Specifications include, but are not limited to: improvements to the park and pond at Westside Park in Yankton. Improvements include pond regrading, an updated outlet structure, riprap bank stabilization, retaining walls, concrete sidewalks, an updated pedestrian bridge, seeding, and landscaping in the project limits, as well as other work as identified in the technical drawings.; A. The Pile Contractor shall furnish all materials, labor, services, equipment and shall install and cut off all piles at the locations and depths shown on the drawings or as otherwise directed by the Owner's Geotechnical Engineer. The piles shall be installed to have minimum working capacity as indicated in the General Notes on the drawings. The Piles shall be free of all defects or other anomalies that could adversely influence pile performance.; B. The Pile Contractor shall furnish all materials and labor as required to perform the load tests as specified herein and on the drawings.; C. The General Contractor shall provide all necessary excavation, sheeting and bracing or other adequate maintenance of excavation banks, suitable runways and ramps as necessary for pile driving, control of ground and surface water as necessary to keep the work area sufficiently dry, suitable access roads for movement of equipment and materials to and from pile locations, field layout required for pile work including setting and maintaining a location stake for each pile and giving cut-off grades on all piles, and removal of all overhead and underground obstructions as required. ; DRIVING PILES: A. General: Continuously drive piles at locations indicated to required minimum point elevation and extend them thereafter until driving resistance established by driving and loading of test piles has been attained.; 1. Carefully maintain center of gravity for each group or cluster of piles to conform to locations shown on drawings.; 2. Carefully plumb leads and pile before driving. Take care during driving to prevent and to correct any tendency of piles to twist or rotate.; 3. When handling and driving long piles, take special precautions to ensure against overstress or leaning away from a true position when driving.; B. Driving Tolerances: Drive piles within following maximum tolerances: 1. Location: 3" from location indicated for center of gravity of each single pile or pile groups; 1" for piles under walls.; 2. Plumbness: Maintain 1" in 10'-0" from vertical, or a maximum of 4", measured when the pile is above ground, in leads.; 3. Batter Angle: Maximum 1" in 10'-0" from required angle; measured when pile is above ground, in leads.; C. Pre-Excavating (Coring): Provide pre-excavated holes for piles driven within 15'-0" of structures or underground utilities where located, and to depths shown on drawings. Drill holes with a diameter equal to 80% or less than largest cross-section dimension. Exact size and depth shall be as required to produce satisfactory driving results as determined by Owner's Geotechnical Engineer. Backfill voids between pile and pre-excavated hole, using satisfactory soil materials.; D. Jetting: Piles may not be driven with aid of water jets unless authorized by Owner's Geotechnical Engineer. Guidelines for jetting shall be established by the Owner's Geotechnical Engineer.; E. Heaved Piles: Provide recorded instrument observations made during pile driving to determine whether driven pile has lifted from its original seat during driving of adjacent piles. If uplift occurs, redrive affected piles to point elevation at least as deep as original point elevation with a driving resistance at least as great as original driving resistance or as otherwise directed by the Owner's Geotechnical Engineer.
