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OROVILLE DAM SPILLWAY INCIDENT- FAST-TRACK RECOVERY DESIGN AND CONSTRUCTION TO ADDRESS CRITICAL DAM SAFETY* Ted Craddock Project Manager, State of California, Department of Water Resources Leslie Harder Deputy Design Branch Chief, HDR Engineering, INC. Stephen Verigin Deputy Project Manager, GEI Consultants, INC. Jeanne Kuttel Chief, Division of Engineering, State of California, Department of Water Resources Dale Brown Deputy Project Manager, State of California, Department of Water Resources Mutaz Mihyar Oroville Spillway Recovery Program Manager, State of California, Department of Water Resources, Division of Safety of Dams Douglas Boyer Chief, Risk-Informed Decision Making Branch, United States, Federal Energy Regulatory Commission UNITED STATES OF AMERICA 1. INTRODUCTION Oroville Dam is located on the Feather River in northern California (USA). At 234.7 m (770-ft) tall, this earth embankment is the tallest dam in the United States. With its 4.3 billion m3 (3.5 million acre-feet) of storage, Lake Oroville is the second largest reservoir in California, supplying water to cities as far south as Los Angeles. The Oroville Dam, reservoir (Lake Oroville), and hydropower plant facility is the flagship of the State Water Project (SWP), which is owned and operated by the State of California, Department of Water Resources (DWR). * INCIDENT DE DÉVERSEMENT DE BARRAGE D'OROVILLE - CONCEPTION ET CONSTRUCTION DE RÉTABLISSEMENT RAPIDE DE PISTE POUR COMBLER LA SÉCURITÉ DES BARRAGES CRITIQUES 64