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(5)Tree Preservation. Any facility located within the drip line of any <br /> tree designated by the Director of Engineering & Infrastructure to <br /> be preserved shall be bored under or around the root system. <br /> (b) Trenching. Trenching for facility installation, repair, or maintenance on <br /> rights-of-way shall be done in accord with the applicable portions of <br /> Section 603 of IDOT's "Standard Specifications for Road and Bridge <br /> Construction." <br /> (1) Length. The length of open trench shall be kept to the <br /> practicable minimum consistent with requirements for pipe-line <br /> testing. Only one half of any intersection may have an open trench <br /> at any time unless special permission is obtained from the Director <br /> of Engineering & Infrastructure. <br /> (2) Open Trench and Excavated Material. Open trench and <br /> windrowed excavated material shall,be protected as required by <br /> Chapter 6 of the Illinois Manual on Uniform Traffic Control Devices. <br /> Where practicable, the excavated material shall be deposited ', <br /> between the roadway and the trench as added protection. <br /> Excavated material shall not be allowed to remain on the paved <br /> portion of the roadway. Where right-of-way width does not allow for <br /> windrowing excavated material off the paved portion of the <br /> roadway, excavated material shall be hauled to an off-road location. <br /> 42 <br />