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<br />'" <br />.l ~ <br /> <br />TUESDAY <br /> <br />JANUARY 9, 1979 <br /> <br />- <br /> <br />HYDROLOGY <br />As a gross check, compare Ridgeway with Philpott. <br /> <br />- <br /> <br />Characteristics <br />Drainage area-square miles <br />Area-top of power pool-acres <br />Dam height-feet <br />Maximum power head-feet <br />Minimum power head-feet <br />Maximum generating water flow-cfs <br />Generating capacity-kw <br />Average annual produced energy-kwh <br /> <br />TAB LEI <br />Proposed <br />Ridgeway <br />529 <br />2,400 <br />110 <br />84 <br />73 <br />2,875 <br />17,250 <br />30,508,000 <br /> <br />Philpott <br />212 <br />2,800 <br />220 <br />164 <br />110 <br />1,250 <br />14,000 <br />25,400,000 ('54-'70) <br />35,737,000 (7/77-6/78) <br /> <br />Considering the above - <br />Ridgeway drainage area is more than twice Philpott. <br />Ridgeway power head is at least half Philpott. <br />Ridgeway generating water flow is more than twice Philpott. <br />Average annual energy is approximately equivalent. <br />These comparisons suggest the Ridgeway proposed average energy production <br />is reasonable. <br /> <br />Examining the short term situation (Beck considers only the 37 year period) <br />shows the following for a one year or one month average: <br /> <br />To produce 30,508,000 kwh with 17,250 kw units requires operation for <br />about 1,769 hours per year with a water flow rate of at least 2,875 <br />cfs. The annual water need is therefore 421,000 acre-feet or 35,000 <br />acre-feet per month average. <br /> <br />Evaluation of the above using EXHIBIT 3 indicates: <br /> <br />,';~ <br /> <br />The 37 year average annual flow is 432,417 acre-feet; more than the <br />421,000 needed. <br />During the 20 year period from October 1951 thru September 1972 the <br />flow equaled or exceeded 421,000 acre-feet in only seven years. <br />During the 3 years from October 1966 thru September 1969, the total <br />flow was 326,812 + 241,455 + 302,714 = 871,307 acre-feet or about <br />2.07 years of 11average flow" during the 3 year period. <br />The average monthly flow (35,000 acre-feet) is not met for the 37 <br />year average in June, July, August, September, October or November. <br />These six months include the high demand period. (EXHIBIT 12). <br /> <br />The last three items will lower energy earnings and should be considered <br />for project financial planning. <br /> <br />Evaluation of water flows to meet demand electrical needs using EXHIBITS <br />4 - 9 & 12 indicates the following: <br />