paragraph_text: Clara Allegra Byron (12 January 1817 – 20 April 1822) was the illegitimate daughter of the poet George Gordon, Lord Byron and Claire Clairmont.

paragraph_text: Eau Claire County is included in the Eau Claire, WI Metropolitan Statistical Area as well as the Eau Claire-Menomonie WI Combined Statistical Area.

paragraph_text: Mary Shelley was born Mary Wollstonecraft Godwin in Somers Town, London, in 1797. She was the second child of the feminist philosopher, educator, and writer Mary Wollstonecraft, and the first child of the philosopher, novelist, and journalist William Godwin. Wollstonecraft died of puerperal fever shortly after Mary was born. Godwin was left to bring up Mary, along with her older half-sister, Fanny Imlay, Wollstonecraft's child by the American speculator Gilbert Imlay. A year after Wollstonecraft's death, Godwin published his "Memoirs of the Author of A Vindication of the Rights of Woman" (1798), which he intended as a sincere and compassionate tribute. However, because the "Memoirs" revealed Wollstonecraft's affairs and her illegitimate child, they were seen as shocking. Mary Godwin read these memoirs and her mother's books, and was brought up to cherish her mother's memory.

paragraph_text: Under Governor Miguel Ahumada, the education system in the state was unified and brought under tighter control by the state government, and the metric system was standardized throughout the state to replace the colonial system of weights and measures. On September 16, 1897, the Civilian Hospital of Chihuahua was inaugurated in Chihuahua City and became known among the best in the country. In 1901 the Heroes Theater (Teatro de los Héroes) opened in Chihuahua City. On August 18, 1904, Governor Terrazas was replaced by Governor Enrique C. Creel. From 1907 to 1911, the Creel administration succeeded in advancing the state's legal system, modernizing the mining industry, and raising public education standards. In 1908 the Chihuahuan State Penitentiary was built, and the construction on the first large scale dam project was initiated on the Chuviscar River. During the same time, the streets of Chihuahua City were paved and numerous monuments were built in Chihuahua City and Ciudad Juárez.

paragraph_text: The University of Wisconsin–Eau Claire (also known as UW–Eau Claire, UWEC or simply Eau Claire) is a public liberal arts university located in Eau Claire, Wisconsin, United States. Part of the University of Wisconsin System, it offers bachelor's and master's degrees and is categorized as a postbaccalaureate comprehensive institution in the Carnegie Classification of Institutions of Higher Education. UW–Eau Claire had an annual budget of approximately 237 million dollars in the 2017–18 academic year.

paragraph_text: Tenochtitlan was founded on an islet in the western part of the lake in the year 1325. Around it, the Aztecs created a large artificial island using a system similar to the creation of chinampas. To overcome the problems of drinking water, the Aztecs built a system of dams to separate the salty waters of the lake from the rain water of the effluents. It also permitted them to control the level of the lake. The city also had an inner system of channels that helped to control the water.

paragraph_text: Not long after the baby was born, Claire and Alex Ryan begin a relationship, with Alex planning to propose to her during a party. Claire, Tess, and baby Charlotte are returning from town with party supplies when their Ute hit a pothole and Claire loses control of the vehicle, and coming to a stop with its front wheels dangling off the edge of a cliff. Tess is able to get out and get Charlotte to safety, but can not get Claire's door open before the Ute starts to slide. It goes over the cliff and into a canyon, killing Claire.

paragraph_text: Ryaverket is a large sewage treatment plant in Gothenburg, Sweden. The plant is located in southern Hisingen and treats wastewater from 666,000 people in the Gothenburg region (2011).

paragraph_text: The wastewater treatment plant and distribution system of water mains, pumping stations and storage facilities provide water to approximately 62,000 customers in the city. There is also a wastewater treatment plant located on the south bank of the James River. This plant can treat up to 70 million gallons of water per day of sanitary sewage and stormwater before returning it to the river. The wastewater utility also operates and maintains 1,500 miles (2,400 km) of sanitary sewer and pumping stations, 38 miles (61 km) of intercepting sewer lines, and the Shockoe Retention Basin, a 44-million-gallon stormwater reservoir used during heavy rains.

paragraph_text: Joseph Bazalgette, a civil engineer and Chief Engineer of the Metropolitan Board of Works, was given responsibility for the work. He designed an extensive underground sewerage system that diverted waste to the Thames Estuary, downstream of the main centre of population. Six main interceptor sewers, totalling almost 160 km (100 miles) in length, were constructed, some incorporating stretches of London's ``lost ''rivers. Three of these sewers were north of the river, the southernmost, low - level one being incorporated in the Thames Embankment. The Embankment also allowed new roads, new public gardens, and the Circle line of the London Underground. Victoria Embankment was finally officially opened on 13 July 1870.

paragraph_text: Valois is a neighbourhood in the city of Pointe-Claire, Quebec, Canada. It was once a separate village, many years ago, but was then merged with Pointe-Claire in 1911.

paragraph_text: Newtown Creek, a 3.5-mile (6-kilometer) a long estuary that forms part of the border between the boroughs of Brooklyn and Queens, has been designated a Superfund site for environmental clean-up and remediation of the waterway's recreational and economic resources for many communities. One of the most heavily used bodies of water in the Port of New York and New Jersey, it had been one of the most contaminated industrial sites in the country, containing years of discarded toxins, an estimated 30 million US gallons (110,000 m3) of spilled oil, including the Greenpoint oil spill, raw sewage from New York City's sewer system, and other accumulation.

paragraph_text: Aimata Dam (相俣ダム) is a dam built on the Akaya River, part of the class-A Tonegawa River system at Aimata in the city of Minami (the former village of Nīharimura), in the Tone District of Gunma Prefecture, Japan.

paragraph_text: Kievan Rus', although sparsely populated compared to Western Europe, was not only the largest contemporary European state in terms of area but also culturally advanced. Literacy in Kiev, Novgorod and other large cities was high. As birch bark documents attest, they exchanged love letters and prepared cheat sheets for schools. Novgorod had a sewage system and wood paving not often found in other cities at the time. The Russkaya Pravda confined punishments to fines and generally did not use capital punishment. Certain rights were accorded to women, such as property and inheritance rights.

paragraph_text: The Dnipro Metro (; ) is a single-line rapid transit system that serves the city of Dnipro, the fourth largest city in Ukraine by population. The metro was the third system constructed in Ukraine, after the Kiev and Kharkiv metro systems, respectively, when it opened on December 29, 1995. The metro was the fourteenth built in the former Soviet Union region, and the first to open after the collapse of the Soviet Union in 1991.

paragraph_text: Guangzhou Metro is the metro system that serves the city of Guangzhou in Guangdong Province of the People's Republic of China. It is operated by the state-owned Guangzhou Metro Corporation and was the fourth metro system to be built in mainland China. Having delivered 1.99 billion rides in 2013, it is one of the busiest metro systems in the world.

paragraph_text: Clara Mary Jane Clairmont (27 April 1798 – 19 March 1879), or Claire Clairmont as she was commonly known, was the stepsister of writer Mary Shelley and the mother of Lord Byron's daughter Allegra. She is thought to be the subject of a poem by Percy Bysshe Shelley.

paragraph_text: Waste management including sewage treatment, the linked processes of deforestation and soil degradation, and climate change or global warming are the major environmental problems in Nigeria. Waste management presents problems in a mega city like Lagos and other major Nigerian cities which are linked with economic development, population growth and the inability of municipal councils to manage the resulting rise in industrial and domestic waste. This huge waste management problem is also attributable to unsustainable environmental management lifestyles of Kubwa Community in the Federal Capital Territory, where there are habits of indiscriminate disposal of waste, dumping of waste along or into the canals, sewerage systems that are channels for water flows, etc.

paragraph_text: Claire Vaive (born March 6, 1940 in Hull, Quebec) was a politician in Quebec, Canada. She was the member of National Assembly of Quebec from 1994 to 1998 and was a councillor for Gatineau City Council for 14 years.

paragraph_text: Philadelphia has dedicated landmarks to its sister cities. Dedicated in June 1976, the Sister Cities Plaza, a site of 0.5 acres (2,000 m2) located at 18th and Benjamin Franklin Parkway, honors Philadelphia's relationships with Tel Aviv and Florence which were its first sister cities. Another landmark, the Toruń Triangle, honoring the sister city relationship with Toruń, Poland, was constructed in 1976, west of the United Way building at 18th Street and the Benjamin Franklin Parkway. In addition, the Triangle contains the Copernicus monument. Renovations were made to Sister Cities Park in mid-2011 and on May 10, 2012, SCP was reopened and currently features an interactive fountain honoring Philadelphia's ten sister and friendship cities, a café and visitor's center, children's play area, outdoor garden, and boat pond, as well as pavilion built to environmentally friendly standards.

Question: when was the sewage system built in the city that Claire Clairmont's sister is from?
Answer: officially opened on 13 July 1870