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Proj. 06-1500, 07-3206, & 09-3521 ADDENDUM NO. THREE March 27, 2009 Prior to the beginning of excavations requiring shoring, the Contractor shall designate, in writing to the Engineer, someone whose responsibility is to supervise the project safety measures and someone whose responsibility is to supervise the installation and removal of sheeting, shoring, and bracing. The excavations and shoring, shall be such as to protect all existing improvements and utilities from any damage and to be fully compatible with all requirements for traffic and access and the safe performance of the work. Attention is directed to the trench width distances on the plans. The design of the conduit and the shoring is based on this maximum width. If the trench width exceeds the maximum design width, the pipe bedding, pipe D-Load and the shoring shall be redesigned. The Contractor shall be responsible for any additional costs due to the increased trench width. In addition to shoring the excavations in accordance with the minimum requirements of the Industrial Safety Orders, it shall be the Contractor's responsibility to provide any and all additional shoring required to support the sides of the excavation against the effects of loads which may exceed those derived by using the criteria set forth in the Industrial Safety Orders. The Contractor shall be solely responsible for any damages which may result from his failure to provide adequate shoring to support the excavation under any or all of the conditions of loading which may exist, or which may arise during the construction of the project. Trench plating required per the traffic control section of these specifications and as directed by the Engineer shall be capable of supporting H2O loading and have a non-skid surface, due to the prevailing steep grades and potential for wet weather. The lump sum contract price paid for Trench Shoring and Plating shall include all costs relating to trench safety and shoring of excavations including, temporary steel plating, temporary AC paving, all cost for obtaining said permit from the Division of Industrial Safety as described herein and all costs for additional customized structural calculations required by the contemplated improvements, and no additional allowance will be made therefor. No additional payment will be made as a result of revisions required in the trench support details, due to a type of soil encountered which requires a method of trench support different from that approved or due to other unforeseen reasons. The price per linear foot for RCP pipe in place shall be considered full compensation for the removal of interfering portions of existing storm drains and improvements; the closing or removing of abandoned conduit and structures; the excavations of the trench including temporary resurfacing; the control of ground and surface waters; the preparation of subgrade; potholing; placing and joining pipe; bedding and backfill; Post CCTV Inspection; providing as-built plans and all other work necessary to install the pipe, complete in place. NOTE: Permanent roadway pavement section is paid for under the AC Pavement Base Course and AC Pavement Surface Course (2% latex) bid items. 40