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information on resource conditions is obtained. The schedule for the hydrograph begins prior to the planned Labor Day monitoring flows. Iterative planning is recommended as the 1999 Water Year inflow pattern develops. ~ August-December 1998: Evaluate status of sediment in the system. Consider maintaining flows as low as practicable to conserve recent tributary sediment inputs. Over the Labor Day weekend, conduct aerial photography and monitoring low flows (8,000 cfs) as planned to continue the annual baseline data collection on Canyon sediment resources. ~ December-February: Evaluate new inflow data projections for Lake Powell and consider appropriate actions. ~ March-April 1999: If forecast data show a significant risk of releases above power plant capacity, conduct a 2-4 day BHBF of 44,000 cfs2. Steady flows at the mean flow or at the lowest regularly achieved minimum flow would be proposed to immediately precede or follow this event for photo-documentation. Such flows would best be conducted in late March/early April, as in 1996. ~ May-December: Based on hydrologic and resource conditions, run the lowest possible daily releases that prevent unanticipated spills or exceptional flows. Consider pulses up to power plant capacity if significant sediment input occurs from tributaries. Develop the draft 1999 State of the Colorado River Ecosystem Report for the AMWG and AOP planning process. ~ Thereafter, repeat the cycle, continuing to assess the inflow probabilities and the state of the resources for the next year's planning process. 2 Consultation with the U.S. Fish and Wildlife Service is required for endangered species issues. Consultation with Western is needed regarding power delivery conunitments. Funding for high flows research also requires further discussion. [WORKING DRAFT 2 . GCMRC: 12/04/98] 8