03-13-2014
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<br />HMG_TO9‐A10_Long.docx 4 <br />Scope: <br />I. Participate in USACE design team meetings, Local Sponsor/Local Consultants Technical <br />Team (LSLCTT) meetings, and workshops as requested. <br />II. Provide technical assistance for physical modeling of hydraulic structures. <br />III. Provide hydrology information, as requested, to USACE. <br />IV. Provide additional assistance as requested. <br />Deliverables: Meeting minutes. <br />F. ON‐CALL SERVICES: <br />Respond to requests for services from PMC for tasks not identified to date. Requests will be <br />provided by PMC in writing. Work will not be performed by Engineer without authorization by <br />PMC or Owner. <br />Deliverables: On‐call service deliverables as requested. <br />I. EXTREME RAINFALL EVENTS – Complete the work originally authorized in AWD‐00016 <br />and deliver the final report. The scope of work specified in AWD‐00016 was: <br />1. Develop a Technical Memorandum (TM) that determines whether or not a <br />meander belt width of 200 feet is sufficient to allow establish a low‐flow <br />channel that is in dynamic equilibrium, and if so, provide sufficient information <br />and criteria for others to design the four (4) low‐flow channel reaches: <br />a. Diversion Outlet to Lower Rush <br />b. Lower Rush to Drain 14 <br />c. Drain 14 to Drain 21C <br />d. Drain 21C to Diversion Inlet <br />The focus of this meander belt width analysis is on the reach Diversion Outlet <br />to Lower Rush. Meander belt width for other reaches will be confirmed in <br />subsequent analyses. <br />The Final Feasibility Report includes a grade control feature across the entire <br />width of the main section of the diversion channel every 5,000 feet along the <br />length of the diversion. The use of grade control to set some constraints on the <br />low‐flow channel migration rates within the meander belt width should be <br />considered as part of this study. The distance between grade control features <br />can be modified if warranted. Discuss, and if appropriate, recommend other <br />methods to limit meander belt width. <br />The following data will be provided by the Diversion Authority at the <br />commencement of the work effort: <br />a. Soil test data to include Atterberg limits and gradations, boring log <br />plates, boring location diagrams, and boring profile plates <br />b. Sediment grain size distribution and sediment transport (both as <br />bedload and in suspension) data that has been collected recently by <br />the US Geological Survey and West Consultants, including low and <br />high flow events, for streams near the proposed diversion, including <br />the Rush, Lower Rush, Maple and Sheyenne rivers <br />DR <br />A <br />F <br />T
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