objectives: Summary Narrative 1 Aerial Topographic Mapping 2 Floodplain Technical Mapping Activity 3 Community Risk Assessment and GIS Support 4 Outreach 5 Project Management and Staffing Strategy: Matrix Resource Needs Future Activities Reference Materials Program Diagrams Idaho Flood Risk Portfolio: Priority Sequence

8. Idaho Flood Risk Portfolio

9. Idaho Flood Risk Portfolio

10. Idaho Risk MAP LiDAR Acquisition

11. Idaho Risk MAP Prioritization

12. Idaho Risk MAP Discovery Payette Diverting high-water down canals Significant flooding in the past in Payette, Emmett and Horseshoe bend 3 Wastewater facilities abut Payette River Diversion Dam at Hydro-electric plan Levees, Levees on private property Black Canyon Reservoir is filling with sediment Use LiDAR to re-delineate A zones Detailed AE zones in Municipal Areas of Impact

13. Idaho Risk MAP Discovery Lower Boise Detailed Studies on 10-Mile, 9-Mile, 5-Mile and Indian Creeks Utilize existing USACE H&H Model for the Boise River and Continue from Ada Co to Snake ACCEM already has Hazus II complete, work on Canyon Co. Boise Foothills Tributaries need to be re-delineated using LiDAR Canals represent a significant flood risk to much of the watershed, as do dam breach scenarios

14. Idaho Risk MAP Discovery Big Wood Significant inaccuracies in existing DFIRM due to original 10m DEM delineation, recent Digital Conversion perpetuated this error Significant backwater flooding in several cities caused by undersized culverts, roadway and railway embankments Levees, Levees on private property, PAL’s Split-flow modeling concerns on the Big Wood River Use LiDAR to re-delineate A zones Numerous Claims outside SFHA Identified extensive coverage of D zones

15. Idaho Risk MAP Discovery Upper Henry’s Upper part of the watershed has high risk during tourism season Freemont County requested A zones at Big Springs Thirsty Creek. Redelineate Duck Creek using LiDAR, but account for undersized culverts at roadways Island Park and Ashton Dam Failure Warning systems need be considered for PDM Grants Ashton Dam is currently under reconstruction due to seepage issues

16. Idaho Risk MAP Discovery Lower Henry’s Major risk associated with ice jams at several flooding areas Redelineate A zones using LiDAR at the St. Anthony Coffer Dam, it pushes water from Henry’s over an irrigation canal and causes major flooding Detailed Study at Salem Parker Highway to guide development Yellowstone and Enterprise canals represent substantial risk for breach Numerous undersized culverts

17. Idaho Risk MAP Discovery Teton Primary flood risk is rain on snow on frozen ground events; secondary flood risks are ice jams where narrow canyons meet wide, flat floodplains; tertiary risk where ice jams divert floodwaters into canals North Fork/South Fork Teton River, Teton Creek and Trail Creek need AE zones Sugar City has series of bridges funnel water/ice toward city Spring and South Leigh Creek under development pressure

18. Idaho Risk MAP Product Lines Flood Risk Geodatabase Changes Since Last FIRM Data Areas of Mitigation Interest Flood Risk Assessment Data Flood Depth & Analysis Grids Flood Risk Map Flood Risk Report

19. Opportunities in Risk MAP • State prioritization of watersheds • Develop consistent standards for flood hazard data • Communicate a common flood risk message *** Done in order to provide local governments with the necessary information to define their own future: one with reduced flood risk. ***

20. Idaho Risk MAP Activities Ryan McDaniel, CFM Cooperating Technical Partners Coordinator Idaho Department of Water Resources Thank You!