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4. Construction Procedure a. General: When the work is to be performed under traffic, each lane shall be completed in segments, the lengths and limits of which shall be approved by the County. The County may limit the length of the work zone to avoid causing a traffic hazard or undue delay. Before commencing the reclaiming operations, the Contractor shall set alignment stakes (laths) at intervals of 200 feet or less on both sides of the road, offset at least 4 feet from the proposed edge of pavement for use in preparing the base and placing the new pavement. The setting of laths shall be in addition to any other markers or reference points required under the Contract, and the placing of surveying markers or other references elsewhere shall not substitute for the required laths along the existing pavement. Prior to beginning work, the Contractor shall relocate all mailboxes, newspaper boxes, signs, and other appurtenances which are located within such proximity to the roadway as to risk damage or to interfere with the work. Before this work may begin, residents and businesses shall be notified of the impending work by means of portable changeable message signs (PCMS). After all other work items are complete, the removed items shall be replaced in their original locations, except that the distance from the proposed edge of pavement shall be as prescribed by County requirements or guidelines. b. Reclaiming: The Contractor shall pulverize the existing pavement in multiple passes of the reclaimer, applying sufficient mechanical effort to reduce the fragments to a maximum size of 3 inches. In this process the pulverized material shall be combined uniformly with the base and subgrade to a depth specified in the Contractor's Mix Design. Following the reclaimer, a roller shall be applied to compact the blended material sufficiently to support traffic temporarily. The County requires removal of approximately 2-1/2 in of pulverized material prior to addition of the stabilizing agent. When the pulverizing and mixing step is complete, the material shall be graded, watered, remixed, shaped, and compacted as necessary to establish proper grade and uniform thickness and to support traffic temporarily. Water shall be applied if necessary to obtain uniform moisture content as required by the Contractor's Mix Design. The Contractor shall apply additional water at frequent intervals as needed to suppress dust, preserve the surface, and maintain the specified moisture content. The stabilizing agent shall then be applied and mixed to the depth specified by the County, and grading and compaction of the combined base material shall proceed immediately behind the mixing of the stabilizing agent. Before final grading and the addition of the emulsion, the Contractor shall adjust the cross -slope, super elevation, and profile grade by adding granular base material as required to provide the required grade and cross slope for the road, or removing material. c. Compaction: The Contractor may employ other compaction equipment and methods in addition to the vibratory roller to accomplish the final grading and to compact and finish the surface. Transverse joints shall be compacted by cross rolling parallel to the joint. After the material has been compacted to load-bearing strength, the Contractor shall proof -roll the prepared base in the presence of the Inspector. The County may, as it deems necessary, direct the Contractor to correct areas of weakness and excess moisture in the base by scarifying, aerating, and reworking shore sessions to the full depth of the layer. If, after an area has been reworked and recompacted, it remains soft or does not attain the required density, 01025-19 Technical Specifications F:\Public Works\ENGINEERING DIVISION PROJECTS\1362-OId Dixie Hwy_Highland Dr\1-Admin\Bid Documents\Master Contract Documents\Technical Specifications.doc