04-09-2015 - Laserfiche WebLink

IV. Present meandering statistics for the Red River of the North, Rush, Lower Rush, Maple and Sheyenne rivers and compare to bankfull geometry and streamwise slopes. V. Provide initial description of approach for meander belt width analysis using RVR Meander, including modeling in probabilistic terms. VI. Develop and calibrate RVR Meander models for selected reaches of the Red River of the North, Rush, Lower Rush, Maple, and Sheyenne Rivers. Prepare a second Draft Technical Memorandum: I. Describe approach for meander belt width analysis using RVR Meander and extended geomorphologic analysis of the Red River of the North and its tributaries. II. Process data for input into meander belt width analysis of LFC. III. Provide meander belt width analysis of LFC using RVR meander, and iterations with sediment transport calculations. IV. Extend geomorphologic analysis of the Red River of the North and its tributaries, including determination of channel migration rates and channel avulsion potential over long time scales. V. Recommend design planform and cross section configuration for Final Design of LFC. Develop a brief, graphics-rich, PowerPoint presentation of the background and results. This presentation must be suitable for a non-technical audience. Deliverables: I. REV2 Technical Memorandum – Meander Belt Width Analysis II. REV2 PowerPoint Presentation B. IDENTIFICATION AND ASSESSMENT OF TIE-BACK LEVEES: I. Background: USACE is undertaking an analysis to determine if the tie-back levees would be classified as jurisdictional dams. If the tie-back levees are classified as dams, the impact to the project needs to be determined. II. Assist the Owner and PMC with identifying and assessing the impacts to the Project due to the possible reclassification of the tie-back levees to be jurisdictional dams. Assistance may include: • analysis and comparison of Federal, State of North Dakota, and State of Minnesota regulations • identification of applicable design criteria • analysis of floodplain impacts, including FEMA, state law and rules, and local jurisdiction regulations • assessment of spillway and flowway requirements • recommendations for options for the project C. EMB OPENINGS: I. Background: prior to operation of the Diversion, the Fargo-Moorhead area may experience flood events. The partially constructed works should not increase the impacts of flooding. II. Determine the location and size of openings in the excavated material berms (EMBs) to prevent an increase in flood elevations from the “without project” case for the 10-yr and HMG_TO08-A10_Long.docx 3 DR A F T