United States Society on Dams Celebrating the Value of Dams and Levees — Yesterday, Today and Tomorrow 36th Annual USSD Conference Denver, Colorado, April 11-15, 2016 CONTENTS Conference Theme *Is This Community Worth Saving? ....................................................................................1 Robert Beduhn, HDR *Unintended Consequences of Dam Removal .....................................................................3 Melinda Dirdal, Greg Paxson and Dave Campbell, Schnabel Engineering *The Kentucky River: Managing 19th Century Infrastructure to Meet 21st Century Needs ....................................................................................................................................5 Daniel A. Gilbert, Jeffrey S. Dingrando and April L. Welshans, Stantec Consulting Services, Inc.; and David Hamilton, Kentucky River Authority *Historical Perspective — Dams, Hydro, and Multi-Purpose Projects ..............................7 David Kleiner, MWH Would Texas Be Texas Without Dams? ...............................................................................9 John L Rutledge, Freese and Nichols, Inc. Discussing the Benefits of Dams with your Friends and Neighbors, the Media, and the Guy Sitting Next to You on the Plane ...........................................................................11 Amanda Sutter, Corps of Engineers A Race Against Time, America’s Flood Risk from Aging Dams .......................................13 Jason Wilson, Southern Company Hydraulics *Use of Labyrinth Piano Key Weir (PKW) Spillway to Improve Dam Safety for a Large Set of Dams ...........................................................................................................15 Frédéric Laugier, Julien Vermeulen and Thomas Pinchard, EDF-CIH *Ensuring Water Supply Reliability with Innovative PK Weir Spillway Design ...............17 G. Robblee, S. Kees and B.M. Crookston, Schnabel Engineering; and K. Keel, Town of Hillsborough *Importance of Site Considerations for Labyrinth Spillway Hydraulic Design — Upper Brushy Creek Dam 7 Modernization ......................................................................19 Tina Stanard and Victor Vasquez, Freese and Nichols, Inc.; Ruth Haberman, Upper Brushy Creek Water Control and Improvement District; Blake Tullis, Utah State University; and Bruce Savage, Idaho State University *Complete paper included on flash drive v Using HEC-RAS 2 Dimensional Capability for Dam Break Analysis ...............................21 Wesley Crosby, Corps of Engineers Combined 1-D and 2-D Modeling with HEC-RAS for Elk City Dam ................................23 Samantha Palmason, Corps of Engineers 2D or not 2D: Cases Studies in Application of HEC-RAS 5.0 2-Dimensional ..................25 Modeling Capabilities Kevin Ruswick and Gregory Daviero, Schnabel Engineering *Automated Incremental Hazard and Sensitivity Analysis of a Hypothetical Dam Breach Model .....................................................................................................................27 Mikell Warms, Dan Christensen and Christopher Goodell, WEST Consultants, Inc.; and Cynthia Oestreich, Aista Utilities HEC-MetVue — Tool for Real-time Forecasting; Analyzing, Transposing and Rotating Storms; Development of Design Storms ..............................................................29 Simeon Benson, Corps of Engineers *GSSA Modeling for Analysis of Flood Design Features at the Picayune Strand Restoration Project ............................................................................................................31 Charles W. Downer, Jaime A. Graulau-Santiago, Brian E. Skahill, David M. Weston, Nawa Raj Pradhan and Aaron R. Byrd, Corps of Engineers *Using the Variable Infiltration Capacity Model in a Semi-Stochastic Format for Hydrologic Hazard Estimates for Dam Safety Risk Analysis ............................................33 Frank Dworak, Bureau of Reclamation *Dynamic Desert Floods at a Dry Dam ............................................................................35 Robert A. Eichinger, Zachary Whitten and Michael Gerlach, Stantec Consulting Services, Inc. *Cultivating Ingenuity and Safety In Alabama: The Taming of Lake Ogletree Reservoir ...........................................................................................................................37 James R. Crowder, Brian M. Crookston, Bradley T. Boyer and J. Tyler Coats, Schnabel Engineering *Replacing Ruby Dam Outlet Uses Computational Fluid Dynamics to Model Energy Dissipation .........................................................................................................................39 Frank Lan, Robert Waddell and Michael Zusi, AECOM; and Brian Grant, Montana DNRC *Reducing Scour with Flow Splitters, Extension Fins and Computational Fluid Dynamics............................................................................................................................41 Duane McClelland and Daniel Morse, CH2M; and Nathan M. Gullo and Jason A. Eichler, LCRA *Complete paper included on flash drive vi *Sediment Transport Analysis in Support of Prado Basin Sediment Management Project ................................................................................................................................43 Craig P. Baxter, Golder Associates Inc.; Nathan Scheevel, Scheevel Engineering, LLC; and George W. Annandale, Golder Associates Inc. *Verification of Sediment Yield Calculations in the Arid Southwest .................................45 Brian Wahlin and Jesse Piotrowski, WEST Consultants, Inc.; and Chuck Davis, Beaver Creek Hydrology *Post-Removal Reservoir Erosion: Elwha Dam and Glines Canyon Dam Removals, Washington ........................................................................................................................47 Jennifer A. Bountry, Bureau of Reclamation; Andy Ritchie, National Park Service; and Timothy J. Randle, Bureau of Reclamation *Unit Hydrograph Peaking Factors and their Application to PMF Simulations ..............49 Michael Bartles and Matthew Fleming, Corps of Engineers *Areal Reduction Factors — Colorado Front Range and Analysis of the 2013 Storm .........................................................................................................................51 Doug Hultstrand and Bill Kappel, Applied Weather Associates, LLC *Evaluating Effort Levels of Inflow Design Flood Study Methods for Dams ....................53 S. Samuel Lin, Federal Energy Regulatory Commission; and Jason E. Hedien, MWH Americas, Inc. Utilizing Regional Precipitation Frequency Relationships for Multiple Storm Types or Probabilistic Flood Hazard Assessment in the Tennessee River Watershed ......55 Mel Schaefer, MGS Engineering; Keil Neff, Tennessee Valley Authority; Shaun Carney, Riverside Technology, Inc; Bruce Barker, MGS Engineering; George H. Taylor, Applied Climate Services; and Curt Jawdy, Tennessee Valley Authority Young Professionals How Do They Do It? The Struggle of Juggling a Career and Parenthood and Feeling Successful in Both .................................................................................................57 Karen Aguillard, AECOM A Young Engineer’s Personal Experience at a Geotechnical Construction Materials Testing Firm and a Water Resources Design Firm ...........................................................59 Jim P. Kirch, RJH Consultants, Inc. Red Rock Hydroelectric Project — Generating Power from Iowa’s Largest Lake ...........61 Rachael V. Bisnett, MWH *Complete paper included on flash drive vii Dam Risk Assessment’s Role in Preparing for Climate Change .......................................63 Jessie Drayton, AECOM Modeling Efficient and Sustainable Hydroelectric Production at Small Dams through Artificially Induced Streamflow and Application of System Control ...................65 Rafey A. Siddiqui, Colorado State University; Bilal A. Siddiqui, DHA Suffa University; Ryan T. Bailey, Colorado State University; and Arif I. Osmani, Osmani & Co. Pvt. Ltd Assessment of Changing Climate on River Discharge in Regions with Lack of Hydrological Data .............................................................................................................67 Fariborz Nasr-Azadani, West Virginia University Use of Inverse Analysis of Pore Water Pressures to Estimate Changes in Hydraulic Conductivity Resulting from Backward Erosion ................................................................69 Carolyne Bocovich, Wim Kanning and Michael Mooney, Colorado School of Mines From Runways to Spillways: A Case Study from the Aerospace Industry on Adoption of Non-Destructive Inspection Tools with Lessons for the Dam Safety Community .........................................................................................................................71 Minal L. Parekh, Colorado School of Mines; and Jennifer Schneider, Boise State University Influence of Vertical Loading Conditions and an Overlying Cohesive Material on the Initiation of Backwards Piping Erosion.......................................................................73 Joy C. Foley and Mary G. Weiss, Colorado School of Mines Stuck between a Dam and a Small Space ..........................................................................75 Micah S. Smidt, RJH Consultants, Inc. Considerations During Site Exploration Activities............................................................77 Marie A. Maher and Derek L. Hodnett, Terracon Consultants, Inc. *Phased Investigation Approach for a Partial