A biological opinion issued by the us fish and wildlife service in 2001 estimates that bringing the endangered rio grande silvery minnow (the minnow) back from the brink of extinction requires at least 50 cubic feet per second (cfs) of year-round streamflow at the san acacia gauge near socorro, new mexico (map. Communities, soils, water quality conditions, etc, resemble those known to be used by the have an adverse effect on the species or its critical habitat any action that would result in take of rio grande is no effect minnow e kilometer (157-mile) reach of the middle not located within or adjacent to. The u s usfws has designated 157 river miles as critical habitat for the endangered rio grande silvery minnow along the last remaining inhabited portion of the silvery minnow's range in new mexico. The rio grande supplies water for endangered biota and a burgeoning human population, but little is known about sources and cycling of nutrients through the food web of this dryland river ecosystem.
In the process of designating critical habitat, we determined that a river reach of the rio grande in big bend national park and the rio grande wild and scenic river to the terrell/val verde county line, tx, is essential to the conservation of the silvery minnow however, this area was not proposed for critical habitat designation, as explained. This article estimates economic impacts associated with one method for increasing instream flows to protect critical habitat re-quirements of the endangered rio grande silvery minnow. Middle rio grande restoration project, bernalillo and sandoval counties, new mexico prepared by 1d north ‘may affect but is not likely to adversely modify designated critical habitat of the rio grande silvery minnow and ‘may affect but is not likely to adversely affect’ the water quality 12 threatened and endangered. The texas rio grande watermaster program (tceq 1938) administered by the tceq (texas commission on environmental quality) regulates us water diversions along the rgb mainstem, water is allocated according to prior appropriation based on beneficial use and date of water right.
Additionally, it has been suggested that nursery habitat (ie, areas typified by shallow depths and minimal water velocities) can be constructed for rio grande silvery minnow in areas that are. Competition and predation by introduced non-native species, water quality degradation, and other factors may also have contributed to the decline (usfws 2010) bestgen, kr and platania, sp 1991 status and conservation of the rio grande silvery minnow, hybognathus amarus southwestern 1999 final designation of critical habitat. The 10-mile long rio puerco reach of the middle rio grande, located from the mouth of the rio puerco to the san acacia diversion dam, is included in the habitat designation for two federally-listed endangered species, the rio grande silvery minnow and the southwestern.
Much of the high quality brush habitat that still exists in the lower rio grande valley (lrgv) is in public ownership, but it is insufficient to sustain many of the region’s threatened plants, animals and communities. Quality of water essay examples 5 total results an analysis of the critical habitat for the rio grande silver minnow for the quality of water 486 words 1 page a description of the effects of industrial wastes intoxicating the water around the world 319 words 1 page. This publication, economic analysis of water conservation practices for agricultural producers in the walker river basin, was published by the university center for economic development in the department of resource economics at the university of nevada, reno.
California condor, rio grande silvery minnow and its designated critical habitat, and critical habitat for the southwestern willow flycatcher please contact the service if this project changes. Global range: historical range included the rio grande and pecos river systems, texas, new mexico, and mexico in the rio grande, this species occurred from española, new mexico, downstream to the gulf of mexico in the pecos river it occurred from the rio grande to santa rosa, new mexico it also occurred in the lower rio chama and the lower. The western silvery minnow (hybognathus argyritis) is a small cyprinid species native to large plains streams in northwestern north america it was first documented in canada in 1961 from the lower milk river, alberta (uamz 5320, university of alberta museum of zoology), and its presence has not been verified in any other canadian river systems. Upper rio grande water operations review feis a-1 an analysis of hydrogen sulfide generation at elephant butte reservoir, sierra county, new mexico proposed rule to list the rio grande silvery minnow as endangered, with critical habitat” volume 58, no 38 march 1.
Of critical habitat designations15 such litigation has been most controversial when focused on the issue of whether critical habitat designations require compliance with the national environmental policy act of 1969 16 (nepa) 17. The silvery minnow in its critical habitat under the esa, the other the esa action, our analysis resonates with issues raised by the rio grande, specifically water deliveries under the middle rio grande project and under the san juan-chama project, to require.
Although fws proposed a new critical habitat designation on june 6, 2002, see designation of critical habitat for the rio grande slivery minnow, 67 fed reg 39206 (june 6, 2002) (to be codified at 50 cfr pt 17), the secretary did not conduct an eis, instead, appealing that portion of the court's injunction to allow fws to reconsider. Final - february 2003 final economic analysis. Improve water operations in new mexico's middle rio grande valley' challenged to meet the water supply needs for two endangered species, the group attempted a preliminary analysis of alternative reservoir storage.