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In southern California, an engineering error in 1905 diverted the Colorado River, formed the Salton Sea in a depression below sea level, and created a story that went through luxury tourism, environmental crisis, toxic dust, and lithium reserves valued at US$ 540 billion.
The engineering error that diverted the Colorado River in 1905 created one of California’s most unlikely phenomena: a giant sea in the middle of the desert. Where there was once sand, salt, and cacti, the Salton Sea emerged, stretching for dozens of kilometers and a history marked by luxury, abandonment, and environmental risk.
More than a century later, the same place that was once sold as a tourist paradise and later became a symbol of degradation may gain a new strategic role. Beneath its warm waters and active subsoil, there are lithium reserves valued at US$ 540 billion, an essential metal for electric car batteries and energy storage.
Salton Sea was born in a depression below ocean level
The Salton Sea is located in southern California, about two hours by car from San Diego, in one of the driest regions of the United States. The area experiences extreme heat, with temperatures that can exceed 48°C, and very low annual rainfall.
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The location is about 56 kilometers long and nearly 900 km², a size comparable to a large metropolis. The most important detail is that this sea is within a depression with no outlet to the ocean.
The lowest point of the region is approximately 80 meters below sea level. This means that any water entering there does not naturally flow to the Pacific; it accumulates until it evaporates.
This terrain shape was decisive. Without this natural cavity, the diversion of the Colorado River could have caused temporary floods. With it, the accident turned into an entire sea.
Geological fault prepared the ground for the disaster
Before the human error, geology itself had already created the conditions for the Salton Sea to exist. The region lies over an area where large blocks of the Earth’s crust slowly move apart, a process related to the opening of the Gulf of California.
When these blocks move apart, the ground between them sinks. This slow movement, over millions of years, helped form the depression where water accumulated.
The same geological activity also brings heat from the Earth’s interior close to the surface. According to the source, at just 3 kilometers deep, the temperature can exceed 350°C.
This underground heat seemed just a geological curiosity, but it would become a central piece of the region’s economic future, as it is linked to the hot waters that carry dissolved lithium.
Colorado River had already created ancient lakes in the region
The Salton Sea was not the first lake to occupy that area. Scientists have identified marks of ancient lakes at the same spot, known as Lake Cahuilla, formed when the Colorado River naturally changed course in other periods.
These lakes would appear, last a few centuries, and then dry up. The last natural formation is said to have occurred before the arrival of Europeans in the region, preserved even in the oral memory of local indigenous peoples.
This shows that the Salton has always been a place prone to receiving water when the Colorado River diverted. The engineering error of 1905 did not invent this tendency; it merely triggered an ancient geographical cycle again.
The difference is that, this time, the change did not come from a natural process. It came from a human attempt to control the river to irrigate crops in the desert.
Engineering error in 1905 diverted the entire river
At the beginning of the 20th century, the Imperial Valley was seen as a promising agricultural frontier. The soil was fertile, but water was lacking. To solve this, engineers created a system to bring part of the Colorado River to the region.
The project included the Alamo Canal, used to transform the desert into a productive area. In the early years, the system worked and attracted investors, but the canal began to clog with earth and sand carried by the river.
In 1904, to save the crop, engineers opened a temporary passage on the riverbank, without an adequate fixed barrier. When the floods of 1905 came, the water broke through the control and the entire Colorado River changed course.
For almost two years, workers tried to close the opening with tons of stones. Trains dumped rocks day and night, but the river kept flowing into the depression. Only in February 1907 did engineering manage to regain control.
An entire sea appeared in less than two years
When the river finally returned to its normal course, the damage was already done. The depression had transformed into a sea over 50 kilometers long, with an average depth of about 9 meters and an estimated volume of around 7 km³ of water.
Roads, farms, and occupied areas were submerged. Some communities had to be abandoned or rebuilt on higher ground. The local geography changed quickly enough to require maps to be redrawn.
At the time, there was discussion about what to do with that body of water. Many believed that the desert sun would evaporate it all in a few decades.
But the agricultural drainage water from the Imperial Valley continued to feed the Salton. What seemed temporary became permanent, sustained by irrigation leftovers that flowed to the lowest point in the region.
Hollywood turned the accident into a luxury destination
In the following decades, the Salton Sea ceased to be seen merely as a problem and began to be treated as a tourist opportunity. In the 1950s, entrepreneurs marketed that body of water in the desert as a rare, sunny, and sophisticated destination.
Names linked to Hollywood, such as Frank Sinatra and Frank Capra, bought properties in the region. Cities like Salton City, Bombay Beach, and Desert Shores began selling lots and attracting visitors.
The place was even called the California Riviera, in reference to the luxury of the French coast. Boat competitions and sophisticated clubs reinforced the image of an artificial paradise.
But the success depended on ignoring a basic problem: the Salton Sea had no outlet. Everything that entered there, stayed. And, over time, this would turn the paradise into an environmental crisis.
Salt, pesticides, and evaporation changed everything
The structural defect of the Salton Sea is simple. The water evaporates under the desert sun, but the salt and residues remain. Year after year, fertilizers, pesticides, and minerals brought by agricultural drainage accumulated.
The source indicates that the salinity of the Salton Sea exceeded 60 grams per liter, while the ocean is around 35 grams per liter. This means that the Salton has become almost twice as salty as the Pacific.
In 1999, the imbalance appeared dramatically: millions of tilapias died in a single day due to lack of oxygen in the water, forming lines of dead fish along the beaches.
The smell of hydrogen sulfide, similar to rotten eggs, could be carried by the wind to distant areas. The same characteristic that allowed the sea to form began to contribute to its degradation.
Toxic dust became a threat to nearby communities
Starting in the 2000s, the Salton Sea began to shrink more rapidly. With less water entering and constant evaporation, areas of the seabed became exposed.
This dry seabed is not ordinary sand. Over decades, it accumulated chemical residues, heavy metals, and salts. When strong winds blow, the dust is lifted and can travel long distances.
The source cites the presence of metals such as arsenic, selenium, cadmium, and lead in this exposed layer. It also reports that fine particles can reach regions like Los Angeles, Palm Springs, and San Diego.
The health impact is concerning. Communities near the sea report respiratory problems, and children in the area appear particularly vulnerable. The dust has turned an old mistake into a current public health issue.
Lithium of US$ 540 billion changes the fate of the Salton
Beneath the environmental crisis, a discovery emerged capable of repositioning the Salton Sea on the energy map. The region’s underground hot waters carry a large amount of dissolved lithium.
The United States Department of Energy estimates that the reserves exceed 18 million tons, valued at about US$ 540 billion, according to the source. This volume would be enough to manufacture more than 375 million electric car batteries.
Lithium is essential for modern batteries, used in electric cars, solar and wind energy storage, and portable devices. Therefore, the region has come to be called Lithium Valley.
Companies like General Motors, Stellantis, and Berkshire Hathaway are associated with investments to explore this potential. The same geological heat that helped explain the formation of the region can now sustain a new economic rush.
From environmental accident to energy dispute
A history of the Salton Sea sums up a rare transformation. In 1905, it was born from an engineering mistake. In the 1950s, it became a symbol of leisure and luxury. In the 2000s, it became remembered for dead fish, bad odor, and toxic dust.
Now, amidst the energy transition, it appears as a potential strategic source of lithium for batteries. Few places show so clearly how a disaster can turn into an opportunity without ceasing to be a problem.
The challenge is that lithium exploration does not erase the environmental crisis. The region still faces high salinity, contaminated dust, water loss, and impacts on nearby communities.
The central question is whether the new wealth will be used only to supply electric cars or also to address the environmental debt left by more than a century of human decisions.
Salton Sea shows the price of trying to control nature
The Salton Sea was born when engineering tried to dominate the Colorado River and failed. Geology prepared the basin, human error opened the door, and water turned the desert into a sea.
More than 120 years later, the same place gathers contradictions hard to ignore: beauty, abandonment, disease, technology, lithium, and money. It is a landscape created by accident, sustained by imbalance, and now coveted by the energy industry.
If the $540 billion lithium truly transforms the region, the Salton Sea may enter a new phase. But the past shows that every intervention in this territory comes at a cost.
And you, do you think lithium exploration can repair part of the Salton Sea’s damage, or could this new cycle repeat another engineering mistake in the name of clean energy? Share your opinion.
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