Contents: Hetch Hetchy water supply, general -- Folder A. Critical study of natural flow at La Grange; A description of the procedure in determining the methods of estimating the annual quantities from 1896 through 1917; Summary of study of Tuolumne River Watershed -- Folder B. Hydrographs of the actual and natural stream flow of the Tuolumne River at La Grange showing effect of San Francisco's reservoirs and Don Pedro Reservoir -- Folder C. Draft studies of San Francisco's Tuolumne River Watershed, in accordance with provisions of the Raker Act -- Folder D. Additional water available to San Francisco determined on the basis of historical use by the irrigation districts -- Folder E. Water put to storage by San Francisco in Lake Eleanor and Hetch Hetchy reservoirs, 1918-1934 -- Folder F. Water put to storage by San Francisco in Lake Eleanor and Hetch Hetchy reservoirs in excess of the computed quantity available to San Francisco -- Folder G. Use by San Francisco for the development of power of stored water released from Lake Eleanor and Hetch Hetchy reservoirs, 1918-1934 -- Folder H. Historical quantities of water put to storage and released from storage in the Turlock and Modesto Irrigation Districts' foothill reservoirs (Owen and Dallas-Warner) -- Folder J. Historical use by the Turlock, Modesto and Waterford Irrigation Districts of the Tuolumne River inflow to Don Pedro Reservoir.