WSP02327 - Laserfiche WebLink

Home Browse Search

Ie. All depletions are to be distributed over the course of the year consistent with the goal of maintaining a relatively natural hydrograph as described in "Assumptions 7 and 8" above. The water remaining after allowing for full compact development to the 3.855 maflevel is available to the Board's instream flow right as Paragraph 3 water. A monthly instream flow call trigger will be set as indicated ij "Assumption 5" and described under "Administration I" in order to determine when a call should be placed. ~ 2. Paragraphs 3 and 4 may be defined either in the water right application or by agreement pursuant to the Enforcement Agreement and Board Policy. The amount of Paragraph 3 water is the amount of water physically available for instream flow needs after the Workgroup's development projections to reach the 3.855 maf development level, or such lesser level as may be agreed to, have been protected. 3. The Service may recommend, and the Board may find it necessary to set a lower instream flow limit which can not be violated by any junior water right development which occurs, regardless of hydrologic conditions, in order to protect against a complete dry-up of the river during drought periods to the extent possible with the recovery instream flow water right. It is suggested that the 80% exceedance values recommended by the Service establish this lower threshold value. The intent is that so long as compact water remains to be developed, junior water rights will not have to augment depletions so long as the minimum baseflows or Paragraph 3 flows for the endangered fish are maintained. Administration: 1. RUNOFF SEASON: To set the "monthly instream flow call trigger"; (1) determine the lowest 10 consecutive year total discharge volume at the Maybell gage for each month of the runoff season, April through July, using the study referenced in "Assumption 3", (2) determine the "lower limit of total consumption" allowance for each corresponding month and multiply it by 10, (3) subtract the 10- year development allowance volume from the lowest 10 consecutive year discharge volume for each corresponding month. The resulting volume becomes the "monthly instream flow call trigger" for determining whether or not a call should be placed during the following month or during the same month in the following year. For example, if the monthly instream flow call trigger was activated in April 1990, the decision would be whether or not to place a call in May 1990 or wait until April 1991 to place the call. The instream flow call trigger would not change unless modified by either the Board or Service. Periods other than a monthly time step could also be used. This approach allows the "monthly instream flow call trigger" and Paragraph 4 water to be modified without modifying the instream flow right. For purposes of administration during the runoff period, any time the call trigger 11-3