The text is from here.
Ayumi of the sewer
Last updated on July 25, 2024.
| Beginning | Two years after the opening of the port, in 1861 (1861), a gutter was built for the first time along with the maintenance of the settlement, and the drainage channel of the landfill was built with stone walls for the following two years. Since 1869, pottery pipes have been buried throughout the Kannai settlement under the design and supervision of Blanton, a British man hired by the Lighthouse Bureau, and completed in 1879. From Meiji 14 to 20 years, this was completely remodeled into a brick egg-shaped pipe. In addition, sewers in Kannai and Motomachi adjacent to Yamate Reservoir and Kannai Reservoir were also developed, and Kanagawa Prefecture enacted toilet sewage structure rules in 1882, and sewage in each house in the city should be pottery pipes in principle. Stipulated. The total sewerage extension of the settlement that was transferred to the city when the settlement was returned in 1899 was 88,247m, but other urban areas are unknown. |
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| 1937 | The city planning sewerage survey, which had been pending since 1923, was completed, but it has not been started due to the Sino-Japanese War and World War II. |
| 1950 | In the first phase of the sewerage business, we started public sewerage business with the permission of construction of the Tsurumi Ward Shiota, Heian and Market districts. Started the development of the northern treatment zone. |
| 1951 | Starting collection of sewerage usage fees due to the enforcement of sewerage regulations. |
| 1953 | Revision of sewerage usage fee. |
| 1955 | Operation of the Shiota pumping station started. |
| 1957 | For the first time, construction of a sewage system, including a wastewater treatment plant. Started maintenance of main lines and surfaces in the Chubu Processing Zone. |
| 1959 | Started operation of the market pumping station. |
| 1961 | Started the main line of the northern and southern districts. |
| 1962 | Launched a loan and subsidy program as a flush toilet remodeling and extension project. Started operation of Chubu Sewage Treatment Plant. |
| 1963 | Formulated a five-year plan (Showa 38-42) with a total project cost of 17 billion yen following the enactment of the Living Environment Facility Improvement Emergency Measures Law. Started improving the surface of the southern treatment zone. |
| 1964 | The corporate accounting method is applied to the sewerage business due to a partial revision of the Local Public Enterprise Law. Sueyoshi pumping station started operation. |
| 1965 | Started operation of the southern sewage treatment plant. Isogo pumping station started operation. |
| 1966 | Started operation of Kikuna pumping station. Started the main line of Kanagawa and Kanazawa treatment zones. |
| 1967 | Based on the Sewerage Maintenance Emergency Measures Law, the second five-year plan (Showa 42-46) was approved by the Cabinet, and the city also formulated a second five-year plan of 46.5 billion yen. Operation of the Komaoka Pumping Station started. Started the main line of the port north processing zone. |
| 1968 | Revision of sewerage usage fee-Revision of treatment area fee. Started operation of the northern first sewage treatment plant. |
| 1969 | The area has been expanded to the entire area, and the construction of sewerage in the surrounding area has been started. Started the main line of the Tozuka processing zone. |
| 1970 | Started operation of Sakuragi pumping station. Began to improve the surface of the port north treatment zone. |
| 1971 | Formulated the third five-year plan (¥ 150 billion) with FY1971 as the first year. |
| 1972 | Operation of Tozuka Sewage Treatment Plant and Kohoku Sewage Treatment Plant commenced. Started operation of Tsurumi Pumping Station and Kita-Tsunashima Pumping Station. Started improving the surface of the Tozuka processing area, the main line of the green processing area. |
| 1973 | Started operation of the wastewater treatment plant at Torihama Plant. Establishment of new sewerage regulations - start collecting additional sewerage usage fees. Started operation of Rokuura Pumping Station. |
| 1975 | Revision of sewerage usage fees - Adopted a gradual increase system. |
| 1976 | Formulated the 4th Five-Year Plan (313.5 billion yen) with FY1976 as the first year. Started improving the surface of the Kanagawa treatment zone. |
| 1977 | Started operation of the Green Sewage Treatment Plant. Started improving the surface of the green treatment zone. |
| 1978 | Revision of sewerage usage fee. Started operation of Kanagawa Sewage Treatment Plant. Started operation of the Niwa pumping station and Hodogaya pumping station. Started improving the surface of the Kanazawa processing zone, the main line in the western processing zone. |
| 1979 | Started operation of Kanazawa Sewage Treatment Plant. Operation of the Tozuka pumping station started. |
| 1981 | Formulated the 5th Five-Year Plan (739 billion yen) with FY1981 as the first year. Established the Sewer Business Study Group. Revision of sewerage usage fee-Includes 5% of capital cost related to general drainage. Started operation of the northern second sludge incineration facility. Start of operation of Kanazawa pumping station Started improving the surface of the western treatment zone. |
| 1982 | Operation of Kasama Pumping Station started. |
| 1983 | Started operation of the western sewage treatment plant. |
| 1984 | Started operation of the Northern Second Sewage Treatment Plant and Totsuka Daiichi Sewage Treatment Plant. |
| 1985 | Revision of sewerage usage fee. [Capital expense ratio: 30% and average revision rate: 46%] Started operation of Takada pumping station. |
| 1986 | Formulated the Sixth Five-Year Plan (¥ 610 billion) with FY1986 as the first year. Started operation of the Chubu Sewage Treatment Plant. Operation of the Kamoi pumping station and Kawamukai pumping station. |
| 1987 | Established the Sewer Business Study Group. Started operation of the Northern Sludge Treatment Center. Operation of the Kamisueyoshi Pumping Station and Mansei Pumping Station. |
| 1989 | Started operation of the Southern Sludge Treatment Center. |
| 1991 | Formulated the 7th Five-Year Plan (¥ 612 billion) with FY1991 as the first year. Started operation of Egasaki pumping station. |
| 1993 | Revision of sewerage usage fee. [Capital expense ratio: 60% and average revision rate: 22.7%] Operation of Hiranuma pumping station started. |
| 1995 | Egawa murmuring service commenced. |
| 1996 | Revision of sewerage usage fee. [Capital cost inclusion rate: 78.4%, average revision rate: 13.1%)] Waterfall river murmuring service started. |
| 1997 | Start of the Yumehama 2010 Plan (9-13) |
| 1999 | Revision of sewerage usage fee [Capital cost inclusion rate 90%, average revision rate 9.0%] Development of water environment master plan. Isogo No. 2 Pumping Station started operation. |
| 2000 | Started operation of the third pumping station at Chubu Sewage Treatment Plant. |
| 2002 | Start of medium-term policy plan (2014-2018) |
| 2003 | Started operation of Kusu pumping station. |
| 2004 | Started operation of the second pump facility in the northern second sewage treatment plant. |
| 2005 | The lower Water Works Bureau, the Green Administration Bureau and the Environmental Protection Bureau will be integrated into the Environmental Planning Bureau. Each treatment plant was renamed the Water Reclamation Center, and the Sludge Treatment Center was renamed the Sludge Recycling Center. |
| 2006 | Established the Yokohama City Sewerage Business “Mid-term Management Plan 2007”. |
| 2007 | Combination improvement facility "Yamashita Pumping Station Rainwater Retaining Area" started operation. |
| 2008 | Sewer Exhibition '08 Held in Yokohama. (Nationwide scale) |
Inquiries to this page
Management Promotion Division, Sewerage and Rivers Bureau Management Promotion Department
Phone: 045-671-2838
Phone: 045-671-2838
Fax: 045-664-0571
E-Mail address [email protected]
Page ID: 367-641-929
