The GM of SFPUC kept saying that deliveries are different from long term sustainability. I kept telling him I was not making that artificial dichotomy. The historical points we have are intersections of demand and supply. I always say deliveries at then current prices.
The modeler over estimated dam capacity by approximately 20%. He presented aggregate annual data. The water SF receives is seasonally determined. SF has a high bar from April-June. A lower bar from mid-June to mid-April when there is considerably less water in the Tuolumne River (we receive 85% of Hetch Hetchy supplies from the TR). He ignored the impact of global warming and assumed the future system would have a 100 percent batting average in terms of reliability. He never answered the question: Why in 2000, usuing the same assumptions, did BAWSCA (BAWUA) and SFPUC estimate Hetch Hetchy sustainability at 239 million gallons per day and now say it is greater than 265? Of course it can be greater than 265 MGD by overriding real storage constraints and believing that we can dry up the river?
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