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001510 Affected Environment & Consequences 3-4 gauge data, the Sponsors' water budget model also utilized canal diversion data taken from Uncompahgre Valley Water Users' Association (UVWUA) water records. Details of the Sponsors' water budget model are described in the AB Lateral Hydropower Project Hydrology Report (HDR, 1995). 3.2.2 Impact of Alternatives Under the No Action alternative, the Uncompahgre Valley Water Users Association (UVWUA) would continue to divert water from the Gunnison and Uncompahgre Rivers to meet irrigation needs. Aspinall Unit operations are expected to result in a more natural hydrograph in the Gunnison River as efforts continue to recover downstream endangered fishes. With development, the Sponsors would divert additional water, as it is available, from the Gunnison River for purposes of generating electricity at the proposed AB Lateral Hydropower Project. Table 3-1 shows the average monthly flow through the proposed plant for Alternative E- 1, E-2, and E-3, Included in the amounts shown is the water needed for irrigation and the additional diversions for hydropower. Also shown in Table 3-1 is the amount of water that is ne.eded by the UVRP canal systems downstream of the proposed Project. This water is shown under the No Action alternative in Table 3-1. Under the No Action alternative, the downstream demands would not be altered; however, the method of delivering water to these demands would continue to be the South Canal and the Uncompahgre River. Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual Note: a. Includes irrigation flows for the Selig, Ironstone, and East Canals. Also includes Ironstone Canal water pFeviously diverted through the M&D Canal. Table 3-1. Average Flow through AB Lateral Hydro Project Alternative E-l 761 704 663 687 650 704 608 446 487 571 638 734 637 E-2 705 654 616 655 649 704 608 446 486 555 583 662 610 E-3 642 596 559 617 627 683 600 446 478 526 525 589 574 AS Lateral Hydropower Project Irrigation water use!l for power generation' o o 62 406 488 500 519 447 355 230 5 o 252 July 2QOO ~- ,-' ,.-' ~^