Overview of PUB’s External Works

Pre-DG

(Land Use, TCOT, PAFS, TIA)

To establish development boundary, any Drainage Reserve (DR), drain size for affected/proposed public drain and sewer connection, water pipe diversion requirements

Site plan overlay with PUB Services Plans (Drainage Interpretation Plan, Sewerage Information Plan and Water Service Plan) showing the drainage reserves or land reserved for future drainage schemes, common drain, location and alignment of public sewers or pumping mains, and approximate position of the water mains and raw water mains in the vicinity of the development.

• Site plan with drainage, sewerage, and water main information
• Sewer discharge quantity
• Water demand

To seek clarifications for details to be submitted at Design Gateway (G1) stage

Key evaluation areas include:

• Any storm water drainage works, erection or placement of any structures in, above, or across any drain or drainage reserve
• Any temporary structures / works / services over, across, or adjacent to any storm water drainage system
• Any proposed realignment of Drainage Reserve to be set aside and vested to State
• Any works affecting any public sewers / sewerage system or public drains
• Any buildings or structures erected over, across, or adjacent to any public sewerage system
• Proposed connection of the development / premises to the public sewers / sewerage system

• Architectural/Engineering drawings
• Topo Survey Plan

• To establish MPL requirements
• To assess proposed works affecting drainage and linkages to underground Special Facilities (e.g., Rapid Transit System)
• To assess proposed works affecting sewer (e.g., capacity, setback, sewer connection, alignment, and size for diversions)

Key evaluation areas include:

• Any storm water drainage works, erection or placement of any structures in, above, or across any drain or drainage reserve
• Any temporary structures / works / services over, across, or adjacent to any storm water drainage system
• Any proposed realignment of Drainage Reserve to be set aside and vested to State
• Any works which could affect any public sewers / sewerage system or public drains including common drains directly or indirectly;
• Any buildings or structures erected over, across, or adjacent to any public sewerage system; and
• Proposed connection of the development / premises to the public sewers / sewerage system

• Architectural/Engineering drawings
• Topo Survey Plan

Prior to commencement of piling works, QP/PE shall obtain approval for relevant works requiring Earth Control Measures, or specified activities within water and sewer pipe corridor

Details of specified activities within water and sewer pipe corridor, temporary works affecting drains, within drainage reserve as listed under "Independent Submissions"

• Engineering drawings
• Topo Survey Plan
• Method Statement
• Engineering calculations
• PE-endorsed reports

To evaluate detailed plans for proposed drainage (e.g. upgrading, new construction) and sewerage works (e.g., sewer diversion)

• Works affecting sewer (e.g., proposed sewers / manholes, pump sumps / pumping main, RC trench for housing the public sewer)
• Works affecting drainage (e.g., common drain, Drainage Reserve entrance culvert / roadside drain, slab over drain for meter compartment)

• Engineering drawings
• Engineering calculations
• PE-endorsed reports

To obtain PUB’s approval for works / site activities within RRL affecting drainage, sewerage, or water services (where applicable)

Drainage:

• Earth Control Measures (ECM) Plan
• Details of temporary works affecting drainage / within drainage reserve

Sewerage/Sanitary:

• Details and scope of works on manholes and sewers
• Specified activities within sewer corridor

Water:

• Site plans, water reticulation schematic/layout drawing of WSI design works and water requirements
• Specified activities within water pipe corridor

• Engineering drawings
• Topo Survey Plan
• Method Statement
• Engineering Calculations
• PE-endorsed reports