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SWC Project #1751-06 July 30, 2002 Agreement for Cost Participation by the North Dakota State Water Commission in the Digital Aerial Survey Phase I and II Itydraulie Analysis and Mapping Project 1. PARTIES. This agreement is between the State of North Dakota (State), by and through the State Water Corrnnission (Commission), through its Secretary, Dale L. Frink (Secretary); and the Cass County Commission (County), acting through its Chairman, Alon Wieland. 2. INTENT. The $17,325 granted by the State Engineer to the County on June 24, 2002 will be utilized for the County's Digital Aerial Survey Phase I and II Hydraulic Analysis and Mapping Project (Project). 3. PROJECT DESCRIPTION AND LOCATION. The Project consists of the hydraulic analysis and floodway mapping for the Red and Wild Rice Rivers, and additional engineering analysis for the Wild Rice and Sheyerme Rivers. In North Dakota, the Project extends into the Townships of Barnes, Stanley, Warren, Pleasant, and Normanna in southern Cass County and Walcott Township in northem Richland County. In Minnesota, the Project extends into the Townships of Moorhead. Kurtz, and Holy Cross in southwestern Clay County. The existing channel cross section data of the Wild Rice River will be used in the hydraulic analysis and the data extended into the over bank areas. Hydraulic profiles will be run through the study reach for the 10, 50, 100, and 500-year floods, and a floodway will be mapped for this reach of the Wild Rice River. Additional engineering analysis will be conducted to farther define the impact of the overflows from the Wild Rice and Sheyenne Rivers to ihrther define the hydrology for the Wild Rice River. The hydraulic analysis and floodway mapping for the Red River will be extended northward 1.5 miles to the southern city limit of the city of Manrhead. Existing channel cross sections will be used for the hydraulic analysis. Hydraulic profiles will be run through this reach for the 10, 50, 100, and 500-year floods and a floodway mapped for this reach of the Red River. The analysis and mapping will be used to update the Federal Emergency Management Agency's Flood Insurance Restudy/Study.