Comprehensive Basinwide Protection Recommendations 13 Primary Principals: 1.Serve as framework moving forward 2.Establish acceptable levels of protection 3.Basin approach – multiple measures to accomplish 4.Uniform flood regulations and zoning 5.Goals for the reduction in flood flows 6.Reduce runoff rate and volume 7.Incorporate multiple purposes (FDR/NRE…) 8.Avoid or minimize adverse impacts 9.Cost effectiveness 10.RRBC to facilitate implementation of cross-jurisdictional partnerships where possible 11.Evaluation and prioritization of plan recommendations 12.Measure and evaluate implementation of the LTFS 13.Requires a shared responsibility and commitment

Part of Long Term Flood Solutions Report Reduce Red River main-stem flows by 20% Based on 1997 Spring Flood Event Applied to HEC-HMS Synthetic Hydrology

RRBC-LTFS Lidar/Enhanced Technology RRWMB Distributed Detention Plans

Large Scale Sites Identification of all apparent sites WRD Involvement Multiple proposed conditions scenarios Multiple Runoff Events Establish benefit within Tributaries Establish reduction to Red River main stem Detailed reporting Large Scale Sites Identification of all apparent sites WRD Involvement Multiple proposed conditions scenarios Multiple Runoff Events Establish benefit within Tributaries Establish reduction to Red River main stem Detailed reporting Large Scale Sites Identification of sites required to meet LTFS goals Limited WD Involvement One proposed condition Standard melt progression event only Establish benefit within Tributaries Establish reduction to Red River main stem Generalized reporting Large Scale Sites Identification of sites required to meet LTFS goals Limited WD Involvement One proposed condition Standard melt progression event only Establish benefit within Tributaries Establish reduction to Red River main stem Generalized reporting

1.Guide WD project teams – Similar to BdSWD plan. 2.“Get FDR Projects in the Queue!” - State and Local Funding 3.Identify Project Concepts for Potential Federal Funding – Farm Bill 4.Consistency with On-going North Dakota Planning Effort 5.Potential Cost Share of FM Diversion Authority - $25 Million – Sites upstream of Halstad 6.Identify Sites for Halstad Upstream Retention Study (HUR) – RRBC

Project Planning Tool Incorporation Watershed District/LGU Involvement Upstream of local damage areas Large Site Concepts (greater than 10 square miles – most in the 30 SM range) Detention Site Identification LiDAR Derived Elevation/Storage Data LiDAR Derived Contributing Watershed Consider construction/environmental impacts of gated pool elevations Goal: 3” – 4” of gated storage per site (Meet LTFS Volume and Peak Goals) Detention Site Statistics Red River Basin HEC-HMS developed by the US Army Corps of Engineers Incorporate Identified Detention Sites Assume all gates closed 25, 50, 100-yr Rainfall (10-day) & 100-yr, 10-day Runoff (Snow melt progression included ) Hydrologic Analysis - Benefits Existing conditions (Pre-1997) vs Proposed Conditions (Site Outlet, Damage areas, USGS Gages) Watershed scale mapping only Report Summarizing Analysis Reporting