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History of Sewerage System Construction

I.Taipei Sanitary Sewer System Master Plan

In 1969, to improve the worsening of the environment sanitary and river pollution conditions in the Taipei area, the planning of the project, and the report of “Sanitary Sewer Master Plan for Taipei Area” was completed in 1972. The primary concept of the plan is to consider the Taipei basin as a sewage area (including the Taipei City and the Taipei suburban areas) for the installation and embedment of the primary sewage trunks along the three main rivers of the Keelung River, Hsintian Creek and Dahan Creek according to the geographical condition in order to transport the sewage to the Danshui river estuary for preliminary treatment, followed by draining into the ocean water.

II.Taipei Sanitary Sewer System Initial Implementation Plan 

The Taipei City Government proposed the “Taipei Sanitary Sewer System Initial Implementation Plan” after establishing the Taipei Tap-Water and Sewerage Systems Office of the Public Works Department in 1972. In addition, the Taipei City Sewerage Systems Office of the Public Works Department is responsible for the sewerage construction. 
To achieve the objectives of improving the environmental sanitary for the city area and reducing the pollution of the Keelung River system for Taipei City, it was decided that the six-year construction of the first and second stages of the initial implementation plan was to be further revised and followed by the stipulation of the first phase six-year construction execution plan, which was listed in the “Six-Year Economic Development Plan For Taiwan R.O.C” according to the approval by the Executive Yuan and had been implemented in practice since 1975.The second phase six-year construction execution plan was implemented in practice from 1981 to 1986. In addition to the continued construction of the items unfinished in the first phase six-year construction execution plan, it was still based on the initial implementation plan concept to complete the Taipei pipeline system as a principle for the execution. 
 

Sewerage Systems Office, Public Works Department, Taipei City Government

III.Taipei City Sewerage System Plan

When the construction of the second phase six-year construction of the Sanitary Sewer System Initial Implementation Plan finished according to the schedule, there were still parts of the construction remained uncompleted and among which, the relative important items, such as the laying of the primary and secondary trunk sewers, sub-trunks, branching networks and household connections, failed to be executed according to the schedule progress due to financial and manpower shortages. In addition, due to the subjective and objective factors of changes in urban development and public infrastructure planning concepts, reviews on the Taipei City's sewerage system was required in order to allow the system to satisfy the actual demands. As a result, the “Taipei Sewerage System Plan” was proposed in 1988. 

IV.Early-Stage Planning for Taipei City Sewerage System Subsequent Development Plan

Upon the completion of the revision of “Taipei City Sewage System Plan” in 1988, primary and secondary trunks as well as household connecting pipelines were constructed vigorously, and “Early-Stage Planning for Taipei City Sewage System Subsequent Development Plan” was completed in 1999. Therefore, the construction of the later sewage system and the operation management thereof could be facilitated and promoted smoothly.
After the completion of the common drainage facilities, the Taipei sewage system is divided into three collection and treatment systems of the Neihu sewage treatment plant, Dihua sewage treatment plant and Bali sewage treatment plant, defining 6 main trucks and 28 secondary trunks in the systems. 

V.Planning for Sewage Collection Points in Taipei City's Subsequent Service Area

The administrative region of the Taipei City has a total area of 27,180 hectares and some suburban areas cannot be completely connected to the public sewerage system service range due to their local terrains and environments. Such areas are defined as the “Subsequent Service Area for Public Sewage System”. Investigations and evaluations are also conducted on the condition of the sewage drainage for such areas in order to outlines the plan for the sewage collection treatment method.

VI.Planning for Taipei Sewage System Subsequent Development Plan

With the consideration on the rapid changes of the population and social as well as economic environments of Taipei City and the increase of the public awareness on the environmental protection, to allow the Taipei City sewage system later development to cope with the urban demands, it is expected to review the past and to plan the future to facilitate the planning of subsequent sewage system development strategy, the main principles are as follows:

  1. Planned area: Administrative area of 27,180 hectares under the jurisdiction of Taipei City.
  2. Projected area: Taipei City sewage system service range of 12,998 hectares.
  3. Projected target year:2032.
  4. Projected population: 2.76 million.
  5. Projected sewage amount: 870 thousand m3/day.
  6. Project content: Review of existing primary and secondary trunks as well as collection of sewage in divisional sections, emergency countermeasure reviews and policy, sewage treatment plant function enhancement and resource recycling performance evaluation, long lifetime execution and long term development strategy and so on. 

Zhong Xiao Gravel Contanct Oxidation Facilities

Sewerage Systems Office, Public Works Department, Taipei City Government

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