Lake Havasu ( / ˈ h ɑː v ə s uː / ) is a large reservoir formed by Parker Dam on the Colorado River , on the border between San Bernardino County, California , and Mohave County, Arizona . Lake Havasu City sits on the Arizonan side of the lake with its Californian counterpart of Havasu Lake directly across the lake. The reservoir has an available capacity of 619,400 acre-feet (0.7640 km). The concrete arch dam was built by the United States Bureau of Reclamation between 1934 and 1938. The lake's primary purpose is to store water for pumping into two aqueducts . Prior to the dam construction, the area was home to the Mojave people . The lake was named (in 1939) after the Mojave word for blue . In the early 19th century, it was frequented by beaver trappers. Spaniards also began to mine the areas along the river.
30-685: Mark Wilmer Pumping Plant pumps water into the Central Arizona Project Aqueduct . Whitsett Pumping Plant is located on the lake, and lifts the water 291 feet (89 m) for the Colorado River Aqueduct . Gene Pumping Plant, south of Gene Wash Reservoir, is west-southwest of Parker Dam and gives the water an additional boost of 303 feet (92 m). The Colorado River Aqueduct has three more pumping plants: Iron Mountain (144 feet (44 m)), Eagle Mountain (438 feet (134 m)), and Julian Hinds (441 feet (134 m)). The total lift
60-661: A dash ; for example, 1-21-00.26 ha would mean 1 hectare, 21 ares, and 0.26 centiares (12,100.26 m ). The metric system of measurement was first given a legal basis in 1795 by the French Revolutionary government. The law of 18 Germinal, Year III (7 April 1795) defined five units of measure: In 1960, when the metric system was updated as the International System of Units (SI), the are did not receive international recognition. The International Committee for Weights and Measures ( CIPM ) makes no mention of
90-404: A double prefix is non-standard. The decimilliare is (100 mm) or roughly a four-inch-by-four-inch square. The centiare is one square metre. The deciare (rarely used) is ten square metres. The are ( / ɑːr / or / ɛər / ) is a unit of area, equal to 100 square metres ( 10 m × 10 m ), used for measuring land area. It was defined by older forms of the metric system , but
120-439: A few other units including the are (and implicitly the hectare ) whose use was limited to the measurement of land. The names centiare , deciare , decare and hectare are derived by adding the standard metric prefixes to the original base unit of area, the are . The decimilliare (dma, sometimes seen in cadastre area evaluation of real estate plots) is 1 ⁄ 10,000 are or one square decimetre. Such usage of
150-542: A measure of land area. The names of the older land measures of similar size are usually used, redefined as exactly one decare: The most commonly used units are in bold . One hectare is also equivalent to: The Unicode character U+33CA ㏊ SQUARE HA , in the CJK Compatibility block, is intended for compatibility with pre-existing East Asian character codes. It is not intended for use in alphabetic contexts. U+3336 ㌶ SQUARE HEKUTAARU
180-467: Is 1,617 feet (493 m). The shorelines are in the ecotone (transition zone) of the higher Mojave Desert to the lower Sonoran Desert and its Californian Colorado Desert ecoregions . The Havasu National Wildlife Refuge is located at the upper end and upriver. Lake Havasu State Park is along the eastern shore in Arizona. The Bill Williams River National Wildlife Refuge extends southeastward up
210-439: Is a non-SI metric unit of area equal to a square with 100- metre sides (1 hm ), that is, 10,000 square metres (10,000 m ), and is primarily used in the measurement of land. There are 100 hectares in one square kilometre. An acre is about 0.405 hectares and one hectare contains about 2.47 acres. In 1795, when the metric system was introduced, the are was defined as 100 square metres , or one square decametre , and
240-451: Is now outside the modern International System of Units (SI). It is still commonly used in speech to measure real estate, in particular in Indonesia, India, and in various European countries. In Russian and some other languages of the former Soviet Union , the are is called sotka (Russian: сотка : 'a hundred', i.e. 100 m or 1 ⁄ 100 hectare). It is used to describe
270-479: The New Waddell Dam , followed. The backbone aqueduct system, which runs about 336 miles (541 km) from Lake Havasu to a terminus 14 miles (23 km) southwest of Tucson, was declared substantially complete in 1993. The new and modified dams constructed as part of the project were declared substantially complete in 1994. All of the non-Native American agricultural water distribution systems were completed in
300-618: The are in the 2019 edition of the SI brochure, but classifies the hectare as a "Non-SI unit accepted for use with the International System of Units". In 1972, the European Economic Community (EEC) passed directive 71/354/EEC, which catalogued the units of measure that might be used within the Community. The units that were catalogued replicated the recommendations of the CGPM, supplemented by
330-902: The riparian zone of the Bill Williams River canyon from the southeastern end of the reservoir and dam. Lake Havasu is well known for its recreational fishing and boating, which bring in about a million visitors a year. Fishing tournaments are often held on the lake, where bass are the main catch. Fish list : Largemouth bass , Smallmouth bass , Striped bass , Carp , Catfish (Channel) , Catfish (Flathead) , Crappie , Razorback sucker , Redear Sunfish , Sunfish (Cetrarchidae) . White sturgeon were stocked in Lake Havasu in 1967 and 1968 from stock obtained from San Pablo Bay, California. While some dead sturgeon were found downstream from Havasu (probably killed during passage over dams), living fish have not been recorded, but may still exist along
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#1732854913511360-734: The Central Arizona Project (CAP) aimed at providing Arizona's share of the Colorado River to the state. McFarland's efforts failed as senator; however, they laid a critical foundation for the eventual passage of the CAP in the late 1960s. According to the Arizona Republic , Senator Barry Goldwater , Senator Hayden , Representative Morris Udall , US Secretary of the Interior Stewart Udall and other Arizona leaders teamed up on
390-785: The Orme Division was reformulated and renamed the Regulatory Storage Division. Upon completion, the Granite Reef Division was renamed the Hayden-Rhodes Aqueduct, and the Salt-Gila Division was renamed the Fannin-McFarland Aqueduct. The 456 billion gallons (1.4 million acre feet) of water is lifted by up to 2,900 feet by 14 pumps using 2.5 million MWh of electricity each year [285 MW], making CAP
420-458: The SI, being equivalent to a square hectometre. It is widely used throughout the world for the measurement of large areas of land, and it is the legal unit of measure in domains concerned with land ownership, planning, and management , including law ( land deeds ), agriculture, forestry , and town planning throughout the European Union , New Zealand and Australia (since 1970). However,
450-996: The United Kingdom, the United States, Myanmar (Burma), and to some extent Canada, use the acre instead of the hectare for measuring surface or land area. Some countries that underwent a general conversion from traditional measurements to metric measurements (e.g. Canada) required a resurvey when units of measure in legal descriptions relating to land were converted to metric units. Others, such as South Africa, published conversion factors which were to be used particularly "when preparing consolidation diagrams by compilation". In many countries, metrification redefined or clarified existing measures in terms of metric units. The following legacy units of area have been redefined as being equal to one hectare: In Mexico, land area measurements are commonly given as combinations of hectares, ares, and centiares. These are commonly written separated by
480-506: The dekare/decare daa (1,000 m ) and are (100 m ) are not officially "accepted for use", they are still used in some contexts. The hectare ( / ˈ h ɛ k t ɛər , - t ɑː r / ), although not a unit of SI, is the only named unit of area that is accepted for use with SI units . The name was coined in French, from the Latin ārea . In practice the hectare is fully derived from
510-619: The delivery of power and energy over the transmission facilities to delivery points within the Central Arizona Project service area. Construction of the project began in 1973 with the award of a contract for the Havasu Intake Channel Dike and excavation for the Havasu Pumping Plant (later renamed as the Mark Wilmer Pumping Plant) on the shores of Lake Havasu . Construction of the other project features, such as
540-472: The eastern shore of Lake Havasu. Arizona State Parks operates Lake Havasu State Park and Cattail Cove State Park on the eastern shore of the lake. The northern part of the lake is included in the Havasu National Wildlife Refuge . Havasu Springs Resort, a BLM concession, operates on the south edge of Lake Havasu. Black Meadow Landing, another BLM concession, operates on the wast bank of
570-469: The hectare (" hecto- " + "are") was thus 100 ares or 1 ⁄ 100 km (10,000 square metres). When the metric system was further rationalised in 1960, resulting in the International System of Units ( SI ), the are was not included as a recognised unit. The hectare, however, remains as a non-SI unit accepted for use with the SI and whose use is "expected to continue indefinitely". Though
600-670: The initial implementation was called a "debacle" by the Tucson Weekly . The river water had a different mineral mixture and flow pattern from the aquifer water, stirring up and dislodging rust and biofilm in municipal water mains and house pipes. By the end of 1993, the city of Tucson paid about $ 145,000 to install filters in 925 homes, lost about $ 200,000 in revenues by adjusting water bills, and paid about $ 450,000 in damages claimed by homeowners for ruined pipes, water heaters, and other appliances. The city returned some houses to groundwater , but problems remained. Zinc orthophosphate
630-658: The lake. Central Arizona Project Aqueduct The Central Arizona Project ( CAP ) is a 336 mi (541 km) diversion canal in Arizona in the southern United States. The aqueduct diverts water from the Colorado River at the Bill Williams Wildlife Refuge south portion of Lake Havasu near Parker into central and southern Arizona. CAP is managed and operated by the Central Arizona Water Conservation District (CAWCD). It
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#1732854913511660-576: The largest power user in Arizona. Lake Pleasant is used as a buffer. The canal loses approximately 16,000 acre-feet (5.2 billion gallons) of water each year to evaporation. It loses 9,000 acre-feet (2.9 billion gallons) annually from water seeping or leaking through the concrete. The CAP was created by the Colorado River Basin Project Act of 1968, signed by US President Lyndon B. Johnson on September 30, 1968. Senator Ernest McFarland , along with Senator Carl Hayden , lobbied for
690-740: The late 1980s, as were most of the municipal water delivery systems. Several Native American distribution systems remain to be built; it is estimated that full development of these systems could require another 10 to 20 years. The Hayden-Rhodes Aqueduct, which carries water from Lake Havasu to the Phoenix area, includes three tunnels totaling 8.2 miles. The CAP partly funded the Brock Reservoir project with $ 28.6 million. In return for its contribution, Arizona has been awarded 100,000 acre-feet (120,000,000 m ) of water per year since 2016. The CAP project brought river water to Tucson successfully, but
720-472: The metropolitan areas of Phoenix and Tucson . Authorization also was included for development of facilities to deliver water to Catron , Hidalgo , and Grant counties in New Mexico , but these facilities have not been constructed because of cost considerations, a lack of demand for the water, lack of repayment capability by the users, and environmental constraints. In addition to its water supply benefits,
750-498: The project also provides substantial benefits from flood control , outdoor recreation, fish and wildlife conservation, and sediment control . It also produces an unintended swale , further increasing local biodiversity. The project was subdivided, for administration and construction purposes, into the Granite Reef, Orme, Salt-Gila, Gila River , Tucson , Indian Distribution, and Colorado River divisions. During project construction,
780-580: The size of suburban dacha or allotment garden plots or small city parks where the hectare would be too large. Many Russian dachas are 6 ares in size (in Russian, шесть соток ). The decare or dekare ( / ˈ d ɛ k ɑːr , - ɛər / ) is derived from deca and are , and is equal to 10 ares or 1000 square metres. It is used in Norway and in the former Ottoman areas of the Middle East and Bulgaria as
810-513: The southern end of Lake Havasu near Parker Dam. Sturgeon have been known to grow upwards of 20 feet (6.1 meters) and can live in excess of 100 years and many in and around Lake Havasu continue in their efforts to catch a glimpse of the majestic animal. The California Office of Environmental Health Hazard Assessment (OEHHA) has developed a safe eating advisory for Lake Havasu based on levels of mercury found in fish caught from this water body. The Bureau of Land Management operates 73 campsites on
840-618: The successful passage of what was McFarland's intended legislation that became the CAP, "probably the state's most celebrated bipartisan achievement of the 20th century." This act provided for the US Secretary of the Interior to enter into an agreement with non-federal interests, whereby the US federal government acquired the right to 24.3 percent of the power produced at the non-federal Navajo Generating Station , Navajo Project. The agreement also includes
870-556: Was added to coat the pipes and prevent the rust from dislodging, but the return to groundwater removed the zinc orthophosphate. The solution was a US Environmental Protection Agency -funded "blended" water system, including automatically monitoring water quality throughout Tucson, and a website to report the water quality to the public without intervention by the Tucson Water Department. Hectare The hectare ( / ˈ h ɛ k t ɛər , - t ɑːr / ; SI symbol: ha )
900-457: Was shepherded through Congress by Carl Hayden . The CAP delivers Colorado River water, either directly or by exchange, into central and Southern Arizona . The project was envisioned to provide water to nearly one million acres (405,000 hectares ) of irrigated agricultural land areas in Maricopa , Pinal , and Pima counties, as well as municipal water for several Arizona communities, including
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