Santa Clara County, California
Santa Clara County, officially the County of Santa Clara, is a county in the U. S. state of California. As of the 2010 census, the population was 1,781,642, the county seat is San Jose, the tenth-most populous city in the United States. Santa Clara County is part of the San Jose-Sunnyvale-Santa Clara, CA Metropolitan Statistical Area as well as the San Jose-San Francisco-Oakland, located at the southern end of the San Francisco Bay, the highly urbanized Santa Clara Valley within Santa Clara County is known as Silicon Valley. Santa Clara is the most populous county in the San Francisco Bay Area region, Santa Clara County is named after Mission Santa Clara, which was established in 1777, and is named for Saint Clare of Assisi. Santa Clara County was one of the counties of California. The original inhabitants included the Ohlone, residing on Coyote Creek, part of the countys territory was given to Alameda County in 1853. In 1882, Santa Clara County tried to levy taxes upon property of the Southern Pacific Railroad within county boundaries.
The result was the U. S. Supreme Court case of Santa Clara County v. Southern Pacific Railroad,118 U. S.394, in which the Court extended Due Process rights to artificial legal entities. In the early 20th Century, the area was promoted as the Valley of the Hearts Delight due to its natural beauty, the first major technology company to be based in the area was Hewlett-Packard, founded in a garage in Palo Alto in 1939. IBM selected San Jose as its West Coast headquarters in 1943, varian Associates, Fairchild Semiconductor, and other early innovators were located in the county by the late 1940s and 1950s. The U. S. Navy had a presence in the area. The term Silicon Valley was coined in 1971, the trend accelerated in the 1980s and 1990s, and agriculture has since been nearly eliminated from the northern part of the county. And Hewlett-Packard, and internet companies eBay, Google, according to the U. S. Census Bureau, the county has a total area of 1,304 square miles, of which 1,290 square miles is land and 14 square miles is water.
The San Andreas Fault runs along the Santa Cruz Mountains in the south, as of 2012, an estimated 400 tule elk roam 1,875 square kilometres in northeastern Santa Clara County and southeastern Alameda County. The vast majority of these Superfund sites were caused by associated with the high tech sector located in Silicon Valley. As of 2013, Santa Clara County has the highest median income of any county in California at $84,741. The 2010 United States Census reported that Santa Clara County had a population of 1,781,642. Hispanic or Latino of any race were 479,210 persons,22. 5% Mexican,0. 4% Puerto Rican,0. 1% Cuban,3. 8% Other Hispanic
The Klamath River flows 263 miles through Oregon and northern California in the United States, emptying into the Pacific Ocean. By average discharge, the Klamath is the second largest river in California after the Sacramento River and it drains an extensive watershed of almost 16,000 square miles that stretches from the arid country of south-central Oregon to the temperate rainforest of the Pacific coast. Unlike most rivers, the Klamath begins in the desert and flows toward the mountains – carving its way through the rugged Cascade Range. The watershed is known for this peculiar geography, and the Klamath has been called a river upside down by National Geographic magazine, the Klamath is the most important North American river south of the Columbia River for anadromous fish migration. Its salmon and rainbow trout have adapted to high water temperatures. The numerous fish were a source of food for Native Americans. Within several decades of settlement, native peoples were forced into reservations.
During the latter days of the California Gold Rush, increasing numbers of miners working the Klamath River and its tributaries. Conflict and introduced diseases left indigenous tribes with only 10% of their original population, steamboats operated briefly on the large lakes of the upper basin, contributing to the growth of towns such as Klamath Falls, before they were replaced by railroads in the late 19th century. In the 19th and 20th centuries, the basin became a productive agricultural region. In the 1960s, the Klamath River was targeted by much larger, one of these projects, the Klamath Diversion, would have reversed the entire flow of the Klamath River to supply farms and urban areas in central and southern California. Today, the Klamath is a recreational river as well as an important source of water for agriculture. It includes many of the longest free-flowing stretches of river in California, however and diversions in the upper basin have often caused water quality issues in the lower half of the river.
Environmental groups and native tribes have proposed changes to water use in the Klamath Basin. The proposal has been endorsed by the U. S. Department of the Interior but has not been authorized by the United States Congress. Upper Klamath Lake, filling a valley at the foot of the eastern slope of the southern High Cascades, is the source of the Klamath River. Its headstreams, begin over 100 miles away—as far as Crater Lake National Park, the Klamath River issues from Klamath Lake at Klamath Falls as a short 1-mile stream known as the Link River, which flows into 18-mile long Lake Ewauna, formed by Keno Dam. Below the dam the river flows west, passing the mostly dry Lower Klamath Lake bed, the Klamath River enters California, where it passes through three more hydroelectric plants and turns south near the town of Hornbrook towards Mount Shasta
Yolo County, California
Yolo County, officially the County of Yolo, is a county located in the northern portion of the U. S. state of California. As of the 2010 census, the population was 200,849, Yolo County is included in the Sacramento-Roseville-Arden-Arcade, CA Metropolitan Statistical Area. The county is located in the Sacramento Valley, much of Yolo County remains a relatively rural agricultural region. In the original act of 1850 the name was spelled Yola, Yolo is a Native American name variously believed to be a corruption of a tribal name Yo-loy meaning a place abounding in rushes or of the name of the chief, Yodo, or of the village of Yodoi. Yolo County was one of the counties of California, created in 1850 at the time of statehood. The county is governed by a board of five district supervisors as well as the governments of its four incorporated cities, West Sacramento and Woodland. According to the U. S. Census Bureau, the county has an area of 1,024 square miles. Transportation in Yolo County is based on a system of numbered county roads, the numbering system works in the following way, North–south roads have numbers from 41 to 117 and increase from west to east.
East–west roads have numbers from 1 to 38A, and from 151 to 161, each integer road number is generally one mile apart, with letters designating occasional roads less than one mile apart. County roads entering urban areas generally are named once they cross the city boundary, some examples include County Road 101 in Woodland being renamed Pioneer Ave and County Road 102 in Davis being named Pole Line Road. Yolobus runs buses throughout Yolo County and into Sacramento, and Sacramento International Airport, the University of California and the city of Davis jointly run Unitrans, a combination local city bus and campus shuttle. Fairfield-Suisun Transit Line 30 stops in Davis on its runs between Fairfield and Sacramento, amtrak has a station in Davis. It is 79 nautical miles northeast of San Francisco, and is centered in the California Central Valley, the following table includes the number of incidents reported and the rate per 1,000 persons for each type of offense. Yolo is a strongly Democratic county in Presidential and congressional elections, the last Republican Presidential candidate to win a majority in the county was Dwight Eisenhower in 1952, which is the longest drought for Republicans in any California county.
However, some Republican Governors have carried Yolo county since then, in the United States House of Representatives, Yolo County is split between Californias 3rd and 6th congressional districts, represented by John Garamendi and Doris Matsui, respectively. In the California State Senate, the county is split between the 3rd and 6th Senate districts, represented by Bill Dodd and Richard Pan, respectively. In the California State Assembly, the county is split between the 4th and 7th Assembly districts, represented by Cecilia Aguiar-Curry and Kevin McCarty, respectively. In November 2008, Yolo was one of just three counties in Californias interior in which voters rejected Proposition 8 to ban gay marriage, Yolo voters rejected Proposition 8 by 58.4 percent to 41.6 percent
Nevada County, California
Nevada County is a County located in the Sierra Nevada of California. As of the 2010 census, the population was 98,764, the county seat is Nevada City. Nevada County comprises the Truckee-Grass Valley, CA Micropolitan Statistical Area and it is located in the Mother Lode Country. Created in 1851, from portions of Yuba County, Nevada County was named after the town of Nevada City. The word nevada is Spanish for snowy or snow-covered, Nevada City was the first to use the word Nevada in its name. In 1851 the newly formed Nevada County used the name as the county seat. The bordering state of Nevada used the name in 1861. The region came to life in the Gold Rush of 1849, many historical sites remain to mark the birth of this important region in Californias formative years. Among them are the Nevada Theatre in Nevada City, the oldest theater built in California in 1865 and it operates to this day and once hosted Mark Twain among other historical figures. The Old 5 Mile House stagecoach stop built in 1890, operates to this day as a provider of hospitality spanning three centuries, the gold industry in Nevada County thrived into the post WWII days.
The county had many firsts and historic technological moments, the first long-distance telephone in the world, built in 1877 by the Ridge Telephone Company, connected French Corral with French Lake,58 miles away. It was operated by the Milton Mining Company from a building on site that had been erected about 1853. The Pelton wheel, designed to power gold mines, still drives hydro-electric generators today, Nevada City and Grass Valley were among the first California towns with electric lights. The Olympics, NASA, and virtually every television station around the country utilizes video/broadcasting equipment designed and manufactured by Grass Valley Group, founded in Grass Valley. The Nevada County Narrow Gauge Railroad was built in 1876, and was the railroad in the West that was never robbed. The rail line closed in 1942 and was torn up for scrap, in Grass Valley the historic Holbrooke Hotel opened in 1851 and housed Mark Twain, Bret Harte, and four U. S. presidents. The Community of Rough and Ready seceded from the Union for a time and became the Great Republic of Rough and Ready.
According to the U. S. Census Bureau, the county has an area of 974 square miles
Yuba County, California
Yuba County is a county located in the U. S. state of California. As of the 2010 census, the population was 72,155, Yuba County is included in the Yuba City, CA Metropolitan Statistical Area, which is included in the Sacramento-Roseville, CA Combined Statistical Area. The county is located in Californias Central Valley along the Feather River, Yuba County was one of the original counties of California, formed in 1850 at the time of statehood. Parts of the territory were given to Placer County in 1851, to Nevada County in 1851. The county was named after the Yuba River by Captain John Sutter for the Native American village Yubu, Yupu or Juba near the confluence of the Yuba and Feather rivers. General Mariano Vallejo stated that the river was named Uba by an expedition in 1824 because of the quantities of wild grapes which they found growing on its banks. According to the U. S. Census Bureau, the county has an area of 644 square miles. It is the fifth-smallest county in California by total area, the county lies along the western slope of the Sierra Nevada, the steep slopes making it prime territory for the siting of hydroelectric power plants.
A portion of the county, where Marysville and most of the lives, is west of the mountains on the valley floor. There is a deal of agriculture business in this part of the county, especially fruit orchards, rice fields. National protected areas within Yuba County include portions of the Plumas National Forest, in addition to these identified protected areas the county has extensive natural areas consisting of forestation, riparian area and other habitats. The county exhibits a diversity of flowering plant species, among which is the yellow mariposa lily. The following table includes the number of reported and the rate per 1,000 persons for each type of offense. Yuba is a strongly Republican county in Presidential and congressional elections, the last Democrat to win a majority in the county was Jimmy Carter in 1976. In the United States House of Representatives, Yuba County is in Californias 3rd congressional district, in the California State Legislature, the county is in the 4th Senate District, represented by Republican Jim Nielsen, and the 3rd Assembly District, represented by Republican James Gallagher.
State Route 20 State Route 49 State Route 65 State Route 70 Yuba Sutter Transit operates local bus service, Yuba County Airport is located three miles south of Marysville. It is a general aviation airport, Brownsville Aero Pines Airport is located off La Porte Rd in Brownsville. The 2010 United States Census reported that Yuba County had a population of 72,155
Nature reserves may be designated by government institutions in some countries, or by private landowners, such as charities and research institutions, regardless of nationality. Nature reserves fall into different IUCN categories depending on the level of protection afforded by local laws, early reservations often had a religious underpinning, such as the evil forest areas of West Africa which were forbidden to humans, who were threatened with spiritual attack if they went there. Sacred areas taboo from human entry to fishing and hunting are known by ancient cultures worldwide. The worlds first modern nature reserve was established in 1821 by the naturalist and explorer Charles Waterton around his estate in Walton Hall and he spent £9000 on the construction of a 3 mile long,9 ft tall wall to enclose his park from poachers. He tried to encourage birdlife by planting trees and hollowing out trunks for owls to nest in and he invented artificial nest boxes to house starlings and sand martins and unsuccessfully attempted to introduce little owls from Italy.
Drachenfels was protected as the first state-designated nature reserve in modern-day Germany, in Australia, a nature reserve is the title of a type of protected area used in the jurisdictions of the Australian Capital Territory, New South Wales and Western Australia. The term “nature reserve” is defined in the relevant statutes used in those states and territories rather than by a national statute. As of 2014,1767 out of a total of 10339 protected areas listed within the Australian National Reserve System used the term “nature reserve in their names, in Brazil, nature reserves are classified as ecological stations or biological reserves by the National System of Conservation Units. Their main objectives are preserving fauna and flora and other natural attributes, visits are allowed only with permission, and only for educational or scientific purposes. Changes to the ecosystems in both types of reserve are allowed to restore and preserve the balance, biological diversity. Ecological stations are allowed to change the environment within strictly defined limits for the purpose of scientific research.
A wildlife reserve in Brazil is protected, and hunting is not allowed, there are 30 nature reserves in Egypt which cover 12% of Egyptian land. Those nature reserves were built according to the laws no, 102/1983 and 4/1994 for protection of the Egyptian nature reserve. Egypt announced a plan from to build 40 nature reserves from 1997 to 2017, to protect the natural resources. The largest nature reserve in Egypt is Gebel Elba in the southeast, denmark has three national parks and several nature reserves, some of them inside the national park areas. The largest single reserve is Hanstholm Nature Reserve, which covers 40 km2 and is part of Thy National Park, in Sweden there are 29 national parks. The first of them were established in 1909, in fact, Sweden was the first European country that established 9 national parks. There are almost 4,000 nature reserves in Sweden and they comprise about 85% of the surface that is protected by the Swedish Enironmental Code
Modoc County, California
Modoc County is a county located in the far northeast corner of the U. S. state of California. As of the 2010 census, the population was 9,686, making it the third-least populous county in California. The county seat and only incorporated city is Alturas, previous county seats include Lake City and Centerville, the latter is now a ghost town. The county borders Nevada and Oregon, a large portion of Modoc County is federal land. The countys official slogans include The last best place and Where the West still lives, prior to the arrival of Europeans in the region, varying cultures of Native Americans inhabited the county for thousands of years. At the time of European encounter, the Modoc people lived in what is now northern California, near Lost River, the county was named after them. The Achumawi, and the Paiute lived in the area, to the north were the Klamath in present-day Oregon. The first European explorers to visit Modoc County were the American John C, frémont and his traveling party in 1846, who had departed from Sutters Fort near the confluence of the American and Sacramento Rivers.
The northern boundary of California, and eventually Modoc County, had established as the 42nd parallel since the time of Mexican possession. In the absence of a survey of the 120th meridian. The Territory of Utah requested jurisdiction to the summit of the Sierra Nevada, at the time, the Warner Mountains were believed to be a part of the Sierra Nevada, so this would have included Surprise Valley, but California denied the request. In 1856, the residents of Honey Lake Valley reckoned the 120th meridian to be west of their valley, placing them in Utah territory, Nataqua would have included Modoc County. Increasing traffic on the emigrant trail, unprovoked militia raids on innocent Modoc, in 1864, the Klamath and Yahooskin band of the Shoshone signed a treaty ceding lands in both Oregon and California, and the tribes were colocated on the Klamath Reservation. Harassed by the Klamath, traditional competitors, a band of Modoc led by Captain Jack returned to California, the Modoc War of 1872-73 brought nationwide attention to the Modoc during the protracted battles.
From strong defensive positions in the tubes,52 Modoc warriors held off hundreds of US Army forces. Peace talks in 1873 stalled when the Modoc wanted their own reservation in California, more Army troops were called in to lay siege to Captain Jacks Stronghold. Dissension arose, and some Modoc surrendered, finally most were captured, and those responsible for the assassinations were tried and executed. More than 150 Modoc were transported to Indian Territory as prisoners of war, the area has since been designated the Lava Beds National Monument
Trinity County, California
Trinity County is a county located in the northwestern part of the state of California. As of the 2010 census, the population was 13,786, the county seat and largest community is Weaverville. Weaverville has the distinction of housing some of Californias oldest buildings, the courthouse, built in 1856, is the second oldest in the state, and the Weaverville Drug Store has been filling prescriptions since 1852. The Joss House is an historic Taoist temple built in 1873, Trinity County is rugged, heavily forested, and lies along the Trinity River within the Salmon and Klamath Mountains. The county has no lights, no freeways, no parking meters. It did not have a store or restaurant until 1999, Burger King, Movie Gallery, Longs Drugs. The county takes its name from the Trinity River, named in 1845 by Major Pierson B, who was under the mistaken impression that the river emptied into Trinidad Bay. Trinity is the English translation of Trinidad, Trinity County was one of the original counties of California, created in 1850 at the time of statehood.
Parts of the county were given to Klamath County in 1852, according to the U. S. Census Bureau, the county has a total area of 3,208 square miles, of which 3,179 square miles is land and 28 square miles is water. The county contains a significant portion of Shasta-Trinity National Forest, home to the Trinity Alps, the county hosts many visitors, especially during summer months, for camping and fishing. The summers tend to be clear, sunny and very dry, the winters tend to have copious precipitation, falling mostly as rain under 1000m/3300 ft in the valley bottoms, and mostly as snow over 1000m/3300 ft on the mountainsides. December and February are the wettest, there is an extensive wild river and stream system, and the terrain is quite rugged and forested, with the highest points at around 9,000 ft. The Klamath Mountains occupy the vast portion of the county, before 2008, the last Democrat to win in the county was Jimmy Carter in 1976. However, in 2008, Democrat Barack Obama defeated Republican candidate John McCain by a four percent margin, in 2012, the county narrowly voted Republican.
Voter registration reflects this trend with Democratic and Republican registration in a dead heat. It was Perots best performance in the state in 1996, Trinity County is in Californias 2nd congressional district, represented by Democrat Jared Huffman. In the state legislature Trinity is in the 4th Senate District, represented by Republican Jim Nielsen, on November 2,2010 Trinity county voted against Proposition 19 which would have taxed and regulated marijuana. State Route 3 State Route 36 State Route 299 Trinity Transit provides weekday intercity bus service on State Routes 3 and 299, with connecting service in Willow Creek, service is provided from Weaverville to Lewiston and Hayfork
Napa County, California
Napa County is a county located north of San Pablo Bay in the northern portion of the U. S. state of California. As of the 2010 census, the population was 136,484, the county seat is the City of Napa. Napa County was one of the counties of California, created in 1850 at the time of statehood. Parts of the territory were given to Lake County in 1861. Napa County comprises the Napa, CA Metropolitan Statistical Area, which is included in the San Jose-San Francisco-Oakland. It is one of four North Bay counties, in prehistoric times, the valley was inhabited by the Patwin Native Americans, with possible habitation by Wappo tribes in the northwestern foothills. Most villages are thought to have been constructed near the floodplains of watercourses that drain the valley and their food consisted of wild roots, small animals, earthworms and bread made from crushed California buckeye kernels. In winter they would construct huts made of tree branches, in summer they camped near rivers and streams. In winter months, they were clad in wild animal skins.
The maximum prehistoric population is not to have exceeded 5000 persons. In 1776, a fort was erected by the Spanish Governor, Felipe de Neve a short distance northwest of Napa, francis Castro and Father Jose Altimura were the first Europeans to explore the Napa Valley in 1823. When the first white settlers arrived in the early 1830s, there were six tribes in the valley speaking different dialects, the Mayacomos tribe lived in the area where Calistoga was founded. The Callajomans were in the area near where the town of St. Helena now stands, further south, the Kymus dwelt in the middle part of the valley. The Napa and Ulcus tribes occupied part of the area where the City of Napa now exists while the Soscol tribe occupied the portion that now makes up the end of the valley. Many of the native peoples died during an epidemic in 1838. Settlers killed several over claims of cattle theft, during the era between 1836 and 1846, when California was a province of independent Mexico, the following 13 ranchos were granted in Napa County, George C.
Yount was a settler in Napa County and is believed to be the first Anglo-Saxon resident in the county. In 1836 Yount obtained the Mexican grant Rancho Caymus where he built what is said to be the first log house in California, soon afterward, he built a sawmill and grain mill, and was the first person to plant a vineyard in the county
Mendocino County, California
Mendocino County is a county located on the north coast of the U. S. state of California. As of the 2010 census, the population was 87,841, Mendocino County comprises the Ukiah, CA Micropolitan Statistical Area. It is located north of the San Francisco Bay Area and west of the Central Valley, the county is noted for its distinctive Pacific Ocean coastline, Redwood forests, wine production and liberal views about the use of cannabis and support for its legalization. It is estimated that roughly one-third of the economy is based on the cultivation of marijuana, the notable historic and recreational attraction of the Skunk Train connects Fort Bragg with Willits in Mendocino County via a steam-locomotive engine, along with other vehicles. Mendocino County was one of the counties of California, created in 1850 at the time of statehood. Due to an initially minor white American population, it did not have a government until 1859 and was under the administration of Sonoma County prior to that. Some of the land was given to Sonoma County between 1850 and 1860.
Mendocino is the form of the family name of Mendoza. Establishment of the Round Valley Indian Reservation in March 30,1870, many of these tribes thrown together were not friends with the other tribes they were forced to live with on the reservation, resulting in tensions still evident today. According to the U. S. Census Bureau, the county has an area of 3,878 square miles. The 2010 United States Census reported that Mendocino County had a population of 87,841. The racial makeup of Mendocino County was 67,218 White,622 African American,4,277 Native American,1,450 Asian,119 Pacific Islander,10,185 from other races, Hispanic or Latino of any race were 19,505 persons. As of the census of 2000, there were 86,265 people,33,266 households, the population density was 25 people per square mile. There were 36,937 housing units at a density of 10 per square mile. The racial makeup of the county was 80. 8% White,0. 6% Black or African American,4. 8% Native American,1. 2% Asian,0. 2% Pacific Islander,8. 6% from other races, and 3. 9% from two or more races. 16.
5% of the population were Hispanic or Latino of any race,12. 2% were of German,10. 8% English,8. 6% Irish,6. 1% Italian and 5. 6% American ancestry according to Census 2000. 84. 4% spoke English and 13. 2% Spanish as their first language,27. 0% of all households were made up of individuals and 10. 4% had someone living alone who was 65 years of age or older. The average household size was 2.53 and the family size was 3.04
A fish ladder, known as a fishway, fish pass or fish steps, is a structure on or around artificial and natural barriers to facilitate diadromous fishes natural migration. Most fishways enable fish to pass around the barriers by swimming and leaping up a series of low steps into the waters on the other side. Written reports of rough fishways date to 17th-century France, where bundles of branches were used to create steps in steep channels to bypass obstructions. A version was patented in 1837 by Richard McFarlan of Bathurst, New Brunswick, Canada, in 1852–1854, the Ballisodare Fish Pass was built in County Sligo in Ireland to draw salmon into a river that had not supported a fishery. In 1880, the first fish ladder was built in Rhode Island, United States, the ladder was removed in 1924, when the City of Providence replaced the wood dam with a concrete one. As the Industrial Age advanced and other river obstructions became larger and more common, leading to the need for effective fish by-passes.
There are six types of fishways and weir Baffle fishway Fish elevator Rock-ramp fishway Vertical-slot fish passage Fish siphon A pool. It uses a series of dams and pools of regular length to create a long, sloping channel for fish to travel around the obstruction. The channel acts as a lock to gradually step down the water level, to head upstream. A baffle fishway uses a series of symmetrical close-spaced baffles in a channel to redirect the flow of water, Baffle fishways need not have resting areas, although pools can be included to provide a resting area or to reduce the velocity of the flow. Such fishways can be built with switchbacks to minimize the space needed for their construction, baffles come in variety of designs. The original design for a Denil fishway was developed in 1909 by a Belgian scientist, G. Denil, the Alaskan Steeppass, for example, is a modular prefabricated Denil-fishway variant originally designed for remote areas of Alaska. A fish elevator or fish lift, as its name implies and it is well suited to tall barriers.
With a fish elevator, fish swim into an area at the base of the obstruction. When enough fish accumulate in the area, they are nudged into a hopper that carries them into a flume that empties into the river above the barrier. On the Connecticut River, for example, two fish elevators lift up to 500 fish at a time,52 feet, to clear the Holyoke Dam, in 2013, the elevator carried over 400,000 fish. A rock-ramp fishway uses large rocks and timbers to create pools, because of the length of the channel needed for the ladder, such structures are most appropriate for relatively short barriers. They have a significant advantage in that they can provide fish spawning habitat, a vertical-slot fish passage is similar to a pool-and-weir system, except that each dam has a narrow slot in it near the channel wall
El Dorado County, California
El Dorado County, officially the County of El Dorado, is a county in the U. S. state of California. As of the 2010 census, the population was 181,058, El Dorado County is part of the Sacramento-Roseville-Arden-Arcade, CA Metropolitan Statistical Area. It is in the historic Gold Country in the Sierra Nevada, El Dorado Countys population has grown as Greater Sacramento has expanded into the region. The County of El Dorado was one of Californias original 27 counties created effective February 18,1850 and its name is derived from the Spanish meaning the gilded/golden. The final segments of the Pony Express mail route ran through El Dorado County until its replacement with the service in 1861. Mother lode James W. S. Census Bureau, the county has an area of 1,786 square miles. The racial makeup of El Dorado County was 156,793 White,1,409 African American,2,070 Native American,6,297 Asian,294 Pacific Islander,7,278 from other races, and 6,917 from two or more races. Hispanic or Latino of any race were 21,875 persons, the largest growth in the county has come in El Dorado Hills where the population grew by 24,092 residents to a total of 42,108 since 2000.
As of the census of 2000, there were 156,299 people,58,939 households, the population density was 91 people per square mile. There were 71,278 housing units at a density of 42 per square mile. The racial makeup of the county was 89. 7% White,0. 5% Black or African American,1. 0% Native American,2. 1% Asian,0. 1% Pacific Islander,3. 6% from other races, and 3. 0% from two or more races. 9. 3% of the population were Hispanic or Latino of any race,14. 9% were of German,13. 4% English,10. 3% Irish,6. 6% Italian and 6. 6% American ancestry according to Census 2000. 90. 5% spoke English and 6. 5% Spanish as their first language,20. 1% of all households were made up of individuals and 7. 3% had someone living alone who was 65 years of age or older. The average household size was 2.63 and the family size was 3.04. In the county, the population was out with 26. 1% under the age of 18,6. 8% from 18 to 24,27. 8% from 25 to 44,26. 9% from 45 to 64. The median age was 39 years, for every 100 females there were 99.5 males.
For every 100 females age 18 and over, there were 97.3 males, the 2000 census states that the median income for a household in the county was $51,484, and the median income for a family was $60,250. Males had an income of $46,373 versus $31,537 for females