The Contractor shall be responsible for providing all labor, materials, equipment, tools, transportation, and incidentals necessary to complete the following work items: 6.1. Westside Bridge Wall Repair and Restoration 6.1.1. Selective Stone Removal and Resetting: 6.1.1.1. Carefully identify and remove loose, damaged, or deteriorated stone sections from the westside bridge wall as directed by the City’s representative. The Contractor shall exercise extreme caution to avoid further damage to surrounding stonework. 6.1.1.2. Clean and prepare the existing stone and the underlying substrate for resetting. 6.1.1.3. Reset any loose stone sections securely using new structural cement mortar that matches the color, texture, and joint profile of the original mortar. 6.1.1.4. Repoint any damaged or deteriorated mortar joints at all sides of the bridge 6.1.1.5. Reset the removed stone sections securely using new Portland cement mortar that matches the color, texture, and joint profile of the original mortar. 6.1.1.6. Dispose of any unusable stone debris in accordance with applicable regulations. 6.1.2. Existing Concrete Coping Removal (Westside): 6.1.2.1. Carefully remove the existing concrete coping along the entire 23-foot length of the westside bridge wall. The Contractor shall take precautions to prevent damage to the underlying stone structure during the removal process. 6.1.2.2. Dispose of the removed concrete coping off-site in an environmentally responsible manner. 6.1.3. New Concrete Coping Installation (Westside): 6.1.3.1. Furnish and install new concrete coping with approximate dimensions of 4 inches thick by 24 inches wide by 23 feet long on the westside bridge wall. 6.1.3.2. The new concrete coping must be properly reinforced with no. 6 x no. 6, 6” welded wire mesh it is typically specified at 60,000 psi, and securely anchored using #4 epoxy rebar dowels with a 1.5” min embedment to the underlying stone structure. 6.1.3.3. The new concrete coping must be properly reinforced and securely anchored to the underlying stone structure. 6.1.3.4. The finish and color of the new concrete coping must be approved by the Department's representative to ensure aesthetic compatibility with the historic bridge. 6.1.4. Repointing (Westside): 6.1.4.1. Thoroughly inspect all mortar joints on the westside bridge wall. 6.1.4.2. Carefully remove loose, cracked, or deteriorated mortar to a depth appropriate for effective repointing. 6.1.4.3. Repoint all identified areas, and any other areas deemed necessary by the City’s representative, using new Portland cement mortar that matches the color, texture, and joint profile of the original mortar. Ensure a watertight seal. 6.2. Eastside Bridge Wall Repair and Restoration 6.2.1. Existing Concrete Coping Removal (Eastside): 6.2.1.1. Carefully remove the existing concrete coping along the entire 23-foot length of the eastside bridge wall. The Contractor shall take precautions to prevent damage to the underlying stone structure during the removal process. 6.2.1.2. Dispose of the removed concrete coping off-site in an environmentally responsible manner. 6.2.2. New Concrete Coping Installation (Eastside) 6.2.2.1. Furnish and install new concrete coping in sections of 24” x 48” x 4” thick (measurement to be verified in field) x 23 feet long on the eastside bridge wall.
