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RRBC – Long Term Flood Solutions

RRBC – Long Term Flood Solutions. Comprehensive Basinwide Protection Recommendations 13 Primary Principals: Serve as framework moving forward Establish acceptable levels of protection Basin approach – multiple measures to accomplish Uniform flood regulations and zoning

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RRBC – Long Term Flood Solutions

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

  2. Red River Basin Commission – Basinwide Flow Reduction Strategy • 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

  3. Comprehensive Detention Planning…. Continued Progress

  4. Red River Basin Tributary Detention Planning Efforts ND Comprehensive Detention Plans MN Expanded Distributed Detention Strategy • 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

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

  6. Distributed Detention Planning – Level of Detail

  7. MN Expanded Distributed Detention Scope

  8. MN Expanded Distributed Detention Strategy – WRWD Example

  9. Red River Basin Commission Basinwide Flow Reduction Strategy Peak Flow Goal: 35% Reduction Peak Flow Obtained: 36% Reduction

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