8 of 49 Construction of Giresun Wastewater Treatment Plant  Tender Dossier Volume 3 Employer’s Requirements  Section 05: Earth Works, Pipe Works and Ground Improvement  Where the diversion of any existing carriageway, footway or public right of way is temporarily made  necessary by the Works, the Contractor shall provide and maintain an alternative, acceptable to the  Engineer, which shall be operational before any interference with the existing way takes place.  Where ramps are required, they shall be provided and maintained to a standard suitable in all respects  for the class or classes of traffic or pedestrians requiring to use them.  The Contractor shall maintain emergency vehicle access to all properties at all times.  Where single line traffic operation is unavoidable, the Contractor shall provide a proper system of traf- fic control as agreed by the Engineer.  5.2.3 Extent of excavations  The construction of open trenches shall, at any time, be limited to lengths previously approved by the  Engineer, in writing. Unless otherwise approved by the Engineer in writing work on each approved  length shall be completed to the satisfaction of the Engineer before work on any new length is com- menced.  5.2.4 Relocation of possible utilities and trial holes  The Contractor shall take all steps necessary to find, protect and safeguard any drains, pipes, cables  and similar services encountered, already installed or to be installed, for the duration of the contract in  order to keep them in good working condition. Should the services become damaged during the course  of the works, then the Contractor shall be responsible for liaising with the responsible utility compa- nies or organizations and arranging for the repair of that service and bear all costs associated with the  repair of the service.  Information as may be given in the contract in relation to the present condition and character of the  existing structures, roadways, embankments and the like and in relation to the dimensions of various  parts of the existing structures, the position, extent and particulars of drains, pipes, cables and the like,  is given without guarantee of accuracy and neither the Employer nor the Engineer will be liable for  any discrepancy therein.  The absence of such information shall not relieve the Contractor of this liability for the cost of any  repair work necessitated by damage caused by him to such mains and services in the course of his  work and for the cost of all losses arising from their disruption.  The Contractor shall obtain all available information, assistance, full permission and approval of all  relevant utility companies or organizations regarding the positions and/or relocation of mains and ser- vices, serving notices of intent to start work as may be necessary in accordance with all the local laws  and regulations. He shall make this information available to the Engineer as soon as he obtains it. He  shall agree with the Engineer any trial excavations, which may be necessary to confirm or establish  these locations. All costs for executing trial holes shall be deemed to be included in the Contractor's  quotation for the earthworks. All relocating works shall be carried out two weeks in advance of execu- tion of the relevant work.  Any temporary or permanent diversion and/or relocation of mains and services will only be permitted  after agreement with the appropriate utility companies or organizations and the approval of the Engi- neer.  Where a service, or obstruction is encountered along the route of a pipeline or in other excavation  works which prevents the Contractor from carrying out his work, the Contractor is to inform the Engi- neer immediately of its presence and shall submit details, including the type of service, or obstruction,  its dimensions, depth below ground level and his proposed method of overcoming the obstruction or  5_Vol3_d4.3_Section 5 Earth and pipe works_en_GIR_rev6.docx 