Is drilling allowed for the large diameter concrete pile option?
Please see addendum #1. 47. For clarity we recommend that Mobilization-Item 127 be moved to the common items 1-79 so that a bidder not bidding alternate 3 also has a Mobilization item to bid. Please see response to Inquiry #16 and Addendum #1. Bid Items 84 and 99-Structural Concrete-Bridge are both fixed bid items though they contain payment for pile fill which is variable depending on the pile alternate the contractor chooses to drive. (CISS or Precast) The concrete quantity could vary 11-15%. The concrete fill in the PC/PS option is not included in the structural concrete, bridge quantities shown in the Engineer’s Estimate for Alternative 1 and 2. Please see addendum #1. 48. Special Provisions, Page 122, Installation (of piles) says, in part: “the Engineer will consider jetting…when drilling through the center of piles is not feasible because the pile is so far above the specified tip elevation.” How far above specified tip elevation would the pile have to be for this to be conside
