The Enduring Legacy of Hydraulic Mining in California

While the gold rush was an incredible boon for California, hydraulic mining’s environmental toll—eroded hillsides and choked rivers—remains a stark reminder of the cost of progress.

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“Earth provides enough to satisfy every man’s needs, but not every man’s greed.” — Mahatma Gandhi

“Greed is a bottomless pit which exhausts the person in an endless effort to satisfy the need without ever reaching satisfaction.” — Erich Fromm

It was the tail end of the 19th century, a time of gunslingers and gold-diggers, of pioneers venturing forth into the vast expanse of the American West. The year was 1853, and the place was California. From the bustling seaports of San Francisco to the rugged mining towns dotting the Sierra Nevada foothills, the Golden State was witnessing an unprecedented phenomenon. This was the era of the California Gold Rush, a frenzy of ambition, adventure, and avarice that transformed the state and the nation.

The Gold Rush began in 1848 when gold nuggets were discovered at Sutter’s Mill in Coloma, near Sacramento. Soon after, miners from around the world rushed to California, lured by the promise of riches. But as the easily accessible placer deposits in river beds were quickly exhausted, the miners were forced to develop new, more efficient methods of extraction to mine the deeper and harder-to-reach gold seams. Thus, hydraulic mining – a form of mining that utilized high-pressure water jets to wash away soil and rock, revealing the precious metal underneath – was born.

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Enter: The Innovators

Hydraulic mining in California is inextricably linked with two significant figures: Edward E. Matteson, an entrepreneurial miner, and Anthony Chabot, a young businessman turned water systems innovator. Matteson is credited as the originator of hydraulic mining in 1853, having invented the process out of necessity while trying to extract gold from the gravels of Nevada County, in a site later known as “Blue Tent.”

Matteson’s invention involved directing a powerful stream of water from a makeshift canvas hose onto a hillside, effectively washing away the dirt and gravel to expose the gold underneath. This crude but effective method marked a turning point in gold mining, facilitating the extraction of gold from areas previously deemed unprofitable or inaccessible.

University of California

However, it was Anthony Chabot who took Matteson’s idea and turned it into an industrial-scale operation. Chabot, known as the “Water King,” was a successful entrepreneur who had established multiple water systems in California. Intrigued by Matteson’s invention, he developed the hydraulic nozzle, or “monitor,” in 1855. With this high-pressure water cannon, miners could erode whole mountainsides in their search for gold, making hydraulic mining the most effective and popular method of gold extraction at that time.

The profits from hydraulic mining were enormous. As a result, the state economy boomed and many jobs were created. From 1860 to 1880, California’s mining operations yielded $170 million. San Francisco had more millionaires than New York or Boston. 

The Scourge of the Sierra

From the mid-1850s to the mid-1880s, hydraulic mining reigned supreme in California, especially in the counties of Nevada, Placer, and Yuba, where extensive networks of canals, reservoirs, and sluices were constructed to support the practice. Hydraulic mines became colossal operations, employing hundreds of workers and dislodging millions of tons of earth annually. But this progress came at a tremendous cost to the environment.

California State Library

The enormous water pressure used in hydraulic mining dislodged vast quantities of soil, rock, and debris, collectively referred to as “slickens.” These slickens were often laden with mercury, a neurotoxin used extensively in gold amalgamation processes. Water cannons, such as the one above, were used to wash away earth and mountains to access gold. In the early days of the gold rush, these cannons were small with canvas hoses, but more force was eventually needed. By the 1870s these cannons were anywhere from 13 to 18 feet long and could blast water 500 feet. The rivers of Northern California became choked with these toxic tailings, devastating local ecosystems.

 “I am at a loss to illustrate the tremendous force with which the water is projected from the pipes. The miners assert that they can throw a stream four hundred feet into the air. … Those streams directed upon an ordinary wooden building would speedily unroof and demolish it,” wrote a reporter for the San Francisco Daily Alta.

One notable example is the Yuba River. In its heyday, hydraulic mining along the Yuba generated approximately 685 million cubic yards of debris, enough to bury Manhattan under ten feet of waste. Much of this sediment still remains, hindering river navigation and threatening local wildlife to this day. The Feather and American rivers also bear the scars of this destructive practice.

The Aftermath and Lingering Effects

By the 1870s, the catastrophic consequences of hydraulic mining were impossible to ignore. Downstream communities, most notably Marysville and Sacramento, suffered frequent and devastating floods exacerbated by mining debris. Agricultural lands were rendered useless by layers of sterile slickens, and fish populations in rivers dwindled alarmingly. The long-term health impacts of widespread mercury contamination are still being understood today.

The tension between the mining industry and the downstream farming communities ultimately culminated in the landmark case of Woodruff vs. North Bloomfield Gravel Mining Company in 1884. This case, presided over by Judge Lorenzo Sawyer, resulted in the famous “Sawyer Decision,” which effectively banned hydraulic mining due to its destructive environmental impact.

But while the Sawyer Decision marked the end of large-scale hydraulic mining, the scars left on the landscape of Northern California are far from healed. The evidence of this destruction is still visible in the stark, eroded hillsides and vast debris fields of Malakoff Diggins State Historic Park in Nevada County, once the site of California’s largest hydraulic mine.

Wikipedia

Modern research is shedding new light on the enduring impacts of hydraulic mining. A study published in 2022 by the University of California, Davis, found that the mercury used in 19th-century mining operations has had far-reaching effects on the state’s ecosystems. Scientists discovered elevated levels of the neurotoxin in local wildlife, suggesting that the legacy of the Gold Rush continues to impact California’s environment and its inhabitants.

The Sierra Fund has introduced the Resilient Sierra Initiative to address the long-term impacts of mining in the Sierra Nevada. Their research estimates that around 26 million cubic yards of sediment remain trapped in reservoirs, which could be released as the climate changes, potentially increasing the frequency and severity of downstream flooding.

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The advent of hydraulic mining during the California Gold Rush was undoubtedly a milestone in mining technology. It enabled the extraction of enormous amounts of gold and facilitated the growth and development of California. However, this innovation came with a heavy price. The ecological damage caused by hydraulic mining has left indelible marks on the landscape and continues to influence the state’s environment and communities.

Throughout history, humanity has often pursued wealth at the expense of the natural world. While some impacts are minor and fade over time, far too often, we cross a clear line without pausing to reflect on the damage we’re inflicting. Hydraulic mining in California serves as a powerful reminder: that line exists.

More information: KQED Documentary

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The Desert Tortoise: A Resilient Survivor of the Mojave

a close-up of a desert tortoise

The Mojave Desert, a harsh yet strikingly beautiful landscape that extends across four western U.S. states, is home to an equally fascinating and resilient creature: the desert tortoise (Gopherus agassizii). This fascinating reptile has evolved to survive in one of the world’s most inhospitable environments, but today, it faces numerous threats that are jeopardizing its existence.

The desert tortoise is a tortoise species in the family Testudinidae native to the Mojave and Sonoran deserts. They are specially adapted to withstand the extreme conditions of their desert habitat. Desert tortoises can tolerate water, salt, and energy imbalances on a daily basis, which increases their lifespans. On average, adult desert tortoises measure between 10 to 14 inches in shell length and weigh from 8 to 15 pounds. They have a high-domed shell, typically brownish in color, which serves as protection from predators. Their strong, stocky limbs are adapted for digging, an essential behavior for both foraging and creating burrows for shelter.

One of the desert tortoise’s most fascinating adaptations is its ability to store water. They have a large urinary bladder that can store over 40% of the tortoise’s body weight in water, urea, uric acid, and nitrogenous wastes. During the hot, dry summer months, this stored water can be reabsorbed back into the tortoise’s system, effectively allowing them to survive up to a year without access to fresh water.

a close-up of a desert tortoise

Desert tortoises are a testament to survival, with their lineage dating back 15 to 20 million years. They are primarily herbivorous, with a diet consisting of a variety of desert grasses, herbs, and wildflowers, along with the occasional consumption of insects and new growth of cacti.

Tortoises spend much of their lives in burrows, which provide refuge from extreme heat, cold, and predators. They are most active during the cooler hours of the day, and their activity pattern shifts with the changing seasons. Mating typically occurs in the spring and fall, with females laying a clutch of up to 15 eggs, though the survival rate of these hatchlings is low due to predation and harsh environmental conditions.

In 2011, on the basis of DNA, geographic, and behavioral differences between desert tortoises east and west of the Colorado River, it was decided that two species of desert tortoises exist: Agassiz’s desert tortoise (Gopherus agassizii) and Morafka’s desert tortoise (Gopherus morafkai). The new species name is in honor of the late Professor David Joseph Morafka of California State University, Dominguez Hills.

Desert tortoises spend 95% of their lives in their burrow. Seeing them on the landscape is a rare treat.

Estimates suggest that the population of desert tortoises has plummeted by as much as 90% since the mid-20th century. This decline is due to a variety of factors, including habitat loss from urban development and agriculture, road mortality, predation by dogs and other introduced species, and disease. In particular, upper respiratory tract disease (URTD), caused by the bacterium Mycoplasma agassizii, has been responsible for significant mortality.

Recognizing the threats faced by the desert tortoise, the U.S. Fish and Wildlife Service listed the species as threatened under the Endangered Species Act in 1990. This has led to numerous conservation efforts aimed at preserving the desert tortoise and its habitat.

Habitat conservation is a key focus, with several Desert Wildlife Management Areas established to protect crucial tortoise habitats. Efforts are also being made to reduce the impact of roads and highways on tortoise populations, such as the construction of underpasses and fencing along known tortoise crossing areas.

Education and public engagement are also critical components of conservation efforts. Initiatives are underway to educate the public about the desert tortoise and the importance of not removing them from their natural environment, a practice that can lead to population decline and the spread of disease.

Over the past few decades, desert tortoise populations have declined significantly, with estimates suggesting a staggering 90% reduction in some areas of the Mojave Desert. This decline has led to the desert tortoise being listed as “threatened” under the U.S. Endangered Species Act.

Desert tortoise facts
Lifespan: 30-50 years, but some can live to be over 80 years old
Weight: 8-15 pounds (3.5-7 kilograms)
Length: 9-15 inches (23-38 centimeters)
Range: Only found in the Mojave Desert in California, Nevada, Arizona, and Utah
Conservation status: Listed as threatened under the Endangered Species Act

Nature Conservancy

Numerous factors contribute to this decline, including habitat loss due to urbanization, off-road vehicle use, and livestock grazing. Additionally, the introduction of non-native predators, such as the common raven, has led to increased predation on juvenile tortoises.

Conservation organizations, government agencies, and local communities have come together to implement various strategies aimed at protecting and preserving the desert tortoise. These efforts include habitat restoration, fencing off sensitive areas, and developing educational programs to raise awareness about the species.

One such initiative is the “Adopt-a-Tortoise” program, which allows individuals and organizations to symbolically adopt a tortoise, with the proceeds going towards conservation efforts. Another important initiative is the “Head Start” program, which raises hatchlings in captivity until they reach a size less vulnerable to predators before releasing them into the wild.

Hidden in Plain Sight: The Fascinating World of California’s Bush Toyon

Toyon. (Photo: Erik Olsen)
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California is a land of endless natural wonder. From towering redwoods to sun-soaked deserts, the state offers an extraordinary tapestry of ecosystems teeming with life. Every day, we coexist with a fascinating array of plants and animals, many of which we might pass by without a second thought. But these creatures and plants play vital roles in the environment and tell remarkable stories of survival, adaptation, and beauty. Let’s pause for a moment to look closer at a few of them, starting with the elusive and captivating bush toyon—a plant that’s as iconic as it is intriguing.

With its vibrant red berries, glossy leaves, and resilience against harsh conditions, the toyon has captured the hearts of many Californians and can be found in yards, hillsides, and along roadsides throughout the state. Toyon (Heteromeles arbutifolia), is a versatile native shrub that has long played a prominent role in California’s natural and cultural history. Derived from the Greek words “heter” and “malus,” meaning “different” and “apple” respectively, the word Heteromeles refers to the resemblance of the toyon fruit to a small apple.

Toyon is a prominent component of the coastal sage scrub plant community and is a part of drought-adapted chaparral and mixed oak woodland habitats. This evergreen, drought-tolerant plant can be found from Baja California to Oregon, flourishing in a variety of habitats, such as coastal scrub, chaparral, and oak woodlands.

Toyon is a member of the rose family (Rosaceae) and can grow up to 8-15 feet tall, depending on its environment. The plant’s leaves are simple, alternate, and evergreen, with serrated margins and a leathery texture. Toyon is well-known for its clusters of bright red berries, which ripen in late fall and persist throughout the winter, providing a valuable food source for various bird species, such as cedar waxwings and robins. The berries also attract other wildlife, like coyotes and bears, and support a diverse ecosystem.

The plant’s cream-colored flowers bloom in early summer, attracting a variety of pollinators, including bees, butterflies, and hummingbirds. Toyon is a versatile plant that can adapt to different environmental conditions, such as sun or shade, dry or moist soils, and varying elevations. These adaptations make it an important component of California’s ecosystems and a valuable resource for both wildlife and humans.

Toyon along the California coast (Erik Olsen)

The indigenous people of California, such as the Chumash, Tongva, and Ohlone tribes, have long recognized the value of the toyon plant. The red berries, also known as “California holly,” are not only attractive to look at but also hold various practical uses.

Along these lines, while the origins of the name “Hollywood” remain uncertain, some suggest it may be tied to the toyon plant due to its bright red berries and festive appearance. Though there is no concrete evidence supporting this link, the plant’s prominence in the area makes the theory an intriguing possibility.

Toyon berries, although bitter and astringent when consumed raw, can be cooked, dried, or mashed to make a variety of foods, such as porridge, cider, and jelly. The berries were traditionally harvested and sun-dried, then ground into a flour-like consistency to make a nutritious, high-energy staple known as “pinole.” Later settlers added sugar to make custard and wine.

Toyon leaves were also of great importance. The Chumash, for example, used the leaves in a steam bath to alleviate rheumatic pain and respiratory issues. The leaves were also used as a poultice for sores, wounds, insect bites, and tea to treat stomach ailments.

The toyon’s hard, dense wood was used to make various tools, such as digging sticks, arrows, and ceremonial wands. The plant was also incorporated into many spiritual and cultural practices. For example, the Cahuilla tribe believed that the toyon was a symbol of rebirth and used its branches during mourning ceremonies.

Toyon in San Gabriel mountains

Toyon is such a common plant in California that its presence on the landscape can sometimes be easily ignored, and yet it is a remarkable plant that has played a significant role in California’s natural and cultural history. With its vibrant red berries, adaptability to various environmental conditions, and extensive traditional uses, it is a plant of remarkable beauty and utility. Today, the plant remains an important resource for wildlife, and its traditional uses continue to be recognized and celebrated by both indigenous people and modern Californians alike.

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Maybe You’ve heard of Josiah Whitney, Mt. Whitney’s Namesake

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Mount Whitney, the highest mountain in the contiguous United States, is one of the great peaks in California. A wildly popular destination for hikers, climbers, and backpackers, Whitney is located in Inyo National Forest and Sequoia National Park, California.

But how did Mt. Whitney get its name?

“The culminating peak of the Sierra” was identified in 1864 by a team from the California Geological Survey and named Mount Whitney in honor of the team’s leader, State Geologist Josiah Whitney. During that same expedition, survey member Clarence King made two attempts to reach the summit but did not succeed.

But Whitney wasn’t the mountain’s only name. When a group of fishermen made the first recorded ascent in 1873, they called it “Fisherman’s Peak,” a name that stuck locally for some time before Mount Whitney became the official designation. Long before that, the Indigenous Paiute people called the mountain Too-man-i-goo-yah, meaning “the very old man” or “the guardian spirit,” reflecting its towering presence and cultural significance.

Josiah Dwight Whitney was an American geologist and surveyor who made significant contributions to the field of geology in California. Born in Northampton, Massachusetts, in 1819, Whitney became interested in science at an early age and studied geology and mineralogy at Yale University. In 1860, he was appointed the State Geologist of California and founded the California Geological Survey, one of the oldest geological surveys in the nation.

Because gold fever still gripped much of the world at that time, most people assumed Whitney’s work would focus on locating valuable mineral resources, but Whitney instead pursued a broader scientific agenda—paleontology, historical geology, petrology, stratigraphy, and tectonics. He delivered meticulous studies of mineralogy and placed California’s geology within a global framework, prioritizing knowledge over immediate economic gain. The state, unimpressed by his academic approach, eventually cut his funding.

Whitney’s work in California was groundbreaking and helped establish the state as a hub of geological research. He conducted extensive surveys of the state’s natural resources, including minerals, soils, and water sources. He was also instrumental in mapping the state’s topography and geology, including the Sierra Nevada mountain range, where he made several important discoveries.

One of Whitney’s most significant contributions to California’s geology was the discovery of the existence of glacial action in the Sierra Nevada mountains. In 1864, he published a report describing the glacial formations he had observed in the mountains, including the formation of Yosemite Valley, which he attributed to the action of glaciers. This report was groundbreaking at the time and helped establish the study of glacial geology as a major area of research.

In addition to his work as a geologist, Whitney was also a skilled surveyor and cartographer. He was responsible for creating some of the first accurate maps of California, which were used by explorers, settlers, and scientists alike. His maps were highly detailed and included information about the state’s geology, topography, and natural resources.

Photo of the author at the top of Mount Whitney (Heidi Schumann for the New York Times)

In 1875, Whitney was elected to the National Academy of Sciences, and in 1880, he was awarded the Wollaston Medal by the Geological Society of London. Perhaps the most enduring recognition of his work is the fact that the highest peak in the contiguous United States is named after him. Mount Whitney, which stands at 14,505 feet, was named in his honor in 1896.

Whitney’s legacy lives on through the California Geological Survey, which he founded and served as its first director. The survey played an important role in the development of California, providing valuable information about the state’s natural resources and geology. It continues to operate today, providing information and expertise to policymakers, scientists, and the public.

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Serpentine is the Geological Gem of California

Serpentine (Wikipedia)
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Ask anyone what the California state rock is, and I doubt whether many people would answer correctly. Is it granite, the magnificent slabby stone that creates the sheer face of Half Dome and El Capitan in Yosemite? Is it obsidian, the glinty black stone so favored by some Native American tribes that they would walk hundreds of miles to collect it and bring home to make tools and weapons?

No, the state rock of California is neither of these. The state rock of California is serpentine.

Serpentine is more than just a pretty rock—it tells a fascinating geological story. Found in many parts of California, particularly in the Coast Ranges and the Sierra Nevada foothills, serpentine is a direct link to the deep, dynamic forces that shape the planet. Because it originates from the mantle, serpentine represents a rare glimpse into Earth’s interior, a reminder that what lies beneath us is always in motion. Beyond its aesthetic appeal, serpentine plays an important role in the environment. The soils that develop from serpentine rock are famously inhospitable to many plants due to their high levels of magnesium and low levels of essential nutrients like calcium. Yet, these tough conditions have led to the evolution of specialized plants—some of which are found nowhere else on Earth. California’s serpentine landscapes, with their sparse but highly adapted plant life, are home to unique ecological communities that have fascinated scientists for decades.

serpentine
A piece of polished serpentine reveals its beauty. (gemstones.com)

Serpentine is formed through the metamorphic process, where pre-existing rocks are transformed into new types under high temperatures, pressures, and chemical processes. Serpentine is primarily composed of hydrous magnesium silicate minerals, such as antigorite, chrysotile, and lizardite (yes, lizardite). Its distinct, vibrant green color and serpent-like appearance make it easily recognizable and intriguing to rock enthusiasts and casual observers alike. It is also widely collected and used as jewelry.

Serpentine is predominantly found in the coastal ranges of California, particularly in the Klamath Mountains and the Sierra Nevada foothills. It is also present in smaller quantities throughout the state. The prevalence of Serpentine in California is a result of the state’s complex geological history, which includes the subduction of oceanic plates beneath the continental North American Plate. This tectonic activity created ideal conditions for the formation of Serpentine. The recognition and study of serpentine in California contributed to the understanding of modern plate tectonic theory.

Serpentine (Wikipedia)

While not considered a precious gemstone, Serpentine holds significant value due to its unique aesthetic and limited distribution. It is often used as an ornamental stone for jewelry, sculptures, and architectural elements. In addition, Serpentine is historically known for its use in carving, particularly by Native American tribes in California. Serpentine’s low hardness and smooth texture make it ideal for intricate carvings and designs. In recent years, Serpentine has gained popularity among collectors and as a decorative addition to gardens and landscaping.

Serpentine was designated as California’s state rock in 1965, thanks to the efforts of state Assemblyman John Knox. This choice was influenced by the rock’s unique beauty, the significant role it played in California’s geological history, and its importance in the state’s mining industry during the late 19th and early 20th centuries. Asbestos, a fibrous mineral found in some forms of Serpentine, was once highly sought after for its heat-resistant properties. However, due to its association with health risks (asbestos is a known carcinogen that has long been associated with lung cancer), the use of asbestos has significantly declined, and current appreciation of Serpentine is largely focused on its aesthetic qualities.

Serpentinite outcrop on the coastal bluffs of the Presidio (National Park Service)

However, the state almost dropped serpentine from its state rock designation due to the high relative quantity of asbestos that serpentine contains. Asbestos occurs naturally in many minerals and in many places. And in fact some serpentine rocks do host chrysotile, a form of asbestos. But geologists say chrysotile is less harmful than some other forms of asbestos and would be a danger — like scores of other rocks — only if a person were to breathe its dust repeatedly.

Fascinatingly, serpentine landscapes host a rare and diverse range of plant species adapted to its high magnesium and low calcium environment, often thriving in soils toxic to other vegetation. This peculiar combination of geology and ecology makes California’s serpentine areas not just a subject of geological interest, but also a haven for biological research, offering insights into how life adapts to extreme conditions.

One well-studied group of organisms are plants that display serpentine endemism, meaning they are specially adapted to survive in these harsh soils. A key adaptation in plants involves tolerating high levels of toxic metals and nutrient deficiencies, which can drive speciation and lead to unique ecological communities. Studies on species like Arabidopsis arenosa have shown that genetic variation plays a crucial role in these adaptations, with gene flow and mutations contributing to their survival strategies in serpentine soils​.

Serpentine rock (Wikipedia)

Native Americans in California found a variety of practical and cultural uses for serpentine, a mineral abundant in the state and prized for its unique properties. It was particularly valued for its distinctive greenish color, soft texture, and ability to be easily shaped and polished. These qualities made it a favored material for crafting tools, ornaments, and ceremonial objects. Tribes used serpentine to create beads, pendants, and pipes, all of which could be intricately carved and polished to a smooth finish.

In addition to its practical uses, serpentine held significant spiritual and healing value for some Native American groups. The rock’s cool, smooth surface and striking color were believed to possess special properties, and it was often used in rituals or as a symbol of protection and healing. The association with spiritual energy likely contributed to its use in ceremonies or as amulets meant to bring good fortune or ward off harm.

Serpentine stones available for purchase on Ebay (Ebay)

Serpentine also played a role in trade among tribes. Crafted serpentine objects, such as polished ornaments and ceremonial items, were valuable trade goods. These items could be exchanged for other resources, reflecting the mineral’s cultural and economic importance. The widespread availability of serpentine in California’s unique geological landscape made it an accessible yet valuable material for Native American communities, shaping both their daily lives and spiritual practices.

Serpentine is not just a beautiful rock; it is a symbol of California’s rich geological and cultural heritage. By understanding the origins and significance of Serpentine, we can appreciate the complex processes that have shaped our planet and the remarkable diversity of its natural resources. Furthermore, the presence of Serpentine in California is an excellent example of the interconnectedness of geology, ecology, and human history, as the unique habitats it creates support rare plant species and have inspired the artistic endeavors of numerous cultures throughout time.

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The return of Lake Tulare – once the largest lake West of the Mississippi

The massive atmospheric snowstorms that pummeled California this year have been a boon to ski slopes throughout the Sierra Nevada mountains. But the rains have had an unusual result: The torrents of rain have drowned thousands of acres of farmland in California’s Central Valley and resuscitated a lake that vanished decades ago. Standing in an area that was dry as a bone just a year ago, right now, as far as the eye can see, water stretches to the horizon. It has covered roads, and crop fields, and submerged homes and buildings.

The lake is called Lake Tulare.

Lake Tulare, once the largest freshwater lake west of the Mississippi River, is a compelling example of the delicate balance between human activity and natural forces. Located east of Interstate 5 from Kettleman City, Lake Tulare was also the second-largest freshwater lake in the United States, based on surface area. At its peak, Lake Tulare covered an area of nearly 700 square miles and was a critical component of the region’s complex hydrological system.

The lake’s disappearance over a century ago can be traced back to multiple factors, including agricultural development, water diversion, and climate. Fed by the Kaweah, Tule, and Kern Rivers, the lake supported a vibrant ecosystem teeming with fish, waterfowl, and other wildlife. Native American tribes, including the Yokuts, relied on the lake’s abundant resources for sustenance and trade.

Lake Tulare began to shrink in the late 19th century as European settlers moved into the area and agriculture took hold. The burgeoning need for water to support the growing agricultural industry led to the construction of canals and dams, which diverted water away from the lake. As a result, the lake’s surface area shrank rapidly, and by the early 20th century, it had disappeared almost entirely.

Spanish captain Pedro Fages led the first excursions to the southern San Joaquin Valley in 1773 and wrote this account:

This plain will exceed one hundred and twenty leagues in length and in parts is twenty, fifteen and even less in width. It is all a labyrinth of lakes and tulares, and the river San Francisco, divided into several branches, winding in the middle of the plain, now enters and now flows out of the lakes, until very near to the place where it enters into the estuary of the river.

Pedro Fages
Fulvous whistling-duck

Today alfalfa is grown on the southern basin and there is invasive saltcedar, a common species that has also impacted regions of the Colorado River Delta. Animal life includes the Buena Vista Lake shrew (Sorex ornatus relictus), the southwestern pond turtle (Actinemys pallida), fulvous whistling-duck (Dendrocygna bicolor), and the California red-legged frog (Rana aurora draytonii). Other species native or present in the area are sandhill cranes and tricolored blackbird.

But what is the future of Lake Tulare?

Last summer, UCLA climate scientist Dan Swain published a paper that predicted more intense weather patterns on a gradually warming planet. He told CNN that the worst-case scenario of relentless atmospheric rivers could actually make Tulare Lake permanent again, turning it into a vast, inland sea.

We’ll have to wait and see.

And in the meantime, check ut this recent before and after satellite image of the central valley and Lake Tulare.

The Los Angeles Aqueduct Cascades is a Monument to Human Ingenuity and the Lifeblood of a Megacity

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Los Angeles is home to nearly four million people, but this bustling metropolis would not have been possible without a vital resource: water. While the city’s origins can be traced back to the humble Los Angeles River, it was the Los Angeles Aqueduct that allowed the city to grow exponentially. This article will delve into the history of the Los Angeles Aqueduct, the monumental cascades that make it an engineering marvel, and the key people involved in its conception and construction.

William Mulholland and Fred Eaton scout the Owens River as a potential source of water for Los Angeles

In the early 20th century, the population of Los Angeles was growing rapidly, and city leaders recognized that the existing water supply from the Los Angeles River would not be sufficient to support the city’s future growth. Thus, in 1905, the city embarked on a quest to secure a new water source to sustain its increasing population.

Engineer and visionary William Mulholland was tasked with finding a solution to the city’s water woes. He discovered the Owens River, located more than 200 miles away, which had an abundant supply of fresh water. In 1906, Los Angeles voters approved the bonds necessary to construct a massive aqueduct system that would transport water from the Owens River to the thirsty city.

Construction of the Los Angeles Aqueduct began in 1908 and was completed in November 5, 1913, a remarkable achievement for its time. The aqueduct spans 233 miles, making it one of the largest engineering projects in the United States. It was an impressive display of human ingenuity and perseverance, as it required the construction of 142 tunnels, numerous reservoirs, and the iconic cascades.

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The Cascades rely on gravity to create a stunning visual display while serving a functional purpose. As the water flows over the series of terraced steps, its velocity increases, allowing it to mix with air and become oxygenated. This natural aeration process helps to maintain water quality and reduce the presence of unwanted gases, such as hydrogen sulfide, which can cause a foul odor.

The cascading waterfall serves as the point where water from the aqueduct is released into the L.A. basin, traveling the final stretch through a series of tunnels and pipelines to reach its ultimate destination: the taps of millions of Los Angeles residents.

William Mulholland opens the Cascades on November 5, 1913.

The Los Angeles Aqueduct was the brainchild of William Mulholland, a self-taught engineer who served as the head of the Los Angeles Department of Water and Power. He was responsible for overseeing the project and ensuring its timely completion.

Fred Eaton, the sixth Anglo child to be born in Los Angeles, was the first “Native Son” Engineer in Los Angeles. As the former mayor of Los Angeles, Eaton played a crucial role in securing the rights to the water in the Owens Valley, which was essential to the aqueduct’s construction. He collaborated with Mulholland in the early stages of planning and development.

Thousands of workers were involved in the construction of the Los Angeles Aqueduct, including laborers, engineers, and surveyors. They toiled under challenging conditions, facing harsh weather, and rough terrain.

The Los Angeles Aqueduct Cascades are an essential part of the aqueduct system. They serve both a practical and symbolic purpose.

The practical function of the cascades is to release the water from the aqueduct at a controlled rate, allowing it to flow into the city’s water distribution system. The cascades rely on gravity to transport water through the system, helping to minimize the need for pumping stations and thereby reducing energy consumption.

Wide shot of the Cascades from Interstate 5 in Southern California

The cascades also serve a symbolic purpose, representing the triumphant arrival of water in Los Angeles. They are a monument to the human spirit and the ingenuity required to bring life-sustaining water to a burgeoning city. The aqueduct allowed Los Angeles to become the thriving metropolis it is today, providing a reliable water supply to millions of residents. The cascades have become a popular tourist destination, allowing visitors to witness firsthand the impressive engineering feat that made the growth of Los Angeles possible.

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