Specifications include, but are not limited to: A. This work shall include removal of existing sidewalk, replacement of sidewalk and detectable warnings (as needed). Once the sidewalk has been removed it is the Contractor’s responsibility to barricade the work area until the concrete work is completed. The Contractor is responsible for providing and placing barricades. Any open slabs shall be completed within two weeks of the removal. Removal will not be measured for payment. B. Method of Measurement The concrete services will be measured in square feet. C. Materials i) The Contractor shall remove the existing sidewalk and sufficient sub-grade to allow for placement of two inches (2") of approved ca-6 crushed stone or crushed gravel on a compacted sub-grade. Replacement shall include the installation of Portland cement concrete sidewalk to a minimum thickness of five inches (5") and thickened to six inches (6") across driveways, and two inches (2") of ca-6 sub-base under the new sidewalk where unsuitable materials are found, and as directed by the engineer. If a filling is required in the sidewalk subgrade, it shall consist of placing and compacting an approved granular material to the satisfaction of public works as incidental. ii) The Contractor shall use high early strength concrete for sidewalk replacement at the location of the driveways at no additional cost to the contract. The Contractor shall fill the voids created by the removal of the sidewalk at the location of the driveways with crushed aggregate so that the residents can use their driveways until the start of sidewalk replacement operations. iii) At sidewalk ramp locations side curbs or flares may be required to meet ADA requirements. When a flare or curb is constructed it shall meet the three-foot (3’) minimum curb transition. iv) This work will be paid for at the contract unit price per square foot for sidewalk removal/replacement. v) No stamps advertising the Contractor, construction companies, or other privacy concerns shall be placed in the concrete. vi) Where a new sidewalk or curb meets the existing sidewalk or curb, they shall be connected with two 5/8” diameter reinforcing bars, twelve inches long. Holes 5/8” in diameter shall be drilled six inches into the existing concrete. Expansion joints shall also be used where the new concrete meets the old. Include in cost of sidewalk removal/ replacement. D. Detectable warnings i) This work shall consist of the installation of the pre-fabricated replaceable panel of truncated domes twenty-four inches (24”) wide and forty-eight inches (48”) in length on concrete sidewalk accessibility ramps at locations as directed by the engineer. ii) Truncated domes shall be in accordance with article 424.09 of the standard specifications. The domes shall parallel the pavement crosswalk in accordance with the latest highway standard. The panel shall be red. The panel shall meet the requirements of ASTM c1028 – slip resistance and ASTM g155 – accelerated weathering. iii) The cost for detectable warnings shall be included in the sidewalk removal /replacement where needed. Refer to exhibit a for locations