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VOLUME 2 <br />ISSUE 3 <br />OCTOBER 2014 <br />Introduction……………………………………….….. 1 <br />Soil Characterization (Part 2) – Laboratory and <br />Field Shear Strength Testing………..….……...…. 2 <br />How Low Can You Go? The Needs and Considerations for Outlets……....………….13 <br />Dam Overtopping Failures – Lessons Learned from the September 2013 Colorado <br />Flood Event…………………………………………………………………………...………….19 <br />1 <br />A QUARTERLY PUBLICATION FOR WESTERN DAM ENGINEERS <br />Comments/Feedback/Suggestions? <br />Email Colorado Dam Safety to submit feedback on Articles. <br />Please use article title as the subject of the email. <br />Upcoming ASDSO Webinar Dam Safety Training: <br />x Foundation Preparation During Dam Construction, <br />by John France, P.E., October 14, 2014 <br />x Rehabilitation of Concrete Dams, by Robert Kline, P.E., <br />November 12, 2014 <br />x Earthquake Hazards and Ground Motions, by Lelio <br />Mejia, Ph.D., P.E., and William Fraser, December 9, 2014 <br />Upcoming Classroom Technical Seminars: <br />x Inspection and Assessment of Dams, November 5-7, 2014 <br />Austin, TX <br />ASDSO Training Website Link <br />In this issue of the Western Dam Engineering <br />Technical Note,we present articles on shear strength <br />testing, reservoir outlet considerations, and some <br />lessons learned from the September 2013 Colorado <br />flood event . This quarterly newsletter is meant as an <br />educational resource for civil engineers who practice <br />primarily in rural areas of the western United States. <br />This publication focuses on technical articles specific <br />to the design, inspection, safety, and construction of <br />small dams. It provides general information. The <br />reader is encouraged to use the references cited and <br />engage other technical experts as appropriate. <br />The Western Dam Engineering Technical <br /> Note is sponsored by the following <br /> agencies: <br />6 Colorado Division of Water Resources <br />6 Montana Department of Natural <br />Resources <br />6 Wyoming State Engineer’s Office <br /> This news update was compiled, written, <br /> and edited by URS Corporation in Denver, <br /> Colorado <br /> Funding for the News Update has been <br /> provided by the FEMA National Dam Safety <br /> Act Assistance to States grant program. <br />Article Contributors: <br /> URS Corporation: Julie Heitland; Fernando <br /> Castaneda, PE; Ed Villano, PE; <br /> Jennifer Williams, PE; Jason Boomer, PE; <br /> John France, PE <br />Editorial Review Board: <br />Michele Lemieux, PE, Montana Dam Safety <br />Program Supervisor; Bill McCormick, PE, PG, <br />Colorado Chief Dam Safety Branch; <br />Mike Hand, PE, Wyoming Dam Safety <br /> Program; Mark Ogden, PE, Association <br /> of State Dam Safety Officials; <br /> Matthew Lindon, PE, Loughlin Water <br /> Associates; and Steve Becker, PE, <br /> Natural Resources Conservation Service <br />The material in this publication has been prepared in accordance with generally recognized engineering principles and practices, and is for general information only.The information <br />presented should not be used without first securing competent advice from qualified professionals with respect to its suitability for any general or specific application. No reference made in <br />this publication constitutes an endorsement or warranty thereof by URS Corporation or sponsors of this newsletter. Anyone using the information presented in this newsletter assumes all <br />liability arising from such use.