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<br />. <br /> <br />. <br /> <br />. <br /> <br />," ",.' ~ 6 <br />.Ju'::'Ju <br /> <br />MARKETING CRSP POWER FROM THE ASPINALL UNITS <br />(explanation of the following graphs) <br /> <br />. <br /> <br />The following two graphs are intended to represent how the production of <br />electrical energy at the Aspinall Units have changed since the operation at Glen <br />Canyon Dam and Flaming Gorge Dam were constrained to meet environmental <br />objectives downstream. The operation of each of the CRSP units are portrayed <br />both before and after the imposition of environmental constraints against the CRSP <br />customer electrical demand profile. <br /> <br />. <br /> <br />In 1996, the Secretary of Interior signed a Record of Decision (ROD) on the <br />operation of Glen Canyon Dam. This permanently changed and severely restricted <br />the operation of this dam. <br /> <br />. <br /> <br />The Three Aspinall powerplants are tied to the same Federal electrical system as <br />Glen Canyon Dam. Together, the Aspinall Units - Blue Mesa, Morrow Point, <br />Crystal - produce 280 MW of electrical power. The electrical energy produced <br />from these powerplants is enough to meet the needs of approximately 150,000 <br />households. <br /> <br />. <br /> <br />Prior to the ROp at Glen Canyon Dam, Western could meet the demand <br />requirements and "peaking" needs of its customers. For the most part the <br />generation at the Glen Canyon powerplant met these needs. The Aspinall Units <br />could be used for this purpose or they could be used to take advantage of market <br />opportunities. Any added revenues acquired by this activity was used to lower the <br />firm electric service rate to Western's CRSP customers. <br /> <br />. Since the ROD and since the implementation of further environmental constraints <br />at Flaming Gorge Dam (BO), the Aspinall Units perform a significantly different <br />service for Western's CRSP customers. <br /> <br />. The Aspinall powerplants now contribute a significant portion of the "peaking" or <br />"demand-following" requirements of Western's contractual obligations to its <br />CRSP customers. This summer, the Aspinall units produced about 45% of the <br />demand following of the CRSP power system. <br /> <br />. <br /> <br />These graphs were produced from actual data. The data were selected from two <br />time periods of approximately equal water release characteristics. However, <br />conditions represented in these graphs are significantly altered under different <br />hydrological conditions. <br /> <br />23 <br />