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<br />100-yr events. In addition to analysis of Red River and Rush/Lower Rush River events, <br />analyze Sheyenne River and Maple River events. Provide to USACE design teams. <br />D. DIVERSION INLET GATES: <br />I. Background: the FM Diversion Feasibility Study recommended a fixed weir for the inlet <br />to the Diversion Channel. A gated inlet may offer some advantages over the fixed weir. <br />II. Develop preliminary layout and sizing of a gated inlet to the Diversion channel, including <br />gate sizing and number of gates, to pass flows up to the Inflow Design Flood (IDF). <br />Describe operation during the Probable Maximum Flood (PMF). <br />III. Assess capacity limitations of the Sheyenne River aqueduct for events up through the IDF. <br />IV. Determine advantages and disadvantages of a fixed weir and a gated structure, including <br />reliability, operability, through-town hydrograph, environmental, and geotechnical <br />considerations, and impacts on the volume, frequency, and duration of water in the <br />staging and storage areas for the 10, 100, and 500 year events. <br />V. Develop preliminary comparative cost estimates of each type of inlet. <br />E. ON-CALL SERVICES: Respond to requests for services from PMC for tasks not identified to date. <br />Requests will be provided by PMC in writing. Work will not be performed by Engineer without <br />authorization by PMC or Owner. <br />Deliverables: On-call service deliverables as requested. <br />I. MAXIMUM PROJECT DESIGN FLOWS. For approximately 15 Project flow scenarios, <br />ranging from 0 – 250,000 cubic feet per second (cfs) and with a maximum flow rate <br />through the diversion channel of 100,000 cfs: <br />1. Use existing model runs with Fargo Gage range of 30-40 feet and interpolate when <br />needed, determine the following: <br />• Modeled flow rates through the diversion channel. <br />• Modeled flow rates through the Red River. <br />• The water surface elevation for the southern embankment (staging/storage <br />area). <br />2. For stages at the Fargo Gage up to 43 feet, conduct modeling to determine: <br />• Modeled flow rates through the diversion channel. <br />• Modeled flow rates through the Red River. <br />• The water surface elevation for the southern embankment (staging/storage <br />area). <br />Deliverables: Provide a table of results. Use template developed by USACE. <br />II. LOCAL DRAINAGE PLAN. Complete the scope of work identified in AWD-00005, currently <br />being executed under City of Fargo contract No. 5683-5. <br />Deliverables: <br />1. Technical Memorandum – Local Drainage Plan for the FM Diversion Project. <br />2. PowerPoint Presentation. <br />III. REACH 1 LOW FLOW CHANNEL (LFC) MEANDER MODELING. <br />1. Model the Reach 1 LFC design developed by USACE using the RVR Meander software. <br />HMG_TO08-A10_Long.docx 4 <br />DR <br />A <br />F <br />T