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INDIAN RIVER COUNTY MITIGATION REEF PROJECT TECHNICAL AND ENVIRONMENTAL SPECIFICATIONS schedule shall show the various activities of work in sufficient detail to demonstrate that the CONTRACTOR has a reasonable and workable plan to complete the project within the contract period . The schedule shall show the order and interdependence of activities and the sequence in which the work is to be accomplished as planned by the CONTRACTOR. All activities shall be described so that the work is readily identifiable and the progress on each activity can be readily measured . Each activity shall show a beginning work date and the work duration . Activities shall include procurement time for materials and equipment, where they are appropriate and essential to the timely completion of the project. The list of activities shall include milestones , when required by the Plans or the Contract Documents , The Gantt chart shall also identify the beginning and end of Marine Turtle Nesting Season . The schedule will be reviewed by the COUNTY prior to the start of construction and will become part of the Contract Documents . If the schedule submitted is determined to be inadequate by the COUNTY, it will be returned to the CONTRACTOR for correction . The CONTRACTOR shall have five (5 ) calendar days from the date of transmittal of the document to the CONTRACTOR by the COUNTY to submit a corrected schedule . When accepted , this schedule will constitute the baseline against which progress will be measured . The CONTRACTOR shall submit an updated Work Progress Schedule when requested by the COUNTY. If revisions are required to the working schedule , the CONTRACTOR shall furnish revised bar graphs (Gantt Chart) and schedule within five (5 ) calendar days subsequent to notification by the COUNTY. Failure to finalize either the initial or a revised Work Progress Schedule in the time specified will result in the withholding of all contract payments until the Work Progress Schedule is accepted by the COUNTY. 12 . MATERIALS REQUIRED Two types of mitigation reef shall be constructed ; High Relief High Complexity (HRHC ) (Section 17 . 11 ) and Low Relief Low Complexity ( LRLC) (Section 17 . 12 ) . Materials to construct the High Relief High Complexity ( HRHC ) and the Low Relief Low Complexity ( LRLC ) reef shall consist of limestone or coquina boulders as shown in the Plans . Material should be inspected prior to loading onto trucks or work barges and should be clean , free of excessive soil , plant material , steel , or other pollutants or protruding material . If washing of material is necessary to remove excess debris from the limestone or coquina boulders , washing of material shall occur prior to material loading onto trucks for initial weighing . As needed , additional washing at the staging area shall take place prior to loading onto barges to ensure clean material . CONTRACTOR shall be responsible for retaining all wash water on -site per Section 19 . 5 . 1 . 12 . 1 Contract Material . All material shall consist of limestone or coquina boulders comprised of natural limestone or coquina . Material shall be hard , dense , and durable , and within specified limits of size . Material shall have a minimum unit weight of 135 Ibs/ft3. All material shall be roughly angular, free of cracks , soft seams , and other TS-6