Boulder Basin

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Boulder Basin is the westernmost of the three basins occupied by the Lake Mead reservoir and lies within the boundaries of Clark County, Nevada and Mohave County, Arizona. It includes the area between Hoover Dam and the mouth of Boulder Canyon at Auxiliary Point. When the reservoir is full it reaches an elevation of 1,204 feet / 367 meters. It includes Las Vegas Bay, Swallow Bay, Callville Bay and Hamblin Bay. [1]

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Boulder Wash is an ephemeral stream or wash in Clark County, Nevada. Its mouth is at its confluence with the Boulder Wash Cove of Lake Mead at an elevation 1,276 feet / 389 meters at when Lake Mead is at its full level. Currently as the reservoir is at a much lower level its mouth is found at approximately 36°10′07″N114°33′07″W. Its source is at 36°13′36″N114°31′22″W at an elevation of 2,841 feet / 866 meters in the Black Mountains. It flows down a canyon into the upper Pinto Valley southwestward before turning southeastward to Boulder Wash Cove.

West End Wash is an ephemeral stream or wash in Clark County, Nevada. Its mouth is at its confluence with the Callville Wash of Lake Mead at an elevation 1,250 feet / 381 meters at when Lake Mead is at its full level. Currently as the reservoir is at a much lower level its mouth is found at approximately 36°08′24″N114°42′57″W. Its source is at 36°15′55″N114°43′58″W at 3,083 feet / 940 meters in the Gale Hills.

Gale Hills, formerly considered part of the Muddy Range (1879), and later the South Muddy Mountains (1980s), are a range of hills southwest of the Muddy Mountains and about three miles north of the Boulder Basin of Lake Mead, in Clark County, Nevada. It is bounded on the east by Callville Wash; on the south by the Black Mesa lava flows; on the northwest by the valley of Gypsum Wash. Its highpoint is at 36°15′32″N114°43′12″W which lies at 3,756 feet / 1,145 meters.

Gypsum Wash is an ephemeral stream or wash in Clark County, Nevada. Gypsum Wash was originally a tributary of Las Vegas Wash before the formation of Lake Mead which submerged their confluence under Las Vegas Bay. Due to the lowering of the reservoir over recent years Gypsum Wash is once again a tributary of Las Vegas Wash, now exposed at 36°07′04″N114°50′54″W at an elevation of 1085 feet. When Las Vegas Bay is at its full level, Gypsum Wash flows into Lower Gypsum Wash Cove at 36°07′43″N114°51′26″W at an elevation of 1,204 feet / 367 meters.

Boulder Wash Cove is a cove in Lake Mead, in Clark County, Nevada. Boulder Wash for which the cove is named has its mouth in the cove at an elevation of 1,204 / 367 meters when the reservoir is at its full level.

Auxiliary Point is a cape in the Lake Mead reservoir in Clark County, Nevada. Auxiliary Point marks the mouth of Boulder Canyon, a canyon on the Colorado River, above Hoover Dam, now flooded by Lake Mead.

Swallow Bay is a bay within Boulder Basin in Lake Mead in Clark County, Nevada.

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References

Coordinates: 36°05′00″N114°45′04″W / 36.08333°N 114.75111°W / 36.08333; -114.75111