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Table 6 <br />Conejos River Diversion Ditches Regularly Receiving Water <br />From General Pool Storage at Platoro Reservoir <br />Structure ID Structure Name <br />1. 220501 <br />2. 220502 <br />3. 220504 <br />4. 220524 <br />5. 220541 <br />6. 220553 <br />7. 220554 <br />8. 220591 <br />9. 220593 <br />10. 220604 <br />11. 220616 <br />12. 220619 <br />13. 220624 <br />14. 220627 <br />15. 220630 <br />16. 220631 <br />17. 220644 <br />18. 220646 <br />19. 220651 <br />20. 220692 <br />ALAMO DITCH <br />ANCON DITCH <br />ANTONITO DITCH <br />CANON IRRIGATING DITCH <br />EPHRAIM D DITCH <br />GUADALUPE MAIN DITCH <br />HEADS MILL & IRG DITCH <br />MAGOTE DITCH <br />MANASSA DITCH NO 3 <br />MECITOS DITCH <br />RICHFIELD CANAL <br />ROMERO DITCH <br />SAN JUAN SAN RAFAEL DITCH <br />SANFORD DITCH <br />SELEDONIA VALDEZ DITCH <br />SERVIETTA DITCH <br />TROGILLIO DITCH <br />VEGA DITCH <br />WILLIAM STEWART DITCH <br />GARCIA DITCH <br />Area Capacity Tables <br />General Pool <br />Account Size (a~ <br />500 <br />250 <br />250 <br />500 <br />1,000 <br />250 <br />500 <br />500 <br />2,500 <br />500 <br />500 <br />2,000 <br />500 <br />500 <br />500 <br />250 <br />250 <br />250 <br />250 <br />250 <br />Area-capacity tables for explicitly represented reservoirs are included in the Rio Grande surface <br />water model to allow calculation of evaporative losses based on reservoir content. Area-capacity <br />data were obtained for explicitly modeled reservoirs in Colorado were obtained from the Division <br />3 office. Area-capacity data for Costilla Reservoir was obtained from the New Mexico State <br />Engineer's Office. <br />As previously noted, Eastdale Reservoir No. 1 and Eastdale Reservoir No. 2 are combined into a <br />single reservoir ("EastRes") for simplifying purposes in the Rio Grande surface water model. An <br />area-capacity table was estimated for EastRes by simply combining (adding) area-capacity data for <br />the two individual reservoirs. <br />Lake SurFace Evaporation <br />Evaporation data in Division 3 is somewhat sparse, with historical data available at only five <br />stations. Of these stations, only one (Alamosa WSO AP) is still active. Precipitation data on the <br />other hand, is collected at 27 stations in Division 3, of which 15 were active through 1997. <br />Net evaporation values for use in the Rio Grande surface water model were developed by <br />averaging data at selected precipitation and evaporation stations and taking the difference. Lake <br />evaporation was determined using a coefficient of 0.7 to adjust from pan evaporation data. Two <br />different sets of net evaporation values were developed; one for areas within the San Luis Valley <br />floor, and one for mountainous areas. Reservoirs were then assigned one of the two sets of net <br />C:Acdss\Task6-8.doc Prepare Reservoir Files September 7, 1999 -Page 5 of 7 <br />