Dunedin City Council

Source Documents

These are the council documents used to build the DCC calculator. If a link is broken, the document may have moved on the council website.

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Code of Subdivision and Development (2010)

PDF Primary Source

Calculation Methodology

Method: Site-Specific Design

Dunedin requires site-specific design. Post-development must result in no significant increase of runoff up to the 10-year event. Source control (on-site soakage and detention) required to reduce peak flows. Detention structures must have an 80-year design life.

Design Requirements

• 10% AEP (10-year) - no significant increase in runoff to receiving body
• Detention structure design life: 80 years
• Source control systems: on-site soakage + detention
• Catch-pits designed for 10% AEP design runoff
• Stormwater Quality Bylaw 2020
• Code of Subdivision and Development 2010

Submission

Required Documents

• Site-specific stormwater design report
• Pre/post development flow calculations
• Source control system design (soakage + detention)
• Detention sizing for 10% AEP
• Engineering plans and drawings
• Manufacturer's specifications

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