Construction of Giresun Wastewater Treatment Plant  Tender Dossier Volume 3 Employer’s Requirements  Section 05: Earth Works, Pipe Works and Ground Improvement  9 of 49 service. Unless already detailed in the contract documents, the Engineer will then advise on the action  to be taken.  The Contractor shall arrange for the refilling and reinstatement of trial holes to be carried out immedi- ately the required information is obtained. The reinstatement of the surfaces of trial holes shall be car- ried out to the approval of the Engineer.  Contractor shall get the necessary permissions for crossing existing infrastructure from related Author- ities and provide necessary data requested by these Authorities.  Contractor shall take all necessary safety precautions before starting the Works. All intersections and  parallel constructions shall be subject to the approval of the Engineer. After crossing the paved roads, drainage systems sidewalks and pavements shall be restored to original  position by the Contractor. New pavement repair width shall be proportional with the road width.  At locations where new pipelines or culverts cross the roads, the soil cover above the pipe crest or top  of box culvert shall be at least 1.50 meters. At locations where new pipelines and culverts cross railroads or major highways, the crossing shall be  made by pipe jacking or similar method without disturbing the traffic.  The Contractor shall keep all excavations for structures and pipelines clear of water from whatever  source, so the works are constructed under dry conditions.  The method of keeping the excavations clear of water, dewatering and the disposal of water, shall be  subject to the approval of the Engineer. The Contractor shall provide all the equipment for pumping  and shall ensure that sufficient stand-by plant is on site at all times to avoid any interruption in conti- nuity of dewatering. For dewatering of the excavation one of the following techniques can as examples be used:  The usage of the above methods will depend on the soil characteristics as described in the geotechnical  investigations.  Earth excavation shall consist of excavating, removing and disposing of satisfactorily any material,  regardless of the material encountered for all parts of the works. The Contractor's method of excava- tion shall be subject to the approval of the Engineer.  Earth excavation is excavation of any naturally occurring or man-made or placed material that can be  removed manually or by mechanical shovel, bulldozer or ripper.  The Contractor shall also remove unsuitable materials/soils or excess soils from the site and dispose it  in a manner to the approval of the Engineer. The permitted location of the disposal area is identified in  EIA study, besides this the location shall be subject to the approval of the Engineer.  5_Vol3_d4.3_Section 5 Earth and pipe works_en_GIR_rev6.docx  5.2.5 Intersections with roads, highways and railroads  5.2.6 Drainage and dewatering  5.2.7 Excavation  5.2.7.1 General   Dewatering with pumping from wells;   Pumping directly from the excavation;  Pumping from drilled and filtered wells; and  Pumping from acicular filter systems.