Download DATE: CONDITION No - Nelson City Council

DATE:
28-Jul-09
CONDITION No:
C1466
STREET ADDRESS:
Istana Place/Princes Drive/Crown Terrace
DIAGRAM:
Yes
LEGAL DESCRIPTION
LT417875
PROPERTY OWNER
or SUBDIVIDER:
K B Quarries Ltd
SCHEME PLAN No:
RM005141
NCC PLAN No:
AUTHORITY:
Mike Johnstone
REASON FOR CONDITION:
(Abbreviated)
As result of a Subdivision
CONDITION:
1.
Buildings shall be within the areas designated as Area Generally Suitable for
Development in Accordance with NZS3604 and/or Area requiring Specific Investigation
and Design as shown on Tonkin & Taylor drawing Lot Certification Plan (ref.81069.01005 Rev S), dated July 2009.
2.
The subdivision incorporating Lots 17 to 24, 35 and 134 to 140 has involved substantial
earthworks resulting on all lots, other than lots 138 and 139, natural, cut or filled ground
interfaces as depicted on Tonkin & Taylor Fill Certification Plan (ref.81069.010-03),
dated June 2009. Indicative cut and fill thicknesses are shown on Staig & Smith Iso
Contour Plan 10471/1, dated 27 February 2009.
3.
No earthworks involving cuts or fills greater than 0.3 m in height or thickness or
buildings other than minor non-habitable structures, such as garden sheds or gazebos that
can be easily relocated, shall be undertaken within the areas on Lots 17 to 23 inclusive,
and 134 and 135 designated Restricted Building Area on Tonkin & Taylor drawing
81069.010-05 Rev S Lot Certification Plan (ref.81069.010-05 Rev S), dated July 2009.
4.
Foundations for all buildings shall extend through topsoil, subsoil and any fill not
certified in accordance with NZS 4431: 1991 – Code of Practice for Earth Fill for
Residential Development and be founded on “Good ground” as defined by the New
Zealand Building Code. Foundations on land sloping in excess of 1V:3H shall be
designed to accommodate lateral loads.
5.
The Area Generally Suitable for Development in Accordance with NZS3604 comprises
cut and filled ground suitable for shallow foundations constructed in accordance with
NZS 3604: 1999 – Timber Framed Buildings. Foundations for all buildings not meeting
NZS 3604 and requiring an ultimate bearing capacity greater than 300kPa, foundations
shall be specifically investigated, designed and constructed under the supervision of a
chartered professional engineer practising in civil engineering and experienced in
foundation design.
6.
Within the Specific Investigation and Design Area, foundations shall be specifically
investigated, designed and inspected during construction by or under the direction of a
chartered professional engineer practising in geotechnical engineering. Specific attention
shall be given to verify the presence of cut/fill boundaries on lots 35, 136, 137 and 140
where they may occur under or in close proximity to buildings.
7.
Where foundations straddle the boundary between the Area Generally Suitable for
Development in Accordance with NZS3604 and the Area requiring Specific Investigation
and Design the entire design structure shall be reviewed by a chartered professional
engineer practising in geotechnical engineering.
8.
Within the Area Generally Suitable for Development in Accordance with NZS3604 all
temporary and permanent cuts greater than 1.2 m in height shall be specifically
investigated by a chartered professional engineer practising in geotechnical engineering
or by an experienced engineering geologist. No existing slopes inclined on a grade
steeper than 2.5H: 1V shall be steepened by unretained cutting.
9.
Within the Area requiring Specific Investigation and Design all temporary and permanent
cuts greater than 0.8 m in height shall be specifically investigated by a chartered
professional engineer practising in geotechnical engineering or by an experienced
engineering geologist. No existing slopes inclined on a grade steeper than 2.5H: 1V shall
be steepened by unretained cutting.
10. Fill greater than 0.8 m thick and all fill proposed to be beneath structures, including
hardstanding areas, shall be certified as meeting the requirements of NZS 4431: 1989 –
Code of Practice for Earth Fill for Residential Development, and shall include adequate
stripping, benching and underdrainage. All fills within the Area requiring Specific
Investigation and Design greater than 1.0 m in thickness shall be investigated, designed
and inspected during construction by or under the direction of a chartered professional
engineer practising in geotechnical engineering. No unretained fill shall be placed on
ground sloping greater than 2.5H: 1V.
11. In the Generally Suitable for Development in Accordance with NZS3604 area retaining
walls over 1.2 m in height shall be specifically investigated, designed and inspected
during construction by or under the direction of a chartered professional engineer
practising in civil engineering. All walls shall be adequately drained.
12. In the Area requiring Specific Investigation and Design retaining walls shall be
specifically investigated, designed and inspected during construction by or under the
direction of a chartered professional engineer practising in geotechnical engineering. All
walls shall be adequately drained.
13. Development of the lots shall not detrimentally alter overland flows, including on
adjacent lots, and if necessary additional drainage shall be installed under the direction of
a chartered professional engineer practising in civil engineering.
14. Buried sewer or stormwater drains or subsoil drainage exist on most lots and their
presence shall be allowed for during development of the lots.
15. A subsoil drain outlet exists within the Lot 134 as approximately located on Staig &
Smith drawing Stormwater 10275/10471, dated 1 May 2009. As required by a consent
notice on the title of the lot, the lot owner shall ensure that the outlet is kept clear of any
obstruction, including spoil and vegetation roots.
16. All stormwater from roofs, hardstanding or impermeable areas, retaining wall drainage,
surface and subsoil drains and overflows from standing water such as pools and ponds
shall be collected and discharged in a controlled manner to the Nelson City Council
Stormwater System.
17. Where practical to do so, the lots shall be maintained in a vegetation cover or alternative
slope cover that prevents erosion with on sloping ground an emphasis on deep-rooted
trees and shrubs to enhance slope stability.
Explanatory Note: depending on the location and scale of works requiring geotechnical
input, Council may allow design and construction to be investigated, designed and
inspected during construction by or under the direction of a chartered professional
engineer practising in civil engineering. In such circumstances the design shall be
reviewed, and ground conditions confirmed, by a chartered professional engineer
practising in geotechnical engineering or by an experienced engineering geologist and
recognised as such by the Nelson City Council.
Tonkin & Taylor (ref.81069) Earthworks and Building Site Certification Report Istana
Place/Crown Terrace Subdivision, Tasman Heights, Nelson, dated June 2009, Statement
of suitability of earthfill for residential development: Istana Place/Crown Terrace
Subdivisions, Tasman Heights, Nelson, 8 June 2009, and Geotechnical Certificate –
Proposed Building Sites, Lots 17 to 24, 35 and 134 to 140 Istana Place, Tasman Heights,
Nelson, dated 23 July 2009, relate to the general suitability of the lots. They do not
remove the need for specific site investigation, design and inspection as required by the
Building Code, NZS 3604: 1999 and NZS 4431: 1989.
Date Entered: 21-Jul-09