99-703: Magat Dam is a large rock-fill dam in the island of Luzon in the Philippines . The dam is located along the Magat River , a major tributary of the Cagayan River . The construction of the dam started in 1975 and was completed in 1982. It is one of the largest dams in the Philippines. It is a multi-purpose dam which is used primarily for irrigating about 85,000 hectares (210,000 acres) of agricultural lands, flood control , and power generation through
198-439: A US$ 150M loan to finance the foreign exchange requirement. In addition, a US$ 9M loan from Bahrain was obtained for the purchase of other equipment for the diversion tunnel, soil laboratory and model testing. The total project cost is US$ 3.4B (yr. 1975). The dam was constructed to last for 50 years but increased siltation and sedimentation in the reservoir, slash-and-burn farming, illegal logging and fish-caging resulted in
297-401: A balancing compression stress in the downstream face, providing additional economy. For this type of dam, it is essential to have an impervious foundation with high bearing strength. Permeable foundations have a greater likelihood of generating uplift pressures under the dam. Uplift pressures are hydrostatic pressures caused by the water pressure of the reservoir pushing up against the bottom of
396-761: A big portion of its north-eastern territory, including Camarag, its first capital, now Echague , to form the province of Isabela in May 1856. In 1908, the northwestern territory of Nueva Vizcaya was annexed to the newly organized sub-province of Ifugao . The survey executed by the Bureau of Lands in 1914 further caused the diminution of its area and reduced again upon the enactment of the Administrative Code of 1917. North areas of present-day Aurora (composed of present towns of Dilasag & part of Casiguran ) were annexed to Tayabas (now Quezon) in 1905. In 1918,
495-544: A dam as "jurisdictional" or "non-jurisdictional" varies by location. In the United States, each state defines what constitutes a non-jurisdictional dam. In the state of Colorado a non-jurisdictional dam is defined as a dam creating a reservoir with a capacity of 100 acre-feet or less and a surface area of 20 acres or less and with a height measured as defined in Rules 4.2.5.1. and 4.2.19 of 10 feet or less. In contrast,
594-499: A dam that directed waterflow. It was finished in 251 BC. A large earthen dam, made by Sunshu Ao , the prime minister of Chu (state) , flooded a valley in modern-day northern Anhui Province that created an enormous irrigation reservoir (100 km (62 mi) in circumference), a reservoir that is still present today. Roman dam construction was characterized by "the Romans' ability to plan and organize engineering construction on
693-493: A distinct vertical curvature to it as well lending it the vague appearance of a concave lens as viewed from downstream. The multiple-arch dam consists of a number of single-arch dams with concrete buttresses as the supporting abutments, as for example the Daniel-Johnson Dam , Québec, Canada. The multiple-arch dam does not require as many buttresses as the hollow gravity type but requires a good rock foundation because
792-554: A few residents speak Ibanag , which was the lingua franca of Provincia de Cagayan before it was replaced by Ilokano. Poverty incidence of Nueva Vizcaya Source: Philippine Statistics Authority Agriculture is the main industry in the province, together with rice, corn, fruits and vegetables as major crops. Nueva Vizcaya is a major producer of citrus crops in the country, principally pomelo, ponkan and oranges. The Nueva Vizcaya Agricultural Terminal in Bambang supplies
891-478: A grand scale." Roman planners introduced the then-novel concept of large reservoir dams which could secure a permanent water supply for urban settlements over the dry season. Their pioneering use of water-proof hydraulic mortar and particularly Roman concrete allowed for much larger dam structures than previously built, such as the Lake Homs Dam , possibly the largest water barrier to that date, and
990-473: A joint venture of a local company, Aboitiz Power Corporation (AP), and a Norwegian firm SN Power in April 2007. SNAP won the bidding in 2006. The dam is located within the boundaries of Namillangan, Alfonso Lista , Ifugao and Ramon , Isabela , approximately 350 kilometres (220 mi) north of Metro Manila . The Magat Dam is on the Magat River , which is the largest tributary of the Cagayan River on
1089-663: A large portion of Isabela , as well as north Aurora . After Nueva Vizcaya was created, it included the present area occupied by the province plus present-day Mountain Province , much of Isabela, Quirino, & north Aurora. Civil government was established in the province by the Philippine Commission in 1902 during the American Colonial Period of the Philippines . The territories of Nueva Vizcaya were greatly reduced when Nueva Vizcaya ceded
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#17327809459581188-511: A minor tributary of the Nieuwe Maas . The central square of Amsterdam, covering the original site of the 800-year-old dam, still carries the name Dam Square . The Romans were the first to build arch dams , where the reaction forces from the abutment stabilizes the structure from the external hydrostatic pressure , but it was only in the 19th century that the engineering skills and construction materials available were capable of building
1287-509: A notable increase in interest in SHPs. Couto and Olden (2018) conducted a global study and found 82,891 small hydropower plants (SHPs) operating or under construction. Technical definitions of SHPs, such as their maximum generation capacity, dam height, reservoir area, etc., vary by country. A dam is non-jurisdictional when its size (usually "small") excludes it from being subject to certain legal regulations. The technical criteria for categorising
1386-649: A profession based on a rigorously applied scientific theoretical framework. This new emphasis was centered around the engineering faculties of universities in France and in the United Kingdom. William John Macquorn Rankine at the University of Glasgow pioneered the theoretical understanding of dam structures in his 1857 paper On the Stability of Loose Earth . Rankine theory provided a good understanding of
1485-706: A religious order was established in the southern half of the province. In 1702, a convent was erected in Burubur at the foot of the Caraballo Mountains in Santa Clara, which is now a barangay in the town of Aritao . It was on this site that the first mass in Nueva Vizcaya was celebrated and the first baptism of a Christian convert was held. Spanish conquest of Nueva Vizcaya was slow and arduous. Expeditions had to be sent again and again because
1584-566: A settling pond, and a 1,000 m (3,300 ft) canal to a distribution tank. These works were not finished until 325 AD when the dam permitted the irrigation of 25,000 acres (100 km ). Eflatun Pınar is a Hittite dam and spring temple near Konya , Turkey. It is thought to date from the Hittite empire between the 15th and 13th centuries BC. The Kallanai is constructed of unhewn stone, over 300 m (980 ft) long, 4.5 m (15 ft) high and 20 m (66 ft) wide, across
1683-521: A total of 275 barangays , with Roxas in Solano, Nueva Vizcaya as the most populous in 2010, and Santa Rosa in Santa Fe, Nueva Vizcaya as the least. The population of Nueva Vizcaya in the 2020 census was 497,432 people, with a density of 130 inhabitants per square kilometre or 340 inhabitants per square mile. Nueva Vizcaya is home to about 18 indigenous peoples, which includes the major tribes of
1782-582: A week-long affair culminating on May 24, the province's foundation day. Since Nueva Vizcaya's birth as a province, traces of the culture and customs of its early settlers—the Igorots [ Ilongots (Bugkalot), Ifugaos , Isinais, Kalanguya], Gaddangs , and the Pangasinans —can still be seen. The influx of civilization and the infusion of modern technology to the life stream of the province induced immigration from adjacent provinces. The province
1881-408: A whole dam itself, that dam also would be held in place by gravity, i.e., there is no tension in the upstream face of the dam holding the top of the dam down. The designer does this because it is usually more practical to make a dam of material essentially just piled up than to make the material stick together against vertical tension. The shape that prevents tension in the upstream face also eliminates
1980-523: Is Bayombong . It is bordered by Benguet to the west, Ifugao to the north, Isabela to the northeast, Quirino to the east, Aurora to the southeast, Nueva Ecija to the south, and Pangasinan to the southwest. Quirino province was created from Nueva Vizcaya in 1966. The name Nueva Vizcaya is derived from the name of the province of Biscay (called Vizcaya in Spanish, Bizkaia in Basque) during
2079-474: Is a barrier that stops or restricts the flow of surface water or underground streams. Reservoirs created by dams not only suppress floods but also provide water for activities such as irrigation , human consumption , industrial use , aquaculture , and navigability . Hydropower is often used in conjunction with dams to generate electricity. A dam can also be used to collect or store water which can be evenly distributed between locations. Dams generally serve
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#17327809459582178-461: Is a four-unit powerhouse with an installed capacity of 360 megawatts . It is designed to accommodate two more units that will allow it to generate up to 540 megawatts. The hydroelectric plant is a peaking power plant , which means that it only operates when there is a high demand for electricity in the Luzon power grid, to which the plant is connected. It is capable of providing ancillary services for
2277-424: Is dependent on the strength of the side wall abutments, hence not only should the arch be well seated on the side walls but also the character of the rock should be carefully inspected. Two types of single-arch dams are in use, namely the constant-angle and the constant-radius dam. The constant-radius type employs the same face radius at all elevations of the dam, which means that as the channel grows narrower towards
2376-748: Is generally mountainous, varying from steep mountains to rolling hills, with some valleys and plains. It is bordered on the west by the Cordillera mountains , on the east by the Sierra Madre mountains , and on the south by the Caraballo Mountains . The province (and the entire Cagayan Valley) are separated from the Central Luzon plains by the Caraballo Mountains. The province has a total land area of 3,975.67 square kilometres (1,535.01 sq mi). The southernmost province in
2475-474: Is now the Philippines' tilapia capital ( Saint Peter 's fish). Production supply grew 37.25% since 2003, with 14,000 metric tons (MT) in 2007. The recent aquaculture congress found that the growth of tilapia production was due to government interventions: provision of fast-growing species, accreditation of private hatcheries to ensure supply of quality fingerlings, establishment of demonstration farms, providing free fingerlings to newly constructed fishponds, and
2574-471: Is sloped the distribution is more complicated. The normal component of the weight of the arch ring may be taken by the arch action, while the normal hydrostatic pressure will be distributed as described above. For this type of dam, firm reliable supports at the abutments (either buttress or canyon side wall) are more important. The most desirable place for an arch dam is a narrow canyon with steep side walls composed of sound rock. The safety of an arch dam
2673-399: Is the more widely used of the two, though the hollow dam is frequently more economical to construct. Grand Coulee Dam is a solid gravity dam and Braddock Locks & Dam is a hollow gravity dam. A gravity dam can be combined with an arch dam into an arch-gravity dam for areas with massive amounts of water flow but less material available for a pure gravity dam. The inward compression of
2772-590: Is the thinnest arch dam in the world and one of the oldest arch dams in Asia. It was constructed some 700 years ago in Tabas county , South Khorasan Province , Iran . It stands 60 meters tall, and in crest is a one meter width. Some historians believe the dam was built by Shāh Abbās I, whereas others believe that he repaired it. In the Netherlands , a low-lying country, dams were often built to block rivers to regulate
2871-566: The Cagayan Valley region, Nueva Vizcaya lies approximately 268 kilometres (167 mi) north of Metro Manila and can be reached by land via the Cagayan Valley Road ( Maharlika Highway ). Nueva Vizcaya comprises 15 municipalities , with Bayombong as the provincial capital and major educational center, Bambang (the agricultural hub) and Solano (the financial district) as the major commercial centers, and Kayapa as
2970-657: The Fayum Depression to the Nile in Middle Egypt. Two dams called Ha-Uar running east–west were built to retain water during the annual flood and then release it to surrounding lands. The lake called Mer-wer or Lake Moeris covered 1,700 km (660 sq mi) and is known today as Birket Qarun. By the mid-late third millennium BC, an intricate water-management system in Dholavira in modern-day India
3069-579: The Harbaqa Dam , both in Roman Syria . The highest Roman dam was the Subiaco Dam near Rome ; its record height of 50 m (160 ft) remained unsurpassed until its accidental destruction in 1305. Roman engineers made routine use of ancient standard designs like embankment dams and masonry gravity dams. Apart from that, they displayed a high degree of inventiveness, introducing most of
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3168-534: The Ifugao ( Quezon , Bagabag , Kasibu ) , Gaddang ( Solano and Bayombong ) , Isinai ( Dupax del Sur and Bambang ) , Dumagat ( Aritao ) , Kalanguya ( Santa Fe ) , and the Bugkalot ( Alfonso Castañeda and Dupax del Norte ) . Indigenous peoples' groups have filed for ancestral domain titles covering parts of the province. The Ilokano population in the province are not indigenous as they were part of
3267-641: The National Inventory of Dams (NID). Nueva Vizcaya Nueva Vizcaya , officially the Province of Nueva Vizcaya ( Ilocano : Probinsia ti Nueva Vizcaya ; Gaddang : Provinsia na Nueva Vizcaya ; Pangasinan : Luyag/Probinsia na Nueva Vizcaya ; Tagalog : Lalawigan ng Nueva Vizcaya [ˈnwɛva vɪsˈkaja] ), is a landlocked province in the Philippines located in the Cagayan Valley region in Luzon . Its capital and largest town
3366-715: The National Irrigation Administration (NIA). The hydroelectric plant was formerly owned by the National Power Corporation (NAPOCOR). Under the Electric Power Industry Reform Act of 2001 ( Republic Act No. 9136), the Magat hydroelectric power plant underwent a privatization process. As a result, the plant's ownership and operation was turned over to SN Aboitiz Power-Magat, Inc. (SNAP-Magat),
3465-575: The Spanish colonial period . This can be seen in the right part of the seal, a representation of the heraldic of Vizcaya in Spain. The areas of present-day Nueva Vizcaya used to be part of the vast Provincia de Cagayan . Organized religion in Nueva Vizcaya dates back to the year 1607, when the Dominican Order arrived in the province. It was not until 1609, however, that the first settlement of
3564-645: The University of Oxford published a study of the cost of large dams – based on the largest existing dataset – documenting significant cost overruns for a majority of dams and questioning whether benefits typically offset costs for such dams. Dams can be formed by human agency, natural causes, or even by the intervention of wildlife such as beavers . Man-made dams are typically classified according to their size (height), intended purpose or structure. Based on structure and material used, dams are classified as easily created without materials, arch-gravity dams , embankment dams or masonry dams , with several subtypes. In
3663-564: The 15th and 13th centuries BC. The Kallanai Dam in South India, built in the 2nd century AD, is one of the oldest water regulating structures still in use. Roman engineers built dams with advanced techniques and materials, such as hydraulic mortar and Roman concrete, which allowed for larger structures. They introduced reservoir dams, arch-gravity dams, arch dams, buttress dams, and multiple arch buttress dams. In Iran, bridge dams were used for hydropower and water-raising mechanisms. During
3762-544: The British began construction in 1898. The project was designed by Sir William Willcocks and involved several eminent engineers of the time, including Sir Benjamin Baker and Sir John Aird , whose firm, John Aird & Co. , was the main contractor. Capital and financing were furnished by Ernest Cassel . When initially constructed between 1899 and 1902, nothing of its scale had ever before been attempted; on completion, it
3861-520: The Colorado River is a constant-angle arch dam. A similar type is the double-curvature or thin-shell dam. Wildhorse Dam near Mountain City, Nevada , in the United States is an example of the type. This method of construction minimizes the amount of concrete necessary for construction but transmits large loads to the foundation and abutments. The appearance is similar to a single-arch dam but with
3960-680: The Colorado River. By 1997, there were an estimated 800,000 dams worldwide, with some 40,000 of them over 15 meters high. Early dam building took place in Mesopotamia and the Middle East . Dams were used to control water levels, for Mesopotamia's weather affected the Tigris and Euphrates Rivers. The earliest known dam is the Jawa Dam in Jordan , 100 kilometres (62 mi) northeast of
4059-552: The Cordillera region. Tagalogs live along the border of Nueva Ecija & in the capital, Bayombong. Roman Catholics are about 63% of the population of the province. Other faiths are divided among Aglipayan Church , Iglesia ni Cristo which form about 5-6% of the province population, The Church of Jesus Christ of Latter-day Saints , Jehovah's Witnesses , Baptist , Methodist, Pentecostals, Seventh-day Adventist and other Evangelical Christians which forms about 17%-20% of
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4158-544: The Magat Hydroelectric Power Plant. The water stored in the reservoir is enough to supply about two months of normal energy requirements. The construction and appurtenant structures were authorized by Presidential Decree No/ 693 signed on May 7, 1975, by then President Ferdinand E. Marcos . The Magat Dam was constructed in 1978, inaugurated by Marcos on October 27, 1982, and started operations in 1983. Implementation of this multipurpose project
4257-714: The Middle Ages, dams were built in the Netherlands to regulate water levels and prevent sea intrusion. In the 19th century, large-scale arch dams were constructed around the British Empire, marking advances in dam engineering techniques. The era of large dams began with the construction of the Aswan Low Dam in Egypt in 1902. The Hoover Dam, a massive concrete arch-gravity dam, was built between 1931 and 1936 on
4356-610: The Middle East for water control. The earliest known dam is the Jawa Dam in Jordan , dating to 3,000 BC. Egyptians also built dams, such as Sadd-el-Kafara Dam for flood control. In modern-day India, Dholavira had an intricate water-management system with 16 reservoirs and dams. The Great Dam of Marib in Yemen, built between 1750 and 1700 BC, was an engineering wonder, and Eflatun Pinar, a Hittite dam and spring temple in Turkey, dates to
4455-592: The Philippines as Typhoon Ulysses) crossed the country, dams from all around Luzon neared their spilling points, forcing them to release large amounts of water into their impounds including Magat Dam. The dam opened all of its 7 gates at 24 metres (79 ft), releasing over 5,037 cubic metres (1,331,000 US gal) of water into the Cagayan River flooding numerous riverside towns. Waters under the Buntun Bridge went up as high as 13 metres (43 ft), flooding
4554-495: The United States alone, there are approximately 2,000,000 or more "small" dams that are not included in the Army Corps of Engineers National Inventory of dams . Records of small dams are kept by state regulatory agencies and therefore information about small dams is dispersed and uneven in geographic coverage. Countries worldwide consider small hydropower plants (SHPs) important for their energy strategies, and there has been
4653-524: The World Commission on Dams also includes in the "large" category, dams which are between 5 and 15 m (16 and 49 ft) high with a reservoir capacity of more than 3 million cubic metres (2,400 acre⋅ft ). Hydropower dams can be classified as either "high-head" (greater than 30 m in height) or "low-head" (less than 30 m in height). As of 2021 , ICOLD's World Register of Dams contains 58,700 large dam records. The tallest dam in
4752-450: The advice of the alcalde mayor of Cagayan, Luis Lardizabal , then- Governor General of the Philippines created the politico-military province of Nueva Vizcaya. The order was approved by a Royal Decree on April 10, 1841. The name Nueva Vizcaya was named after Biscay, Spain, the hometown of Lardizabal. The original province covered the areas of present-day Nueva Vizcaya, Quirino , Ifugao , Apayao , Kalinga , and Benguet , Batanes ,
4851-403: The arch dam, stability is obtained by a combination of arch and gravity action. If the upstream face is vertical the entire weight of the dam must be carried to the foundation by gravity, while the distribution of the normal hydrostatic pressure between vertical cantilever and arch action will depend upon the stiffness of the dam in a vertical and horizontal direction. When the upstream face
4950-699: The area of modern Aurora north of Baler (composed of Dinalungan , Dipaculao , & Maria Aurora , besides Casiguran & Dilasag) was transferred to the authority of Nueva Vizcaya, but returned to Quezon Province in 1946. The province of Nueva Vizcaya was also included in the 12th district of the Philippine Senate during the American period. The district included Mountain Province (present-day Apayao, Kalinga, Mountain Province, and Benguet), Cotabato (undivided), Agusan (undivided), Davao (undivided), Zamboanga (undivided), and Sulu (undivided). The province
5049-666: The back of the dam through a large pipe to drive a water wheel and watermill . In the 10th century, Al-Muqaddasi described several dams in Persia. He reported that one in Ahwaz was more than 910 m (3,000 ft) long, and that it had many water-wheels raising the water into aqueducts through which it flowed into reservoirs of the city. Another one, the Band-i-Amir Dam, provided irrigation for 300 villages. Shāh Abbās Arch (Persian: طاق شاه عباس), also known as Kurit Dam ,
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#17327809459585148-491: The bottom of the dam the central angle subtended by the face of the dam becomes smaller. Jones Falls Dam , in Canada, is a constant radius dam. In a constant-angle dam, also known as a variable radius dam, this subtended angle is kept constant and the variation in distance between the abutments at various levels is taken care of by varying the radii. Constant-radius dams are much less common than constant-angle dams. Parker Dam on
5247-402: The buttress loads are heavy. In a gravity dam, the force that holds the dam in place against the push from the water is Earth's gravity pulling down on the mass of the dam. The water presses laterally (downstream) on the dam, tending to overturn the dam by rotating about its toe (a point at the bottom downstream side of the dam). The dam's weight counteracts that force, tending to rotate the dam
5346-501: The capital Amman . This gravity dam featured an originally 9-metre-high (30 ft) and 1 m-wide (3.3 ft) stone wall, supported by a 50 m-wide (160 ft) earthen rampart. The structure is dated to 3000 BC. However, the oldest continuously operational dam is Lake Homs Dam , built in Syria between 1319-1304 BC. The Ancient Egyptian Sadd-el-Kafara Dam at Wadi Al-Garawi, about 25 km (16 mi) south of Cairo ,
5445-646: The city. The masonry arch dam wall was designed by Lieutenant Percy Simpson who was influenced by the advances in dam engineering techniques made by the Royal Engineers in India . The dam cost £17,000 and was completed in 1856 as the first engineered dam built in Australia, and the second arch dam in the world built to mathematical specifications. The first such dam was opened two years earlier in France . It
5544-559: The coastal regions of Pangasinan and Ilocos. So, it was deliberated in the Spanish Congress the need for in migration of labor. After it was voted by a majority and approved by the king, Ilocanos started to migrate and were given homestead. Thus, the start of the migration of Ilocanos in the province. Every last week of May, these ethnolinguistic groups gather to celebrate the Ammungan festival (formerly Panagyaman festival),
5643-433: The construction of the Rideau Canal in Canada near modern-day Ottawa and built a series of curved masonry dams as part of the waterway system. In particular, the Jones Falls Dam , built by John Redpath , was completed in 1832 as the largest dam in North America and an engineering marvel. In order to keep the water in control during construction, two sluices , artificial channels for conducting water, were kept open in
5742-469: The dam by the water reduces the lateral (horizontal) force acting on the dam. Thus, the gravitational force required by the dam is lessened, i.e., the dam does not need to be so massive. This enables thinner dams and saves resources. A barrage dam is a special kind of dam that consists of a line of large gates that can be opened or closed to control the amount of water passing the dam. The gates are set between flanking piers which are responsible for supporting
5841-533: The dam was submitted by a consortium called Six Companies, Inc. Such a large concrete structure had never been built before, and some of the techniques were unproven. The torrid summer weather and the lack of facilities near the site also presented difficulties. Nevertheless, Six Companies turned over the dam to the federal government on 1 March 1936, more than two years ahead of schedule. By 1997, there were an estimated 800,000 dams worldwide, some 40,000 of them over 15 m (49 ft) high. In 2014, scholars from
5940-605: The dam. If large enough uplift pressures are generated there is a risk of destabilizing the concrete gravity dam. On a suitable site, a gravity dam can prove to be a better alternative to other types of dams. When built on a solid foundation, the gravity dam probably represents the best-developed example of dam building. Since the fear of flood is a strong motivator in many regions, gravity dams are built in some instances where an arch dam would have been more economical. Gravity dams are classified as "solid" or "hollow" and are generally made of either concrete or masonry. The solid form
6039-407: The dam. The first was near the base of the dam on its east side. A second sluice was put in on the west side of the dam, about 20 ft (6.1 m) above the base. To make the switch from the lower to upper sluice, the outlet of Sand Lake was blocked off. Hunts Creek near the city of Parramatta , Australia , was dammed in the 1850s, to cater to the demand for water from the growing population of
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#17327809459586138-450: The dams' potential range and magnitude of environmental disturbances. The International Commission on Large Dams (ICOLD) defines a "large dam" as "A dam with a height of 15 m (49 ft) or greater from lowest foundation to crest or a dam between 5 m (16 ft) metres and 15 metres impounding more than 3 million cubic metres (2,400 acre⋅ft )". "Major dams" are over 150 m (490 ft) in height. The Report of
6237-454: The demand of neighboring provinces and Metro Manila. There is a mining industry in the province such as the Didipio mine in the municipality of Kasibu, which added to the provincial income. However, mining activities have also been alleged to have dried up water sources, polluted the environment, and endangered livelihoods of farmers and fisherfolk. According to the Mines and Geosciences Bureau , deposits of metallic minerals discovered in
6336-437: The deterioration of the dam's watershed. The 1990 Luzon earthquake also contributed to the increased siltation in the Magat River system. Because of this, in January 2006, then President Gloria Macapagal Arroyo instructed various government agencies to create a rehabilitation plan to improve the lifespan of the dam system. The non-power components such as the dam, reservoir, and intake gates are owned, operated, and managed by
6435-410: The dissemination of tilapia to Nueva Vizcaya (in Diadi town). Nueva Vizcaya has one congressional district , although there has been a longtime proposal to divide the province into two congressional districts. Every May, the province holds the Ammungan Festival , a five-day festival in celebration for its founding anniversary. The word "Ammungan" is a Gaddang word meaning "gathering" symbolizing
6534-443: The first large-scale arch dams. Three pioneering arch dams were built around the British Empire in the early 19th century. Henry Russel of the Royal Engineers oversaw the construction of the Mir Alam dam in 1804 to supply water to the city of Hyderabad (it is still in use today). It had a height of 12 m (39 ft) and consisted of 21 arches of variable span. In the 1820s and 30s, Lieutenant-Colonel John By supervised
6633-402: The first was the Roman-built dam bridge in Dezful , which could raise water 50 cubits (c. 23 m) to supply the town. Also diversion dams were known. Milling dams were introduced which the Muslim engineers called the Pul-i-Bulaiti . The first was built at Shustar on the River Karun , Iran, and many of these were later built in other parts of the Islamic world . Water was conducted from
6732-534: The force of water. A fixed-crest dam is a concrete barrier across a river. Fixed-crest dams are designed to maintain depth in the channel for navigation. They pose risks to boaters who may travel over them, as they are hard to spot from the water and create induced currents that are difficult to escape. There is variability, both worldwide and within individual countries, such as in the United States, in how dams of different sizes are categorized. Dam size influences construction, repair, and removal costs and affects
6831-545: The island of Luzon . Cagayan is the longest river in the Philippines. The Magat River has an estimated yearly water discharge of 9,808 million cubic metres and has an approximate crest length of 4,160 metres (13,650 ft) with its headwaters in the province of Nueva Vizcaya and its confluence with the Cagayan River in the province of Isabela . It is connected by an all-weather road to San Mateo–Santiago Road at Oscariz, Ramon, Isabela some 350 kilometres (220 mi) north of Metro Manila. The Magat hydroelectric power plant
6930-400: The labor force initially needed by the Spanish administration to work on the tobacco plantations beginning in the 1700s, and later immigrants with skills construct churches and other structures needed for development. Indigenous tribes were not cooperative with the Spaniards. After several insurrections by the locals, Spanish officials chose to import trained labor from established settlements in
7029-414: The later part of the Spanish regime, people from Ilocos region migrated to the province through the recommendation of Spanish officials in the province. It was deliberated in the Spanish court in Spain and with a majority vote and approval of the king of Spain, Ilocanos were allowed to migrate to the province. Thus, the importation of the Ilokano language and culture started, becoming the lingua franca of
7128-645: The main stream of the Kaveri River in Tamil Nadu , South India . The basic structure dates to the 2nd century AD and is considered one of the oldest water diversion or water regulating structures still in use. The purpose of the dam was to divert the waters of the Kaveri across the fertile delta region for irrigation via canals. Du Jiang Yan is the oldest surviving irrigation system in China that included
7227-571: The natives refused to accept Spanish sovereignty. In some of these expeditions, services of some Filipino chieftains were utilized. The most famous of these expeditions was that commanded by Mariano Oscariz, in 1847–1848, which carried him clear through the province across to Palanan on the eastern coast of Luzon. In 1818, Nueva Ecija annexed the towns of Palanan from Isabela , as well as Cagayan, Nueva Vizcaya, Quirino, Baler, Casiguran, Infanta (formerly called Binangonan de Lampon) and Polillo Islands from Tayabas, and part of Rizal. In 1839, upon
7326-641: The nearby barangays up to the roofs of houses. Prior to the flooding, the National Irrigation Administration (NIA) said Sunday it had already warned residents of Cagayan and Isabela of Magat Dam's water release two days prior to Typhoon Ulysses' landfall on November 11. As a result of the catastrophe, the NIA said that it will review its protocols regarding the release of water in Magat Dam and improve its watershed. Dam A dam
7425-683: The other basic dam designs which had been unknown until then. These include arch-gravity dams , arch dams , buttress dams and multiple arch buttress dams , all of which were known and employed by the 2nd century AD (see List of Roman dams ). Roman workforces also were the first to build dam bridges, such as the Bridge of Valerian in Iran. In Iran , bridge dams such as the Band-e Kaisar were used to provide hydropower through water wheels , which often powered water-raising mechanisms. One of
7524-429: The other way about its toe. The designer ensures that the dam is heavy enough that the dam's weight wins that contest. In engineering terms, that is true whenever the resultant of the forces of gravity acting on the dam and water pressure on the dam acts in a line that passes upstream of the toe of the dam. The designer tries to shape the dam so if one were to consider the part of the dam above any particular height to be
7623-469: The primary purpose of retaining water, while other structures such as floodgates or levees (also known as dikes ) are used to manage or prevent water flow into specific land regions. The word dam can be traced back to Middle English , and before that, from Middle Dutch , as seen in the names of many old cities, such as Amsterdam and Rotterdam . Ancient dams were built in Mesopotamia and
7722-607: The principles behind dam design. In France, J. Augustin Tortene de Sazilly explained the mechanics of vertically faced masonry gravity dams, and Zola's dam was the first to be built on the basis of these principles. The era of large dams was initiated with the construction of the Aswan Low Dam in Egypt in 1902, a gravity masonry buttress dam on the Nile River . Following their 1882 invasion and occupation of Egypt ,
7821-476: The province are copper , gold , molybdenum and pyrite . Non-metallic deposits include red clay, white clay and limestone, with sand and gravel being the most abundant deposits in the province. On January 11, 2008, the Cagayan Bureau of Fisheries and Aquatic Resources (BFAR) stated that tilapia ( species of cichlid fishes from the tilapiine cichlid tribe ) production grew and Cagayan Valley
7920-655: The province's population as well as Muslims and indigenous Cordilleran religions. Nueva Vizcaya province possesses one of the most diverse array of indigenous languages in Luzon , a testimony to its cultural and geographic linkages with the Cordillera mountain range. The indigenous languages of the province listed by the Komisyon ng Wikang Filipino are the Bugkalut language , Ibaloy language , Ifugaw language , Iguwak language , Irungdungan language , Isinay language , Kalanguya language , and Kankanaey language . During
8019-467: The province. Ilokano accents were affected by the native languages of the peoples whom Ilokanos intermingled with. Remarkably, the economy of the province started to grow because of the industry of the Ilocanos as well as through their innate talent in entrepreneurship and in other industries including agriculture. As Nueva Vizcaya was part of Provincia de Cagayan which is the predecessor of Cagayan Valley,
8118-462: The stability of the grid, and was augmented by a 24 MW battery in 2024. SN Aboitiz Power-Magat, Inc. completed the half-life refurbishment of the Magat Hydroelectric Power Plant in 2014. Refurbishment began in 2009 and was completed in June 2014. Half-life refurbishment ensures that the power plant facility remains available throughout its life span. In November 2020, Typhoon Vamco (locally known in
8217-487: The state of New Mexico defines a jurisdictional dam as 25 feet or greater in height and storing more than 15 acre-feet or a dam that stores 50 acre-feet or greater and is six feet or more in height (section 72-5-32 NMSA), suggesting that dams that do not meet these requirements are non-jurisdictional. Most US dams, 2.41 million of a total of 2.5 million dams, are not under the jurisdiction of any public agency (i.e., they are non-jurisdictional), nor are they listed on
8316-511: The summer capital and "vegetable bowl" of the province. All municipalities are encompassed by a lone legislative district , but are separated into two districts for purposes of representation in its provincial board. The 1st District comprises the municipalities of Ambaguio, Bagabag, Bayombong, Diadi, Quezon, Solano and Villaverde, while the 2nd District is composed of the municipalities of Alfonso Castañeda, Aritao, Bambang, Dupax del Norte, Dupax del Sur, Kayapa, Kasibu and Santa Fe. Geographically,
8415-406: The water level and to prevent the sea from entering the marshlands. Such dams often marked the beginning of a town or city because it was easy to cross the river at such a place, and often influenced Dutch place names. The present Dutch capital, Amsterdam (old name Amstelredam ), started with a dam on the river Amstel in the late 12th century, and Rotterdam began with a dam on the river Rotte ,
8514-642: The water load, and are often used to control and stabilize water flow for irrigation systems. An example of this type of dam is the now-decommissioned Red Bluff Diversion Dam on the Sacramento River near Red Bluff, California . Barrages that are built at the mouths of rivers or lagoons to prevent tidal incursions or use the tidal flow for tidal power are known as tidal barrages . Embankment dams are made of compacted earth, and are of two main types: rock-fill and earth-fill. Like concrete gravity dams, embankment dams rely on their weight to hold back
8613-710: The western half of Nueva Vizcaya is part of the main Cordilleras, while its eastern half is part of the Caraballos, the meeting point of the Cordilleras and the Sierra Madre. There have been grassroot moves to reunify Nueva Vizcaya with the Cordillera Region due to cultural and geographical harmony, however, none have been introduced in Congress. The 15 municipalities of the province comprise
8712-581: The world is the 305 m-high (1,001 ft) Jinping-I Dam in China . As with large dams, small dams have multiple uses, such as, but not limited to, hydropower production, flood protection, and water storage. Small dams can be particularly useful on farms to capture runoff for later use, for example, during the dry season. Small scale dams have the potential to generate benefits without displacing people as well, and small, decentralised hydroelectric dams can aid rural development in developing countries. In
8811-627: Was Southeast Asia 's first large multipurpose dam. The dam is part of the Magat River Multipurpose Project (MRMP) which was financed by the World Bank and whose purpose is to improve on the existing Magat River Irrigation System (MARIS) and to triple the production of rice in the Cagayan River basin. The project was jointly financed by the Philippine Government and the World Bank which extended
8910-548: Was 102 m (335 ft) long at its base and 87 m (285 ft) wide. The structure was built around 2800 or 2600 BC as a diversion dam for flood control, but was destroyed by heavy rain during construction or shortly afterwards. During the Twelfth Dynasty in the 19th century BC, the Pharaohs Senosert III, Amenemhat III , and Amenemhat IV dug a canal 16 km (9.9 mi) long linking
9009-611: Was based on the preliminary study conducted in 1973 by the National Irrigation Administration (NIA) with the assistance of the United States Bureau of Reclamation (USBR) and the United States Agency for International Development (USAID). Subsequent detailed and extensive dam site investigation and engineering studies further confirmed the feasibility of what is now known as NIA's most daring infrastructure project and one of Asia's biggest dams today. It
9108-560: Was built. The system included 16 reservoirs, dams and various channels for collecting water and storing it. One of the engineering wonders of the ancient world was the Great Dam of Marib in Yemen . Initiated sometime between 1750 and 1700 BC, it was made of packed earth – triangular in cross-section, 580 m (1,900 ft) in length and originally 4 m (13 ft) high – running between two groups of rocks on either side, to which it
9207-600: Was included in the district because of its ethnic compatibility with Mountain Province and other indigenous domains in the Cordilleras and Mindanao. During the Pacific War of the Second World War , the Japanese captured Nueva Vizcaya and established a "comfort station" in the province, where Filipino " comfort women " were enslaved, routinely gang-raped, and murdered under Japanese control. The Dalton Pass
9306-488: Was linked by substantial stonework. Repairs were carried out during various periods, most importantly around 750 BC, and 250 years later the dam height was increased to 7 m (23 ft). After the end of the Kingdom of Saba , the dam fell under the control of the Ḥimyarites (c. 115 BC) who undertook further improvements, creating a structure 14 m (46 ft) high, with five spillways, two masonry-reinforced sluices,
9405-404: Was possibly the world's first concrete arch dam. Designed by Henry Charles Stanley in 1880 with an overflow spillway and a special water outlet, it was eventually heightened to 10 m (33 ft). In the latter half of the nineteenth century, significant advances in the scientific theory of masonry dam design were made. This transformed dam design from an art based on empirical methodology to
9504-517: Was pushed to be included in the Cordillera Autonomous Region because the province is technically within the Cordillera, however, it did not came to be due to the failure to enact an autonomous Cordillera by the national government. Today, questions linger on the exclusion of Nueva Vizcaya despite the province being culturally and geographically linked to the Cordilleras. The province also has the largest Igorot population outside
9603-461: Was the first French arch dam of the industrial era , and it was built by François Zola in the municipality of Aix-en-Provence to improve the supply of water after the 1832 cholera outbreak devastated the area. After royal approval was granted in 1844, the dam was constructed over the following decade. Its construction was carried out on the basis of the mathematical results of scientific stress analysis. The 75-miles dam near Warwick , Australia,
9702-682: Was the largest masonry dam in the world. The Hoover Dam is a massive concrete arch-gravity dam , constructed in the Black Canyon of the Colorado River , on the border between the US states of Arizona and Nevada between 1931 and 1936 during the Great Depression . In 1928, Congress authorized the project to build a dam that would control floods, provide irrigation water and produce hydroelectric power . The winning bid to build
9801-599: Was the scene of a major battle between the Empire of Japan , the Commonwealth of the Philippines and American forces, with the Allies winning on May 31, 1945. In 1971, with the passage of Republic Act No. 6394 , Quirino , which was then a sub-province of Nueva Vizcaya, was separated from its mother province and made into a regular province . Surrounded by North Luzon's three large mountain ranges, Nueva Vizcaya
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