May 1932 PARSHALL FLUMES OF LARGE SIZE BY R. L. PARSHALL, Senior Irrigation Engineer Bulletin 386 Twenty-foot Parshall Measuring Flume, for Bijou Canal, South Platte River Valley, near Greeley, Colorado Basedon data gathered under cooperation agreement between the Bureau of Agricultural Engineering, U. S. Department of Agriculture and the Colorado Agricultural Experiment Stataion Fort Collins Colroado Agricultural College Colorado Experiment Station