Laserfiche WebLink
February 3, 2016 <br />Project: Inundation Mapping for Summit Main Dam, Summit South Dam, and A.M. Puett Dam <br />Vendor: Summit Reservoir and Irrigation Company <br /> Ms. Laura Wagner, Secretary/Treasurer <br /> P.O. Box 127 <br /> Dolores, CO 81323 <br /> Phone / email: 970-565-0156 / SummitReservoir@gmail.com <br /> <br />Consultant: Davis Engineering Service, Inc. <br /> Mr. Mike Davis, P.E. <br /> P.O. Box 1208 <br /> Pagosa Springs, CO 81147 <br /> Phone / email: (970) 264-5055 / mike_d@centurytel.net <br /> <br />CWCB funding source: Severance Tax Trust Fund Operational Account <br /> <br />SCOPE OF WORK <br />Davis Engineering Services, Inc. (Consultant), at the direction of the Summit Reservoir and Irrigation <br />Company (Vendor), will perform dam breach modeling studies and associated flood inundation mapping <br />for the above dams. Summit Reservoir has two separate embankments referred to as the Main Dam <br />and South Dam. Summit Main Dam is a High Hazard dam which flows into Lost Canyon Creek. Summit <br />South Dam is also a High Hazard Dam and flows into the East Fork of Mud Creek. A. M. Puett Dam <br />(Puett Dam) is a High Hazard dam located on Cash Canyon. The above dams are located in Montezuma <br />County in the Colorado River Basin south east of Dolores, CO. <br /> <br />Consultant or Vendor will submit the final report and mapping to the Colorado Division of Water <br />Resources, Dam Safety Branch, for approval. Grant funds will not be disbursed until the project has been <br />approved by the Dam Safety Branch. <br /> <br />PROPOSED METHODOLOGY <br />The Consultant shall perform a clear dam breach analyses in accordance with the State of Colorado <br />Rules and Regulations for Dam Safety and Dam Construction (1/1/2007), and the Dam Safety Guidelines <br />for Dam Breach Analysis (2/10/2010). Correspondence shall be with Matt Gavin, P.E., of the Colorado <br />Division of Water Resources, Dam Safety Branch, to present preliminary dam breach parameters, water <br />surface profile modeling, and inundation mapping and to determine if field measurements are necessary <br />for critical bridges. <br /> <br />Inundation mapping for High Hazard dams shall show the calculated extents of the dam breach flood <br />wave. The mapping will also include cross sections at critical locations showing lateral and vertical flood <br />extents, flood wave velocity, and flood wave arrival time. Inundation mapping shall be extended <br />downstream to a location where no potential for loss of life and/or no significant property damage exist. <br /> <br />Inundation mapping for Significant Hazard dams shall show the route of the dam breach flood wave, the <br />estimated time of arrival of the flood wave at critical sections, and the estimated lateral extent of <br />inundation. The inundation mapping shall be extended downstream to a location where no significant