Kingscote Streets Upgrades - Kangaroo Island Council

• For trench excavation, the volume shall be calculated from the depth and length measured in
liaison with the Superintendent, and the minimum width of trench for the application, as shown
on the drawings.
• No payment shall be made for over break beyond the limits of the required excavation.
3.3.7.5 Protection of Excavations
All work necessary to protect excavations and prevent damage to adjoining structures, services and
property is the responsibility of the Contractor. This responsibility includes installation and
maintenance of timbering, shoring, strutting, bracing, sheeting, piling, etc.
The Principal assumes no responsibility whatsoever in respect to the stability of the ground to be
excavated and the Contractor will be deemed to have satisfied themselves through their own
investigations as to conditions to be encountered.
The provisions of Division 5.5 of the Regulations under the Occupational Health, Safety and Welfare
Act 1995 shall also apply.
Should the Contractor fail to provide and/or fail to adopt methods which are to the satisfaction of the
Superintendent, the Superintendent may order work to cease until such time as equipment is
provided and methods adopted which are to the satisfaction of the Superintendent.
3.3.7.6 Dewatering of Excavations
Excavations are to be maintained in a thoroughly drained condition at all times. If, during the course
of excavation, the natural ground water is encountered, the Contractor shall be responsible for dewatering
the excavation in a safe and efficient manner.
The Contractor shall judge for himself the likely extent of groundwater (if any) and its effect on the
execution of the contract and shall be deemed to have made due allowance in his tender for all
costs involved in dealing with groundwater.
Groundwater pumped from excavations shall be disposed of in a manner which satisfies the
requirements of the Environmental Protection Authority.
3.3.7.7 Disposal of Surplus Excavated Material
All surplus excavated material arising from the specified works is to be disposed of by the Contractor
off site.
The Contractor is responsible for any environmental testing, or additional environmental testing if
testing has previously been undertaken, necessary to dispose of the excavated material.
3.3.8 Fill Construction
Filling construction includes all operations associated with the preparation of foundation areas where
fill is to be placed, and the placing and compaction of approved suitable material.
In locations where filling is required to achieve the design formation levels, the filling shall be carried
out in the manner specified hereunder.
3.3.8.1 Fill Foundation and Proof Rolling
Prior to placement of fill material the natural surface shall be inspected by the Superintendent and
GITA (as applicable to meet the requirements of AS 3798) and the fill foundation shall be proof
rolled with a minimum 12 tonne static mass.
If the Superintendent considers the surface is suitable, the Contractor shall commence filling as
described below. If the Superintendent considers that the surface is unsuitable, the Contractor shall
carry out additional excavation or other measures as may directed by the Superintendent, and any
such work shall be considered as a variation to the contract.
Filling shall commence only after the surface upon which fill material is to be placed has been
inspected and approved by the Superintendent.
Ref No. 20120236SA1 Kingscote Streets Upgrades Technical Specification 7