Tag: Nevada

Nevada, often referred to as the “Silver State,” is located in the western United States. Renowned for its vast deserts and striking mountain ranges, the state boasts a diverse landscape that includes the arid Mojave Desert in the south and the forested Sierra Nevada mountains in the west. The state is famously home to Las Vegas, a vibrant city known for its bustling casinos, entertainment venues, and nightlife. Beyond the glitz of Las Vegas, Nevada offers rich history in its ghost towns, a legacy of the 19th-century mining boom. The state also features significant natural attractions, such as Lake Tahoe and Great Basin National Park, offering a wide range of outdoor activities. Nevada’s economy is driven by tourism, mining, and, increasingly, technology, making it a dynamic state with a blend of natural beauty and modern attractions.

Cochan – Colorado River Steamship

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The Cochan was the last stern-wheel steamboat operated by the Colorado Steam Navigation Company (CSNC) on the Colorado River, running from late 1899/1900 until about 1909–1910. Named for the Quechan (Yuma) people, it marked the end of commercial steam navigation on the lower Colorado after nearly six decades of steamboat activity that began in 1852.

View showing steamboat Cochan on the Colorado River near Yuma, Arizona in 1900 - U.S. National Archives and Records Administration
View showing steamboat Cochan on the Colorado River near Yuma, Arizona in 1900 – U.S. National Archives and Records Administration

Origins and Construction

By 1899, CSNC owners Isaac Polhamus and Jack Mellon faced aging vessels and renewed competition from newer boats (including the St. Vallier). Their remaining steamers, the Mohave II (about 23 years old) and the Gila (launched 1873 and already more than 25 years in service), had worn hulls requiring heavy maintenance. The Gila was selected because it retained better engines.

In late 1899, the Gila’s machinery was refurbished and installed in a rebuilt (or heavily reconstructed) hull at the shipyard in Yuma, Arizona, at a cost of roughly $25,000 (some accounts cite about $27,000). The vessel was launched on November 8, 1899, and renamed Cochan. It was two tons lighter and 14 feet shorter than the Gila.

Key specifications:

  • Displacement: 234 tons
  • Length: 135 feet
  • Beam: 31 feet
  • Draft: 11 inches unloaded; less than 2 feet (about 22 inches) when loaded with cargo
  • Cargo capacity: up to 125 tons of freight
  • Propulsion: stern paddlewheel driven by the refurbished steam engines from the Gila

The Cochan was a classic Western-river sternwheeler optimized for the Colorado’s difficult conditions—shifting sandbars, snags, swift currents, seasonal low water, and abrasive sand. Design priorities emphasized extreme shallow draft, a relatively flat or lightly built wooden hull reinforced against grounding and impacts, and reliable (rather than high-speed) power for towing barges. Sternwheel configuration aided maneuverability in confined or shallow channels and allowed techniques such as using the wheel to help dig through bars. These principles continued the adaptations that Colorado River boats had developed since the 1850s, prioritizing flotation and cargo-carrying ability in minimal water over ocean-style seaworthiness or deep-draft efficiency.

In 1900 the company also built a new barge, the Silas J. Lewis (about 150 feet long and 32 feet in beam), for the Cochan to tow, while scrapping older barges.

Operations and Role in Trade

The Cochan entered service in January 1900, carrying freight to mining districts such as the Quartette and Searchlight mines in Nevada and competing directly with the St. Vallier (and later the Searchlight). It operated primarily on the lower Colorado between Yuma, Arizona, and points upstream toward Needles, California, and mining areas, supporting the final phase of the region’s mining boom with supplies, equipment, ore, and passengers.

Steamboats like the Cochan remained important for expanding and sustaining trade along the Colorado long after the Southern Pacific Railroad reached Yuma in 1877. They provided the most economical means of moving bulk goods across the desert Southwest until rail lines fully displaced them. The Cochan and its contemporaries hauled freight for mines, helped supply irrigation and reclamation projects (including work related to the Imperial Valley and the temporary diversion that formed the Salton Sea), and maintained local commerce on stretches of the river still poorly served by rail. By the early 1900s, however, additional rail bridges (including the Arizona and California Railroad at Parker in 1905) and the completion of Laguna Dam in 1909 (about 14 miles above Yuma) progressively eliminated upstream navigation. By the end of 1905 most boats, including the Cochan, had been withdrawn to the Yuma area.

Steamer "Cochan" on Colorado River at Needles. The Otis Marston Colorado River Collection. The Huntington Library, San Marino, California.
Steamer “Cochan” on Colorado River at Needles. The Otis Marston Colorado River Collection The Huntington Library, San Marino, California.

End of Service

Just before Laguna Dam closed the river to steam navigation, the CSNC sold its remaining boats, including the Cochan, to the U.S. Reclamation Service in 1909. The Service had no need for the vessel, and it was dismantled in the spring of 1910 at Yuma. This marked the practical end of the steamboat era on the lower Colorado, which had facilitated thousands of tons of annual commerce since the 1850s.

Historical Significance

The Cochan embodied the final refinement of shallow-draft sternwheeler design for one of North America’s most challenging rivers. By recycling proven engines into a lighter, shorter hull with exceptional draft performance, its builders extended the economic life of river transport during a period of intensifying competition from railroads and dams. It supported late mining activity, early 20th-century reclamation efforts, and residual trade until infrastructure changes rendered steamboats obsolete. As the last major sternwheeler of the Colorado Steam Navigation Company, the Cochan closes a chapter in the transportation history of the American Southwest that had opened the desert interior to sustained commercial development.

Hoover Dam

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Hoover Damn Bypass seen from the top with Hoover Damn. Photo by James L Rathbun
Hoover Damn Bypass seen from the top with Hoover Damn. Photo by James L Rathbun

Hoover Dam (originally authorized as Boulder Dam or the Boulder Canyon Project) is a concrete arch-gravity dam in Black Canyon on the Colorado River, on the Arizona–Nevada border about 30 miles southeast of Las Vegas. Built between 1931 and 1936 during the Great Depression, it stands 726.4 feet high, stretches 1,244 feet along its crest, is 660 feet thick at the base and 45 feet at the crest, and contains about 3.25 million cubic yards of concrete (roughly 4.4 million cubic yards including appurtenant works). It creates Lake Mead, one of the largest reservoirs in the United States by capacity (historically around 28–32 million acre-feet depending on sedimentation surveys and measurement basis).

Why It Was Built

Hoover Dam takes shape from the concrete columns in which it was poured (shot from cableway control tower downstream on Nevada rim, so looking upstream)
Hoover Dam takes shape from the concrete columns in which it was poured (shot from cableway control tower downstream on Nevada rim, so looking upstream)

In the early 20th century, the Colorado River was both a vital resource and a destructive force for the arid Southwest. Seasonal floods devastated farmland (most dramatically in 1905–1907, when the river broke through irrigation canals and created the Salton Sea in California’s Imperial Valley), while dry periods left water supplies unreliable. Growing cities such as Los Angeles needed dependable municipal water, and the region sought hydroelectric power to support development.

The U.S. Bureau of Reclamation (then the Reclamation Service) saw a large multipurpose dam as the solution: flood control, irrigation water storage and delivery (including via the later All-American Canal to the Imperial and Coachella Valleys), municipal supply, river regulation, and hydropower. Power sales were intended to make the project self-supporting by repaying construction costs. Early advocates included Arthur Powell Davis of the Reclamation Service. Herbert Hoover, as Secretary of Commerce, strongly supported the project and helped resolve interstate water disputes.

A major political obstacle was allocating the river’s water among the seven basin states (Wyoming, Colorado, Utah, New Mexico, Arizona, Nevada, and California). Upper Basin states feared Lower Basin (especially California) development would claim most of the water under prior-appropriation rules. In 1922, Hoover chaired negotiations that produced the Colorado River Compact. It divided the basin at Lee Ferry, Arizona, allocating 7.5 million acre-feet annually to each basin (with the Lower Basin allowed an additional 1 million acre-feet under certain conditions) and requiring the Upper Basin not to deplete flows at Lee Ferry below 75 million acre-feet over any 10-year period. Arizona initially refused to ratify; the Compact became effective after six states approved it.

Photograph of the Hoover Dam (formerly Boulder Dam) from Across the Colorado River; From the series Ansel Adams Photographs of National Parks and Monuments, compiled 1941 - 1942, documenting the period ca. 1933 - 1942
Photograph of the Hoover Dam (formerly Boulder Dam) from Across the Colorado River; From the series Ansel Adams Photographs of National Parks and Monuments, compiled 1941 – 1942, documenting the period ca. 1933 – 1942

Congress authorized the project via the Boulder Canyon Project Act, signed by President Calvin Coolidge on December 21, 1928. The Act ratified the Compact (with California limited to 4.4 million acre-feet of the Lower Basin share), authorized the dam and related works (including the All-American Canal), and apportioned Lower Basin water roughly as California 4.4 million acre-feet, Arizona 2.8 million, and Nevada 0.3 million. President Hoover proclaimed the Compact effective in 1929. A later 1944 treaty allocated 1.5 million acre-feet annually to Mexico.

How the Site Was Chosen

Surveys of potential dam sites along the lower Colorado began in the early 1900s. The 1922 Fall-Davis Report recommended a high dam “at or near Boulder Canyon.” Boulder Canyon sites offered strong granite foundations but presented problems: one was crossed by a geologic fault; others were too narrow for construction camps or spillways; accessibility was poorer; and depth to bedrock was greater in places.

Further investigations (including the Weymouth Report) compared Boulder and nearby Black Canyon (about 20 miles downstream). Black Canyon was selected primarily for practical advantages: greater accessibility (a railroad spur could more easily connect from Las Vegas), shallower depth to solid bedrock in key locations, a narrower gorge with steeper walls, lower construction cost for a given height, and somewhat greater reservoir capacity for the same dam height. Geologic conditions were judged adequate (though Boulder’s granite was sometimes rated superior for load-bearing). The project retained the “Boulder Canyon” name even after the site shift. An independent Colorado River Board later confirmed the upper Black Canyon site.

The design chosen was a massive concrete arch-gravity dam (convex upstream face), developed under Bureau engineer John L. Savage and others. It transfers water pressure into the canyon walls while relying on its own weight for stability—an ultra-conservative approach after the 1928 St. Francis Dam failure raised safety concerns.

Construction

Six Companies, Inc. (a joint venture of major contractors including Utah Construction, Bechtel, Kaiser, Morrison-Knudsen, and others) won the contract in March 1931 with a bid of about $48.9 million—the largest U.S. government construction contract to that point. Work began in the spring of 1931 under Bureau construction engineer Walker Young and Six Companies superintendent Frank Crowe.

Key challenges included extreme desert heat, isolation, and the need to divert the entire river. Workers blasted four massive diversion tunnels (two on each side of the river, roughly 56 feet in diameter and totaling several miles in length) through the canyon walls. The river was diverted in November 1932. Cofferdams protected the site; the riverbed was excavated to solid rock; and canyon walls were scaled of loose rock. Concrete placement began June 6, 1933, and the last dam concrete was poured May 29, 1935. Cooling pipes embedded in the concrete controlled the heat of hydration so the massive structure would not crack. The dam began impounding water in February 1935, forming Lake Mead. Power generation started in late 1936. The project finished more than two years ahead of the seven-year contract schedule and was dedicated by President Franklin D. Roosevelt on September 30, 1935.

Roughly 21,000 people worked on the project at various times (peak employment over 5,000). Conditions were harsh; official figures record around 96–112 worker deaths from construction accidents (the exact total varies by counting method and whether indirect causes are included). Boulder City was built as a planned community for workers and their families. The dam was initially called Hoover Dam by the Hoover administration, renamed Boulder Dam under Roosevelt, and officially restored as Hoover Dam by Congress in 1947.

The Hoover Damn Bypass Bridge viewed from the Colorado River - Photo by James L Rathbun
The Hoover Damn Bypass Bridge viewed from the Colorado River – Photo by James L Rathbun

Hydropower revenues repaid the federal construction costs decades later. The powerplant (nameplate capacity roughly 2,080 MW after later uprates, with 17 main turbines) has historically supplied electricity to utilities in Arizona, Nevada, and California.

Current Struggles with Low Water

Lake Mead and the broader Colorado River system have been under severe stress from a multi-decade megadrought (intensified by climate change, higher temperatures, and increased evaporation), combined with chronic overuse relative to long-term average flows. The original Compact allocations assumed higher average river flows (around 16–17+ million acre-feet) than the observed long-term average (closer to 14–15 million acre-feet, and significantly lower in recent decades).

As of late August 2026, Lake Mead stood near record-low elevations for the modern period—approximately 1,038.87 feet, about 26% full (storage roughly 6.9 million acre-feet on a ~26 million acre-feet capacity basis used in some daily reporting). This is well below the full-pool elevation of about 1,220 feet and marks new lows relative to recent historical records (surpassing previous lows from 2022 in some metrics). Levels have continued a multi-year decline, with further drops expected until the next major snowmelt runoff.

Low water reduces hydropower generation because lower “head” (water pressure/height above the turbines) decreases output. Capacity falls sharply at lower elevations; generation has already been substantially reduced from historical averages, with further declines projected. Minimum power pool is around 950 feet (with some older turbines limited higher); dead pool (where water can no longer pass the dam by gravity) is about 895 feet. The reservoir remains above these critical thresholds but with a narrowing buffer.

Shortage declarations under existing guidelines have already triggered cuts in Lower Basin deliveries. Federal operating guidelines for 2027–2028 and the post-2026 framework emphasize protecting critical elevations at both Lake Mead and upstream Lake Powell (itself also near or at record lows). Measures include reduced releases from Powell to protect its infrastructure and power generation, mandatory and voluntary reductions in Lower Basin consumptive use (on the order of 1.25 million acre-feet annually plus additional conservation in early years of the new guidelines), and efforts to balance the system. Arizona faces particularly large percentage cuts under priority-based shortage sharing. Power production at Hoover is expected to remain constrained, raising costs for replacement energy and affecting ratepayers.

These challenges highlight the tension between the river’s engineered development (which enabled vast agricultural and urban growth in the Southwest) and the physical limits of a variable, arid basin under climate pressure. Ongoing negotiations among the basin states, tribes, Mexico, and the federal government focus on reducing overall use to match available supply while protecting critical infrastructure and ecosystems.

Hoover Dam remains an engineering landmark, a National Historic Landmark, and a major tourist destination, while continuing to serve its original purposes of flood control, water storage, and power generation—albeit under increasingly constrained hydrologic conditions.

Arthur Powell Davis

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Arthur Powell Davis (February 9, 1861 – August 7, 1933)
Arthur Powell Davis (February 9, 1861 – August 7, 1933)

Arthur Powell Davis (February 9, 1861 – August 7, 1933) was an American civil engineer, hydrographer, topographer, and geographer who played a pivotal role in the early 20th-century development of water resources in the American West. As Director of the U.S. Reclamation Service (predecessor to the Bureau of Reclamation) from 1914 to 1923, he was a leading architect of comprehensive federal plans to control and develop the Colorado River. He is widely regarded as a key conceptual founder of the Boulder Canyon Project (which produced Hoover Dam) and broader multipurpose river-basin development.

Early Life and Education

Davis was born on a farm near Decatur, Illinois, the nephew of the famed explorer and geologist John Wesley Powell (leader of the 1869 Colorado River expedition through the Grand Canyon). His family connections and early exposure to the West shaped his career. He attended local schools and Kansas State Normal School before earning a Bachelor of Science degree in civil engineering from Columbian University (now George Washington University) in Washington, D.C., in 1888.

He married Elizabeth (Preston/Brown) Davis in 1888; they had several daughters. He co-founded the National Geographic Society in 1888 and later held leadership roles in engineering societies. He was elected to the American Academy of Arts and Sciences (1921) and the American Philosophical Society (1927).

Early Career with the U.S. Geological Survey

Through his uncle’s influence, Davis joined the U.S. Geological Survey (USGS) as an assistant topographer around 1882–1884. He worked extensively in the Rocky Mountain region and the Southwest (New Mexico, Arizona, and California), gaining firsthand knowledge of arid lands and the Colorado River Basin. He advanced to topographer and, by 1895, to hydrographer in charge of government stream measurements.

His early international work included hydrographic examinations of potential Nicaragua and Panama Canal routes (late 1890s–early 1900s). He later consulted on irrigation and flood control in Puerto Rico, China, Turkestan (under both Tsarist and Soviet governments), and other regions, and contributed to Panama Canal studies.

Leadership in the Reclamation Service

Davis joined the newly created Reclamation Service (established under the 1902 Reclamation Act) early in its history. He rose to Chief Engineer around 1906–1908 and was appointed Director on December 10, 1914, succeeding Frederick Haynes Newell. He held the post until the agency’s name changed to the Bureau of Reclamation on June 18, 1923; he retired the next day.

Under his leadership the Service built major irrigation and storage works, including the Roosevelt Dam (Salt River), Shoshone and Arrowrock dams (each the world’s tallest at the time of completion), Elephant Butte Dam (Rio Grande), the Gunnison Tunnel, and the Strawberry Tunnel. He was among the first to strongly advocate multipurpose dams in which hydroelectric power generation would help amortize overall project costs—a principle that became central to later federal water development.

Role in Controlling and Developing the Colorado River

Davis’s most enduring contribution was his long-term vision for the Colorado River. Influenced by his uncle’s explorations and his own surveys, he recognized the river’s interstate and international character (flowing through seven U.S. states and into Mexico) and argued that only the federal government could coordinate its development at the necessary scale.

As early as 1902 he publicly called for the “gradual comprehensive development of the Colorado River by a series of large storage reservoirs,” with a high dam on the lower river as the keystone. He promoted basin-wide planning for flood control, irrigation storage, domestic water supply, and power generation rather than fragmented local projects.

In 1922, during his directorship, the Reclamation Service produced the influential report Problems of Imperial Valley and Vicinity (Senate Document 142, 67th Congress), commonly known as the Fall-Davis Report (after Interior Secretary Albert B. Fall and Davis). It examined reservoir sites, justified a high dam in the Boulder Canyon area, analyzed water supply and needs, and provided foundational data used by the Colorado River Compact Commission. The report and Davis’s advocacy helped frame the river’s problems as national in scope and laid groundwork for the Boulder Canyon Project Act and construction of Hoover (originally Boulder) Dam. Contemporaries, including engineers involved in the project, later called him the “father of the Boulder Canyon Project.”

Davis opposed purely local or piecemeal schemes (such as an early standalone All-American Canal proposal) when they conflicted with a coordinated multipurpose federal plan. His emphasis on power revenues to support large storage dams helped make ambitious Colorado River projects financially and politically viable. Shortly before his death he was appointed consulting engineer on the Boulder Dam project. Davis Dam (completed later on the lower Colorado, downstream from Hoover Dam) was named in his honor.

Later Years and Legacy

After leaving the Reclamation Service, Davis served as chief engineer and general manager of the East Bay Municipal Utility District in the Oakland, California, area (roughly 1923–1930). He also worked as a consulting engineer on irrigation projects in the Soviet Union (Turkestan and Transcaucasia) in the early 1930s.

He died in Oakland on August 7, 1933, at age 72 and was buried in Rock Creek Cemetery in Washington, D.C., alongside his wife.

Davis combined technical expertise, bureaucratic skill, and a progressive-era faith in expert-led federal action and efficiency. While he did not live to see Hoover Dam completed, his early vision, surveys, advocacy for multipurpose development, and the Fall-Davis Report were instrumental in transforming the Colorado River from an uncontrolled, flood-prone waterway into a managed system of storage, power, and irrigation infrastructure that shaped the modern American Southwest.

Raccoon (Procyon lotor)

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Raccoon (Procyon lotor)
Raccoon (Procyon lotor)

The raccoon (also spelled racoon), scientifically known as Procyon lotor, is a medium-sized nocturnal mammal native to North America and commonly called the common raccoon, North American raccoon, or northern raccoon. It is easily recognized by its distinctive black facial “mask,” pointed muzzle, grayish-brown dense fur, and bushy tail marked with several dark rings. Highly adaptable and intelligent, raccoons have extremely dexterous front paws that allow them to manipulate objects and forage effectively; their species name lotor (Latin for “washer”) refers to their habit of dipping food in water. Other names include the colloquial “coon,” the popular nickname “trash panda” (for their urban scavenging), Spanish mapache, French raton laveur (“washing rat”), and German Waschbär (“wash-bear”). Raccoons are omnivores found in forests, wetlands, and cities across much of the continent, where their clever, opportunistic nature has made them both familiar and sometimes notorious neighbors to humans.

Description (Physical Characteristics)

The raccoon is a medium-sized, stocky mammal with a bear-like body, short legs, and a plantigrade (flat-footed) gait. Adults typically measure 40–70 cm (16–28 in) in head-body length, with a bushy tail of 20–40 cm (usually around 25 cm / 10 in). Shoulder height is 23–30 cm (9–12 in). Weight varies widely by region, sex, season, and food availability—generally 5–12 kg (11–26 lb), though extremes range from about 2 kg to over 26 kg (4–57 lb). Northern populations and males tend to be larger; some northern animals can store up to 50% body fat for winter.

Fur is dense and grayish to reddish-brown or buff, with a lighter underside; the dense underfur provides insulation. The most distinctive features are the black “bandit” facial mask (framed by white fur around the eyes and snout), rounded ears often edged in white, and a ringed tail with 4–10 black bands (tip usually dark). Front paws are highly dexterous, resembling slender human hands with five fingers and sensitive vibrissae (whiskers) on the digits; hind feet also have five toes. Raccoons are excellent climbers and capable swimmers.

Sexual dimorphism is moderate: males are typically 10–30% heavier than females.

Scientific Classification

KingdomAnimalia
Phylum Chordata
ClassMammalia
OrderCarnivora
FamilyProcyonidae
GenusProcyon
SpeciesProcyon lotor

Common names include northern raccoon, common raccoon, and coon. It is the largest and most widespread member of the procyonid family (which also includes coatis, kinkajous, and ringtails).

Behavior

Raccoons are primarily nocturnal, with peak activity often before midnight, though they may forage diurnally when food is abundant or conditions favor it (e.g., low tide). They are intelligent and have excellent problem-solving abilities and long-term memory (solving tasks and retaining solutions for at least three years in studies). Their sensitive forepaws allow precise manipulation of objects, unlocking containers, and foraging by touch.

They are largely solitary outside the breeding season and mother-young groups. Females raise litters alone; several individuals may share dens in cold weather or congregate at rich food sources. Home ranges vary widely (often 1–3 km in diameter, larger for males or in resource-poor areas). They den in tree cavities, hollow logs, burrows of other animals, rock crevices, brush piles, abandoned buildings, attics, culverts, or storm drains. In northern regions they enter periods of winter dormancy (not true hibernation), living off fat reserves and potentially losing significant body weight, while remaining metabolically active.

They are agile climbers that escape danger by ascending trees and are known for adaptability, including urban “nuisance” behaviors such as raiding trash. When threatened they can be aggressive.

Habitat

Preferred habitats are deciduous and mixed forests, especially near water (streams, rivers, lakes, wetlands, marshes, swamps, and bottomland hardwoods). They thrive in areas offering den sites (tree cavities preferred for rearing young), food diversity, and water for drinking and foraging.

Due to high adaptability they occupy a wide range of environments: coastal marshes, mangroves, farmlands, prairies (favoring woodlots and wetlands), mountainous areas (generally below ~2,000 m), and especially urban/suburban settings where they use human structures and garbage. They avoid extensive open fields or pure pine forests when better options exist but can persist in diverse landscapes as long as water and shelter are available.

Range (Geographic Distribution)

Native range spans much of North and Central America: from southern Canada (Nova Scotia to British Columbia) across nearly the entire contiguous United States (absent or sparse in parts of the northern Rocky Mountains and Great Basin), through Mexico, and south to Panama.

They have been introduced outside this range, notably to parts of Europe (Germany, France, and others), the Caucasus, Japan, and some Caribbean islands (some of which host populations sometimes treated historically as distinct taxa). Multiple subspecies exist (around 20–22 recognized), varying mainly in size and coat details; the eastern raccoon (P. l. lotor) and Upper Mississippi Valley raccoon (P. l. hirtus) are among the most widespread.

Food Sources (Diet)

Raccoons are opportunistic omnivores—among the most flexible mammalian diets. Rough averages: ~40% invertebrates, ~33% plant material, ~27% vertebrates, with strong seasonal and local variation.

  • Plant foods: Fruits (berries, grapes, cherries, apples, persimmons, etc.), nuts and acorns (especially important in fall/winter for fat storage), seeds, grains (notably corn), and other vegetation.
  • Animal foods: Crayfish and other aquatic invertebrates, insects, worms, mollusks, frogs, fish, bird eggs, small mammals, birds, carrion, and occasionally reptiles.
  • Human-associated: Garbage, pet food, crops, and garden produce are heavily exploited in urban and rural areas.

They forage by touch, often near water, and may dunk food (the species name lotor means “washer”), though this is more tactile exploration than true washing. Diet shifts with season: more animal matter in spring, soft mast (fruits) in summer, hard mast and high-calorie items in fall.

Additional Notes
Lifespan in the wild is typically short (often 2–3 years on average) due to predation, vehicles, hunting/trapping, and disease; captive individuals can live 20+ years. Primary predators include coyotes, bobcats, large owls, and alligators (in the south). Raccoons play ecological roles as seed dispersers and mesopredators and are highly successful due to intelligence and behavioral flexibility.

This report synthesizes established biological data on Procyon lotor. Populations are generally secure (IUCN Least Concern) across most of the native range owing to adaptability.

Potosi, Nevada – Clark County Ghost Town

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Potosi (also known as Potosi Camp or Crystal City in the 1870s) is a historic mining ghost town and mining district in Clark County, southern Nevada, located in the Spring Mountains approximately 30–35 miles southwest of Las Vegas. The site, at an elevation of about 5,705 feet, centers on Potosi Mountain (around 8,504 feet) and Potosi Spring. It is significant as the location of Nevada’s first lode mine (the Potosi Mine), with operations dating to the mid-19th century. The Potosi Mining District is listed on the National Register of Historic Places.

Potosi mine, south center of sec. 12, T. 23 S., R. 57 E., the mine workings explore a zone at the base of the Yellowpine limestone. Clark County, Nevada. Circa 1921. Plate 33-B in U.S. Geological Survey. Professional paper 162. 1931.
Potosi mine, south center of sec. 12, T. 23 S., R. 57 E., the mine workings explore a zone at the base of the Yellowpine limestone. Clark County, Nevada. Circa 1921. Plate 33-B in U.S. Geological Survey. Professional paper 162. 1931.

The name “Potosi” derives from the famous silver-mining mountain in Bolivia (Cerro Potosí), passed indirectly through Potosi, Wisconsin, the hometown of an early mine manager. The area’s history spans possible pre-contact Native American use, Spanish exploration theories, Mormon settlement efforts, multiple mining booms and busts, and contributions to national needs during World War I. Today, it is largely abandoned but retains interpretive value and attracts hikers and history enthusiasts.

Early History and Pre-Mormon Activity

Indigenous peoples, including the Chemehuevi, had connections to the area. A giant cave on Potosi Mountain was reportedly used for vision quests by Chemehuevi shamans in the mid-19th century. Paiute guides later directed settlers to mineral deposits.

Speculative accounts suggest Spanish missionaries or Mexican prospectors may have explored or worked silver mines in the region as early as the 1770s or 1830s, possibly linked to the Old Spanish Trail (blazed in 1829–1830). However, these lack strong documentation, and modern recorded history begins in the 1850s. Artifacts like old coins or religious items have been anecdotally reported but are not definitively tied to large-scale operations.

Carol Lombard was killed on a Douglas DC-3, Jan 16, 1942 on Mt Potosi
Carol Lombard was killed on a Douglas DC-3, Jan 16, 1942 on Mt Potosi

Mormon Era and the First Lode Mine (1850s)

The modern history of Potosi is tied to the Mormon (Latter-day Saints) mission at Las Vegas Springs, established in 1855 as part of efforts for economic self-sufficiency in what was then considered part of southern Utah (later New Mexico/Arizona Territory before becoming Nevada). Lead was critically needed for bullets and other uses.

In 1856, a Paiute guide informed Mormon settlers of a lead deposit on the western slope of the Spring Mountains. Nathaniel V. Jones, an experienced miner dispatched from Salt Lake City, inspected and developed the site, naming it Potosi. A small camp with log cabins was built in a ravine below the mine, near a spring. Ore was initially smelted locally with limited success due to fuel and water issues, then hauled to Las Vegas for processing in a smelter inside the stockade (considered the first smelter west of the Missouri River operating in Nevada).

About 9,000 pounds of lead were recovered, but high zinc content complicated smelting. Operations ceased in early 1857 (or late 1856 per some accounts) when Brigham Young recalled the colonists amid tensions with the U.S. government. Potosi became Nevada’s first abandoned mine and ghost town.

Later 19th-Century Revivals (1860s–1870s)

Mining resumed sporadically. In 1861, the Colorado Mining Company (California interests) reopened the mine for silver, building a smelter at Potosi Spring and a camp with rock cabins housing up to 100 miners. Activity lasted until around 1863.

In the 1870s, the Silver State Mining Company worked the mine (sometimes called the Comet) and established Crystal City at Potosi Spring with stone buildings. This phase lasted roughly three years. Prospectors continued small-scale work intermittently for decades.

20th-Century Zinc Boom and Industrial Operations (1900s–1920s)

The arrival of the San Pedro, Los Angeles and Salt Lake Railroad (later Union Pacific) in 1905 enabled economic shipping of complex ores. New assays revealed significant zinc alongside lead and silver, sparking renewed interest.

Operations expanded in the 1910s. The Empire Zinc Company (New Jersey, with Denver offices) took over around 1913, building a modern camp with uniform housing, an electrical plant, a calciner, and an aerial tramway (constructed 1913) to transport ore down the steep hillside. Ore was trucked to railheads like Arden. A Yellow Pine railroad spur aided logistics.

During World War I, Potosi was designated a priority defense project for zinc, lead, and silver production. The mine yielded substantially for the war effort. Population grew temporarily; local newspapers noted births in the camp in 1918. Post-armistice, operations scaled back. The Empire Zinc Company dismantled much of the camp by 1919.

Subsequent lessees, including A.J. and A.R. Robbins and the International Smelting Company (mid-1920s), extracted more zinc (e.g., 31,000 tons in 1925), but high costs led to final abandonment around 1928–1930. Total estimated production reached about $4.5 million in lead, silver, and zinc. Other minerals included gold, copper, and traces of others.

Significance and Legacy

  • Mining Milestone: Nevada’s first lode mine, predating major strikes like the Comstock Lode in importance for early regional development.
  • Mormon Influence: Exemplifies early LDS efforts in the American West for self-sufficiency and settlement.
  • Economic and Military Role: Contributed to national metal supplies, especially in wartime.
  • Cultural/Historic Sites: Nevada State Historical Markers (e.g., No. 115) commemorate the site. The Potosi Mining District is on the National Register of Historic Places. Ruins are minimal today, but the mine itself (multi-level) and tram remnants remain points of interest for explorers.

The site is near the Old Spanish Trail and accessible via dirt roads (high-clearance vehicles recommended). It offers hiking opportunities, including to Potosi Mountain summits and cliffs.

Conclusion

Potosi embodies the boom-and-bust cycle of Nevada mining towns—driven by mineral riches, technological advances (railroads, trams), and national demands, yet challenged by remoteness, ore complexities, and economics. From a short-lived Mormon outpost to a contributor in World War I, its legacy as Nevada’s pioneering lode mine endures in historical markers, archives, and the rugged landscape of the Spring Mountains. While retired and deserted, it remains a tangible link to the state’s frontier past.

Sources: Compiled from Nevada SHPO historical markers, Travel Nevada Magazine archives, and related historical accounts. For on-site visits, consult current land access and safety information, as old mines pose hazards.

Potosi is a designated at Nevada State Historic Marker no. 115.

Town Summary

NamePotosi
LocationClark County, Nevada
GNIS849366
Latitude, Longitude35.9708, -115.5408
Elevation5705
Population100

Potosi Trailmap

References