LDM Summary of changes

NCC Land Development Review 2009
(Engineering Standards)

Summary of Draft Changes

This table summarises the changes proposed. Please see each section document for specific changes. New sections will be added to top with date stamp for future reference.

Section Description/Change

4 Transport
(added 17 Nov)

Description/Change

The review of this section has resulted in a large number of changes from the current section of the Engineering Standards. This includes additional technical information as well as changes to the design philosophy of roads. Some of the main changes are as follows:

4.1 Introduction
  • Key objectives include permeable, connected and attractive network that encourages walking and cycling and minimises number of short vehicle trips.
  • Road design that includes principles of Crime Prevention Through Environmental Design (CPTED), slower movement of vehicles in residential neighbourhoods and minimising earthworks for road construction in hillside environments.

4.2 Transport Network
  • Principle functions of roads are place and movement.
  • Road Hierarchy definition
  • Importance of integration and connections with adjoining development

4.3 Road Design
  • Table 4-4, Residential Lane (Public Road) 7 – 25 dwellings, 8.5 legal width
  • Guiding principles and design for walkable and cycle communities
  • Traffic calming measures to create low speed environments

4.4 Construction
  • Requirements for retaining walls
  • Alternatives to grassed berms

Table 4-6
  • Narrower carriageway widths for right of ways

10 Electrical (added 21 Sept)

Description/Change

10.3 Road Lighting
  • Additional design and specifications added including lists of approved Luminaires, Lamps and Columns

8 Trenching and Reinstatement
(added 21 Sept)

  

Description/Change

8.3 Notification
  • Requirements of the ‘National Code of Practice for Utilities, Access to the Transport Corridors’ added

8.7 Surface Reinstatement
  • All surfaces to be completed and sealed before allowing pedestrians and vehicles to use.
  • Rubberised pre fabricated chip seal permitted as a temporary sealed surface.
  • Full width reinstatement must be undertaken in trenching in footpath surfaces less than 5 years old.

All Sections

14 September 2009
  • Objectives and Performance Criteria included
  • Updated to include new and amended NZ Standards and Codes of Practice etc.
  • Format and Layout to match TDC's doc where possible.

5 Stormwater

14 September 2009

Description/Change

5.5.1 Design Methodology
  • Stormwater management approaches can be incorporated where appropriate

5.5.2 Climate Change
  • Information on MfE latest sea level rise predictions and recommendations included

5.5.3.5 Bubble up sump
  • Amended so bubble-up sump not placed in road carriageway. See 21/210.
  • Kerb Entries generally not now accepted

5.10 Overland Flow Path
  • Capacity requirements for overall system capacity included (including secondary flow paths)

5.5.5 Rainfall Intensity
  • Updated following NIWA report for Nelson. Increased by 16% for climate change predictions. Q15, 80mm/hr intensity now equivalent to 13-14min duration (20min currently)

5.6.1 NCC Datum
  • Info and diagram explaining relationship to other datums

5.6.3 Minimum ground levels for tidal inundation
  • Currently under review and awaiting release of NES.

5.7.3 Sump Capacity
  • Include capacity rates for sump inlets

5.16 Low Impact Design
  • Include design requirements for various LID options (operation and maintenance requirements included)

5.17.2 Pipe Bedding
  • Use sand (in sand environment) or AP20. If 'drainage' or 'pea' metal used then wrap in filter cloth and install water stops.

5.18 CCTV Testing
  • New section

6 Wastewater

14 September 2009

Description/Change

6.3.2.1 Residential Flows
  • Include flow rate information

6.3.6 Manholes
  • Allow prefabricated plastic manholes
  • Ladder rungs now not permitted in std manholes

6.3.7 LHCE
  • Reduce the number of std manholes by allowing more LHCE and buried bends

6.3.8 Inspection T
  • To be installed on all new laterals

6.4 Pump Stations
  • Include detailed requirements for private and public systems

6.5.2 Bedding
  • Use sand (in sand environment) or AP20. If 'drainage' or 'pea' metal used then wrap in filter cloth and install water stops.

6.6 Testing
  • Include pipe gauging and CCTV

7 Water

14 September 2009

Description/Change

Table 7-3 Design demand flow rates
  • New information

7.2.7 NZ Fire Service
  • New fire fighting requirements

7.6.1 Thrust Block Design
  • Design information added

7.8 Pumping and Reservoirs
  • Design and construction information included, new section

7.9.2 Bedding
  • Use sand (in sand environment) or AP20. If 'drainage' or 'pea' metal used then wrap in filter cloth and install water stops.

12 Reserves and Landscaping

14 September 2009

Description/Change
 
  • A complete new section, separated from the Roading (Transport) section. Additional information included throughout in form, function and layout requirements