EXH AR023805: Email Chain – Non-Hydrologic Effects Water Rights Relinquishments & Summer Low Flow Analysis

In a July 2, 2001 email chain, Kelly Whiting of Metro King County raises concerns about the analysis of 'non-hydrologic' effects related to water rights relinquishments and their impact on summer low flows in a Sammamish River watershed study. Whiting questions the assumptions made about non-respondents to a water withdrawal survey, arguing that the rates assigned to them appear disproportionately high compared to trends shown by actual survey respondents. The email requests a walkthrough during an upcoming Thursday meeting to clarify how these figures would be incorporated into a low-flow mitigation plan.

Notes

Email chain dated July 2, 2001 among Kelly Whiting (King County Metro), Ann Kenny, Rachel McCrea (Floyd Snider McCarthy), and others regarding non-hydrologic effects of water rights relinquishments associated with Third Runway EIS document D7. Whiting raises unresolved concerns about how relinquishment of water withdrawals will be incorporated into the low-flow mitigation plan, the assumed timing of withdrawal rates (sustained for a few hours per day, not every day), and the logic behind assumptions for survey non-respondents — specifically that non-respondents were assumed to withdraw water at rates higher than the survey trend would indicate. Whiting argues that if 80% of respondents indicated no water withdrawal, 80% of non-respondents should be assumed the same, with rates weighted by parcel size. Joe Brascher is identified as responsible for incorporating the water withdrawal table into the low-flow impact analysis. AR 023805–023806.

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