OCR Text |
Show COLUMBIA RIVER TREATY 423 in kilowatts for agreed critical stream flow periods and the increase in average annual usable hydroelectric energy output in kilowatt hours on the basis of an agreed period of stream flow record. 2. The dependable hydroelectric capacity to be credited to Canadian storage will be the difference between the average rates of generation in kilowatts during the appropriate critical stream flow periods for the United States of America base system, consisting of the projects listed in the table, with and without the addition of the Canadian stor- age, divided by the estimated average critical period load factor. The capacity credit shall not exceed the difference between the capability of the base system without Canadian storage and the maximum fea- sible capability of the base system with Canadian storage, to supply firm load during the critical stream flow periods. 3. The increase in the average annual usable hydroelectric energy will be determined by first computing the difference between the avail- able hydroelectric energy at the United States base system with and without Canadian storage. The entities will then agree upon the part of available energy which is usable with and without Canadian stor- age, and the difference thus agreed will be the increase in average annual usable hydroelectric energy. Determination of the jmrt of the energy which is usable will include consideration of existing and scheduled transmission facilities and the existence of markets capable of using the energy on a contractual basis similar to the then existing contracts. The part of the available energy which is considered usable shall be the sum of: (a) the firm energy, (b) the energy which can be used for thermal power displace- ment in the Pacific Northwest Area as defined in Paragraph 7, and (c) the amount of the remaining portion of the available energy which is agreed by the entities to be usable and which shall not exceed in any event 40% of that remainder. 4. An initial determination of the estimated downstream power benefits in the United States of America from Canadian storage added to the United States base system will be made before any of the Canadian storage becomes operative. This determination will include estimates of the downstream power benefits for each year until the total of 15,500,000 acre-feet of Canadian storage becomes operative. 5. Commencing five years before the total of 15,500,000 acre-feet of storage is expected to become operative, estimates of downstream power benefits will be calculated annually for the sixth succeeding year on the basis of the assured plan of operation for that year. 6. The critical stream flow period and the details of the assured plan of operation will be agreed upon by the entities at each determi- nation. Unless otherwise agreed upon by the entities, the determina- tion of the downstream power benefits shall be based upon stream flows for the twenty year period beginning with July 1928 as contained in the report entitled Modified Flows at Selected Power Sites-Colum- bia River Basin, dated June 1957. No retroactive adjustment in down- stream power benefits will be made at any time during the period of the Treaty. No reduction in the downstream power benefits credited to Canadian storage will be made as a result of the load estimate in the |