Challenges for Debris-Flow Mitigation in Colorado : Helpful Ideas from Recent Research -- Debris-Flow Hazard Assessment and Model Validation, Medano Fire, Great Sand Dunes National Park and Preserve, Colorado -- Use of Rockfall Rating Systems in the Design of New Slopes -- Evaluation of a Sinkhole at Beaver Park Dam, Colorado, Guided by Risk Analysis -- Seismic and Electrical 3D Imaging to Aid in Landslide Remediation Design, East Fork Landslide, Wolf Creek Pass, Colorado -- Photogrammetric Methods and Geologic Discontinuity Mapping for Spillway Modifications, Pathfinder Dam, Wyoming -- Use of Photogrammetric Measurements in a Concrete Damage Survey : Guernsey Dam South Spillway -- Balloon Photogrammetry along the Middle Fork John Day River, Oregon -- Templeton Gap Floodway Levees, Investigation, and Mitigation of Mine Subsidence -- The Misbehavior of the Laramie Formation Claystones -- Effective Use of an Underdrain System in Construction on Expansive Subsoils -- Application of Coulomb's Method to Reinforced Soil Structures -- Bedrock Settlement beneath a Large Embankment Dam -- Drilled Shaft Responses under Pre-Torsion Lateral or Vertical Loads -- Behavior of Full-Scale Energy Foundations in Denver, Colorado -- Geotechnical Challenges for the South Coast Water District Tunnel Rehabilitation and Sewer Pipeline Replacement Project.