Before proceeding with the design of a proposed development, Qualified Persons (QPs) must obtain the relevant information from PUB Services Plans, and conduct site surveys to verify the alignments and invert levels of the public sewers/pumping mains/sewer connections and drainage reserves/common drains/water mains.
PUB Services Plans can be obtained from SLA INLIS. Click here to access.
Sewerage Information Plan (SIP) indicates the location and alignment of public sewers or pumping mains in the vicinity of the development. Details of the existing sewer connections at the development may not be shown. QPs should ascertain/verify details of the existing sewer connection on site.
Drainage Interpretation Plan (DIP) indicates drainage reserves or land reserved for future drainage schemes. Details of the common drain at the development may not be shown. QPs should ascertain/verify details of the common drains on site; and the Minimum Platform Level (MPL) for effectual surface water drainage.
Water Service Plan (WSP) indicates the approximate position of the water mains and raw water mains in the vicinity of the development. Smaller submains and connection pipes (< 100 mm) to customers’ premises/properties may not be included. QPs shall determine and indicate the exact alignments and depths of the watermains, submains and connections, on site by means of trial holes before commencement of any work. The position and alignment of the watermains shall be indicated on the survey plan, and shown at site to allow easy identification of the watermains in future after completion.