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I I (Fes/l/ca spp.), little barley (Hordeum pusillium), and cheatgrass (Bromus tec/orum). Shrubs include greasewood (Sarcoba/l/s vermiculatus), four-wing saltbush (A/riplex canescens), shadscale (A. confer/ifolia). and sagebrush (Ar/emisia spp.) (BHP 1992). The area around the weir and along the river supports Russian olives (Eleagnus anglls/ifolia), bulrushes (Scirpus sp.), cattails (Typha la/if alia), and sedges (Carex sp.). A small wetland. located immediately downstream from the pump station, contains ...:11___ _ 1.__' __ _L _ _ _ _ ~_ "1_ _ _ -.l _ _ .. _ _ _ . _ _ _ 11 .1 I.'. , r- .,. ... r.' . nIIIU.......;:'). UUlllI:'lII!;;:'l, "-dUd, I:), d.IIU ;:')l;Ugl,;:'l. /"\ ;:')llldll WClldllU 1IIdllli::l~ IUIIIICU Ot:IUW lnt: lUt: VI lilt:: ~luragt; reservoir supports an established stand of cattails, bulrushes, and grasses. Most of the seepage water that feeds this wetland is collected and pumped back to the reservoir. SJGS reports seepage of 0.8 acre foot per month to the State of New Mexico. I I I A variety of mammals, birds, reptiles, amphibians. and fish have been observed in the vicinity of SJGS. Mammal, bird, reptile, and amphibian species observed in a survey conducted in 1992 are listed in Table 3 (BHP 1992). I I The 11 O-surface-acre storage reservoir provides aquatic habitat for several fish species that have been introduced into the reservoir and habitat for a significant number of waterfowl, ducks, geese, and shorebirds. A 1990 survey of the reservoir (Ecosystem Research Institute 1990) collected seven species offish in the reservoir, only one of which was native (flannelmouth sucker [CalOslOmus la/ipinnis]). Channel catfish (Ictalurus puncta/us). largemouth bass (Microp/erlls salmoides), and common carp(Cvprinus carpio) were the most abundant species collected (Table 3). Water is pumped to the reservoir from the San Juan River and from the reservoir to SJGS through buried pipelines. While water seeps through the toe of the dam resulting in the creation and maintenance of a wetland (approximately 3 acres in size) below the reservoir, the water is pumped back into the reservoir from immediately below the wetland. Water is not allowed to overtop the reservoir. Consequently, fish in the reservoir cannot move from the reservoir back into the Shumway Arroyo or to the San Juan River. I I I I The SJGS weir is located on the San Juan River, that historically has provided a warmwater habitat to the aquatic community. Since Navajo Dam began operation in 1962, releases of the water from the bottom of the reservoir have changed the character of the river to a coldwater habitat from the dam to Farmington. The river at the SJGS weir has returned to warm water. Surveys of the fish community in the vicinity of the SJGS weir have been made as part of studies for SJRRJP for endangered fish in the river. The most abundant species collected in the reach of river from Farmington to the SJGS weir are the same as those collected in downstream reaches which include: flannelmouth sucker, bluehead sucker (C discobolus), common carp, speckled dace (Rhinich/hys osculus), and channel catfish (Ryden and Pfeifer 1994). Fathead minnows (Pimephales promelas) and red shiners (Cyprinella Iwrensis) are also known from the San Juan River in the vicinity of the SJGS weir (NMGFD 1995) (Table 3). I I I The SJGS weir is located within an area designated as critical habitat for the Colorado pikeminnow (formerly known as the Colorado squawfish) and upstream from critical habitat for the razorback sucker. USBR, the USFWS. the Bureau of Indian Affairs (BIA), the States of New Mexico and Colorado, the Southern Ute Tribe, the Ute Mountain Ute Tribe. and the Jicarilla Apache Nation have signed a memorandum of understanding to establish the SJRRJP. At the conclusion of the SJRRJP seven-year study, recommendations were developed regarding flows and habitats required for recovery of the fish. I I I 22 001513