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Quantities in acre-feet Recordec1 flow at Otowi .....'.............................. 1,079,000 Adjustment for release 'of imported water: Heron No. 4 release of' imported water... - 102,000 New and increased depletions exclusive of change in storage between Heron Reservoir and otoWi.................... + 5,000 Net adjustment..................~..........O..9...... - 97,000 Adjustment f'ortributary units above otowi: Change in storage tributary units,...... - Net reservoir losses tributary units. . .. + New and increased depletions, tributary un! t areas......................""............................ + 10,000 1,000 28)000 Change in Gl1lannel losses from tributary unit areas to otowi.................... - 1,000 Net adjustment.................................... + 18,000 Otowi flow pre-project condition...........,........... 1,000,000 To evaluate the item "new and increased depletions, tribu- tary unit areas" of' the above table it will be necessary to determine the consumptive use that would have occurred under pre-projeGt Gondi- tions. This determination can be made from the aerial photographs and land culture studies of' the tributary unit areas, applying appropriate factors to reflect climatic conditions (e.g., temperature and effective rainfall) and water supply conditions for each year. Other Compact Requirements The f'ollowing articles from the Rio Grande Compact are quoted partially or entirely: "ARTICLE VI "."...In the case of New Mexico, the accrued debit shall not exceed 200,000 acre-feet at any time, except as such debit may be caused by hold-over storage of water in reservoirs constructed after 1929 in the drainage basin of the Rio Grande between Lobatos and San Marcial. Within the physiClal limitations of storage capacity in suCh reservoirs, New Mexico shall retain water in storage at all times to the extent of its aClcrued debit. In computing the magnitude of accrued credits or 15