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shall immediately notify the Engineer and the Owner of the affected structure. When any <br />existing facilities are endangered by the Contractor's operations, the Contractor shall cease <br />work at the site and take such precautions as may be necessary to protect the in -place <br />structures until a decision is made as to how the conflict will be resolved. <br />Without specific authorization from the Engineer, no utility service shall be disrupted, nor shall <br />any change be made in either the existing structures or the planned installations to overcome <br />the interference. Alterations in existing facilities will be allowed only to the extent that service will <br />not be curtailed and then only when the encroachment or relocation will satisfy all applicable <br />regulations and conditions. <br />Wherever alterations are required as a result of unforeseen underground interferences not due <br />to any fault or negligence of the Contractor, the Engineer will issue a written order covering any <br />additional or extra work involved and specifying the revised basis of payment, if any. Any <br />alterations made strictly for the convenience of the Contractor, shall be subject to prior approval <br />and shall be at the Contractor's expense. No extra compensation will be allowed for delays <br />caused by the interference of underground structures. <br />A5 Removal of Surface Improvements <br />Removal of surface improvements in connection with trench excavation shall be limited to actual <br />needs for installation of the pipeline and appurtenances, based on the allowable trench widths <br />and any other controls imposed in connection with the work. Removal operations shall be <br />coordinated effectively with the excavation and installation operations as will cause the least <br />practical disruption of traffic or inconvenience to the public. The debris resulting from removals <br />shall become the property of the Contractor and shall be disposed of by the Contractor in <br />accordance with MnDOT Specification 2104 and the Special Provisions. Removal debris shall <br />not be deposited at locations that will block access to fire hydrants, private driveways, or other <br />essential service areas, nor obstruct surface drainage. Removal and final disposal of debris <br />shall be accomplished as a single operation wherever possible and, in any event, the debris <br />shall be removed from the site before starting the excavating operations. <br />Removal of concrete or bituminous structures shall be by methods producing clean-cut <br />breakage to pre -scored lines as will preserve the remaining structure without damage. Removal <br />equipment shall not be operated in a manner that will cause damage to the remaining structure <br />or adjoining property. Where not removed to an existing joint, concrete structures shall be <br />sawed along the break lines to a minimum depth of one-third (1/3) of the structure depth. <br />Any reusable materials generated during the work, such as aggregate, sod, topsoil, shall be <br />segregated from other waste materials and be stockpiled so as to maintain suitability and permit <br />proper reuse. <br />The use of drop weight equipment for breaking pavement will be allowed to the extent that the <br />Contractor shall assume full responsibility for any damages caused thereby. The pavement <br />breaking operation shall not be allowed to become a nuisance to the public or a source of <br />damage to underground or adjacent structures. The Engineer reserves the right to order <br />discontinuance of drop weight breaking operations at any time. <br />Page 6 <br />