June 10, 2003 is the 200th anniversary of the birth of Henry Philibert Gaspard Darcy (1803-1858). While best known for his research findings of Darcy's Law and the Darcy-Weisbach Equation, he was also a skilled engineer, public servant, and community leader. In celebration of the anniversary, this publication is a collection of 20 peer-reviewed contributions that address both Darcy and other pioneers in hydraulic history. Seven papers describe Darcy's achievements and legacy and include a paper contributed by Darcy's descendent and namesake. Additional essays address the contributions of Henry Bazin, G'nther Garbrecht, Hans Einstein, Victor Streeter, Carl Kindsvater, and Floyd Nagler. Historical developments in pumping equipment in medieval Europe and the USA in the 19th century, dam failures due to uplift, and the hydraulic engineering collection at the Smithsonian Institution are also reviewed. Finally, accounts for the Colorado State University, St. Anthony Falls and USDA-ARS laboratories are presented.