Question: The Amargosa tryonia is located in an intermittent waterway how many miles long?

full_context: Document 1: Little Lost River: The Little Lost River is a river in the central part of the U.S. state of Idaho. The river is about 49 mi long and drains an arid farming valley, the Little Lost River Valley, bordered by the Lost River Range on the west and Lemhi Range on the east. Instead of emptying into a larger body of water, it disappears into the ground at the edge of the Snake River Plain, a phenomenon that gives it its name. The water feeds into the Snake River Aquifer, eventually reaching the Snake River through a series of springs farther west.
Document 2: Warm Springs Natural Area: The Warm Springs Natural Area, also known as the Warm Springs Ranch, is located near the Moapa Indian Reservation in Clark County, Nevada, at an elevation of 2123 ft . The 1179 acre area is owned by the Southern Nevada Water Authority (SNWA). The area is a natural oasis in the Mojave Desert. The oasis is fed by close to 24 natural warm springs and contains many naturally occurring California fan palms ("Washingtonia filifera"), creating an ecosystem normally limited to the "low" Colorado Desert and so unique to the "high" Mojave Desert. The springs are the headwaters for the Muddy River.
Document 3: Metagonimoides oregonensis: Metagonimoides oregonensis is a trematode, or fluke worm, in the family Heterophyidae. This North American parasite is found primarily in the intestines of raccoons ("Procyon lotor"), American minks ("Neovision vision"), frogs in the genus "Rana", and freshwater snails in the genus "Goniobasis". It was first described in 1931 by E. W. Price. The parasite has a large distribution, from Oregon to North Carolina. Adult flukes vary in host range and morphology dependent on the geographical location. This results in different life cycles, as well as intermediate hosts, across the United States. On the west coast, the intermediate host is freshwater snails ("Goniobasis"), while on the east coast the intermediate host is salamanders ("Desmognathus"). The parasites on the west coast are generally much larger than on the east coast. For example, the pharynx as well as the body of the parasite are distinctly larger in Oregon than in North Carolina. The reverse pattern is observed on the east coast for uterine eggs, which are larger on the west coast. In snails, there is also a higher rate of infection in female snails than in males. Research on the life history traits of the parasites have been performed with hamsters and frogs as model species.
Document 4: Tiarella scabricula: Tiarella scabricula is a species of sea snail, a marine gastropod mollusk in the family Mitridae, the miters or miter snails.
Document 5: Beowawe, Nevada: Beowawe ( ) is a small town, misnomered on the internet as a ghost town, in Eureka County in northeastern Nevada in the western United States. It is the site of a mining operation and a geothermal power plant, and has a public library. "Beowawe" is a Paiute Native American word meaning "gate", so named for the peculiar shape of the hills close to town which gives the effect of a gateway opening to the valley beyond. The town is located at an elevation of 4695 ft , and is situated on State Route 306 5 mi south of Interstate 80. The Humboldt River runs through northern Nevada near Beowawe. At approximately 300 mi long, it is the second longest river in the arid Great Basin of North America. It has no outlet to the ocean, but instead empties into the Humboldt Sink.
Document 6: Amargosa tryonia: The Amargosa tryonia, scientific name Tryonia variegata, is a species of small freshwater snail with a gill and an operculum, an aquatic gastropod mollusk in the family Hydrobiidae. This species is endemic to the United States. The common name refers to the Amargosa River.
Document 7: Saratoga Springs (Death Valley): Saratoga Springs is a desert oasis located in southern Death Valley National Park in California. The wetland lies at the southern tip of the Ibex Hills, on the floor of Death Valley and just northeast of the Amargosa River. Several springs overflow into pools totaling 6.6 acres (2.7 ha) in area, making the site the third largest marsh in the park. The pools provide habitat for several endemic species, including the Saratoga Springs pupfish. Other rare species present include the Amargosa tryonia snail, the Amargosa springsnail, the Saratoga Springs belostoma bug, the Amargosa naucorid bug, and the Death Valley June beetle. Plant life includes common reeds, bulrush and saltgrass.
Document 8: Black Canyon Wilderness (Nevada): The Black Canyon Wilderness in the state of Nevada is a 17220 acre wilderness area located in the Dry Lake Watershed along Dry Lake Valley at Black Canyon of the Colorado, west of the Great Basin Divide. It is part of the Lake Mead National Recreation Area. Immediately to the south is the El Dorado Wilderness, in the El Dorado Mountains. Together, the two wilderness areas protect 49170 acre .
Document 9: Amargosa River: The Amargosa River is an intermittent waterway, 185 miles (298 km) long, in southern Nevada and eastern California in the United States. It drains a high desert region, the Amargosa Valley in the Amargosa Desert northwest of Las Vegas, into the Mojave Desert, and finally into Death Valley where it disappears into the ground aquifer. Except for a small portion of its route in the Amargosa Canyon in California and a small portion at Beatty, Nevada, the river flows above ground only after a rare rainstorm washes the region. A 26-mile (42 km) stretch of the river between Shoshone and Dumont Dunes is protected as a National Wild and Scenic River. At the south end of Tecopa Valley the Amargosa River Natural Area protects the habitat.
Document 10: Diamondback tritonia: The diamondback tritonia, "Tritonia festiva", is a species of nudibranch, a marine gastropod mollusk in the family Tritoniidae. It is an opportunistic predator of other marine invertebrates.
Document 11: Lymnaeidae: Lymnaeidae, common name the pond snails, is a taxonomic family of small to large air-breathing freshwater snails, aquatic pulmonate gastropod mollusks, that belong to the clade Hygrophila.
Document 12: Beatty, Nevada: Beatty (pronounced BAY-dee) is an unincorporated town along the Amargosa River in Nye County in the U.S. state of Nevada. U.S. Route 95 runs through the town, which lies between Tonopah, about 90 mi to the north, and Las Vegas, about 120 mi to the southeast. State Route 374 connects Beatty to Death Valley National Park, about 8 mi to the west.
Document 13: Crassula aequilatera: Crassula aequilatera, known as the triangle shell, is a surf clam, a moderately large marine bivalve mollusc in the family Mactridae.
Document 14: Death Valley National Park: Death Valley National Park is a national park in the United States. Straddling the border of California and Nevada, located east of the Sierra Nevada, it occupies an interface zone between the arid Great Basin and Mojave deserts in the United States. The park protects the northwest corner of the Mojave Desert and contains a diverse desert environment of salt-flats, sand dunes, badlands, valleys, canyons, and mountains. It is the largest national park in the lower 48 states and has been declared an International Biosphere Reserve. Approximately 91% of the park is a designated wilderness area. It is the hottest, driest and lowest of the national parks in the United States. The second-lowest point in the Western Hemisphere is in Badwater Basin, which is 282 ft below sea level. The park is home to many species of plants and animals that have adapted to this harsh desert environment. Some examples include creosote bush, bighorn sheep, coyote, and the Death Valley pupfish, a survivor from much wetter times.
Document 15: Terebra tiarella: Terebra tiarella is a species of sea snail, a marine gastropod mollusk in the family Terebridae, the auger snails.
ground_truth: 185 miles