This document is an instructional module package prepared in objective form for use by an instructor familiar with the application of hydraulic principles for operation and maintenance of water supply systems, water distribution systems, wastewater treatment systems and wastewater collection systems. Included are objectives, instructor guides, student handouts and transparency masters. This is the first level of a two module series. The module is concerned with the study of fluid properties and their units, the continuity equation and its use in calculations, flow measuring devices, frictional head loss in open channels and in pipes by the Chezy-Manning method and by the Hazen-Williams method, and hydraulics of sewers flowing full and partially full. (Author/RH)