Specifications include, but are not limited to: 2.1. Contractor shall perform up to twenty (20) shallow underwater test borings. This item shall include all mobilization/demobilization, labor, materials, equipment, and services necessary to perform test borings as described below. 2.2. Access: All boring locations are expected to be in shallow water, up to 10 feet of depth, to lake bottom and 85 ft from the lake shore, so use of a boat or barge is expected. Contractor will be expected to subcontract the appropriate vessel, as needed, to complete the borings if they do not have the appropriate equipment in their inventory. 2.3. Scope: Up to twenty (20) test borings to varying subbase depths (maximum 6 ft) or refusal shall be completed in the locations as-shown on the attached Proposed Boring Locations Plan. This boring plan is to determine depth to bedrock/ledge in the vicinity of the proposed boat access ramp improvements. The plan lays out 17 boring locations, with provision in the contract for an additional 3 borings, if deemed necessary. The goal of the site investigation is to determine if bedrock/ledge exists within the depths of proposed excavation area necessary to install the proposed ramp improvements and potential categorization of lake bottom material. The profile of proposed improvements in relation to Ordinary High Water (98’ ASL) and Ordinary Low Water (93’ ASL) are shown in the profiles provided on the Proposed Boring Locations Plan. Actual water level at the time of borings shall be verified to define minimum depth of bore required in each location to assure the appropriate depth is achieved. 2.4. A State representative will be on site to discuss boring plan and make adjustments in the field, as necessary, to location or depth depending on conditions found. The Contractor shall provide an experienced drilling foreman and other personnel necessary to perform the work in an efficient manner. 2.5. Cost proposals are requested for 1) Blind Point Push Methods using direct push or hammer equipment with no collection of intersected material, and 2) Direct Push Drilling methods suitable for collection of samples to categorize nature of material intersected to the point of refusal. These shall be separate cost proposals to assess differences for consideration by the State. 2.6. Technical Specifications of Test Boring Program: Drilling and Sampling shall be performed in accordance with industry standards for ledge probes, boring and coring. 2.7. Proposals shall include detailed descriptions of methods to be used for each cost scenario. Additionally, proposals shall also include any costs associated with this work that they wish to have included for consideration by the State. 2.8. The Contractor shall take care to minimize transport of turbid water from the locations of each boring to the extent practical.
