The three divisions, namely Hong Kong & Islands, Mainland South and Mainland North, of the Operation and Maintenance Branch maintain the record of existing public sewerage and stormwater drainage systems in the Territory. These drainage records are to be updated continuously according to the as-built drawings of drainage infrastructures. However, it should be noted that the alignments and levels of drains shown on records are subject to verification on site and it is not guaranteed that all the drains have been included in the drainage record plans.
Drainage record plans are available for public inspection free of charge at the Drawing Offices at the address below:
The above charge is subject to revision from time to time. Drainage record plans can be given to all Government Departments and utilities undertakers on request. Consultants for Government projects can request for drainage record plans for information and reference but their request must be endorsed by their respective client departments. The private developers, their Authorised Persons and consultants may want to obtain the existing drainage information associated with their proposed development. In this circumstance, they can send representatives, together with bearer letters, to the drawing office of the respective O&M Divisions of DSD to inspect the relevant drainage record plans currently available. After inspection, the drainage record plans could be purchased at prices given above. Sample content of a bearer letter is given below:
Please note that drainage information is now available in the GeoInfo Map services of the Lands Department (https://www.map.gov.hk/gm/?lg=en). Please refer to the Quick Reference Guide of the system for the operation.
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