Laserfiche WebLink
• The well drilled and constructed by the Consultant will be located near an existing high- <br />capacity well and will be used to collect data from an aquifer pumping test from the operation <br />of the high-capacity well. The location of the well constructed under this Task will be <br />dependent on cooperation of owners of the high-capacity wells, on the existence of data gaps, <br />and on the well construction characteristics of candidate high-capacity wells. <br />• The well drilled by the Consultant will be located on public right-of-way and accessible for <br />the duration of the drilling and monitoring. The well installation site will be selected that does <br />not require grading for road construction or drilling. The State will be consulted if a suitable <br />location for drilling cannot be found on a public right of way. <br />• The approved site location will be staked in the field and cleared for drilling by a commercial <br />utility locating service. <br />• The Consultant will apply for a monitoring well permit on behalf of the CWCB as owner, and <br />will prepare a bid package consisting of well design, technical specifications, and contract <br />documents for well drilling, sampling, logging, testing, and completion. As determined in <br />Phase 1, no well permit fees are expected. <br />� Well drilling and installation will be sub-contracted to a drilling contractor who is qualified <br />for this work in the State of Colorado, with oversight provided by a registered Colorado <br />professional engineer or a professional geologist according to CRS 34-1-201(3). Well <br />contractors submitting bids on the work will be required to obtain a performance bond for the <br />well construction work. <br />• Drilling will commence when access is available to cost-effectively implement a field <br />mobilization, and when weather conditions are suitable. <br />� Drilling is expected to be with mud rotary drilling techniques. <br />• Costs for this task assume that the well will be up to 740 feet in depth and will be completed <br />in the same bedrock aquifer that is screened by the adjacent high-capacity well. <br />• Sample collection will not commence until unweathered bedrock is reached. The uppermost <br />25 feet of the bedrock formation will be cored using a nominal 2-inch or greater core barrel. <br />The borehole will then be reamed and advanced to the target aquifer using a rotary bit, with <br />cuttings descriptions used to define the geology. <br />• Core samples up to 10 feet in length will be collected from the uppermost aquifer and from <br />the target completion depth of the well, as identified by the onsite field geologist or engineer. <br />• At the completion of drilling, a suite of geophysical logs including, at a minimum, resistivity, <br />natural gamma and spontaneous potential will be run to assist in hydrostratigraphic <br />characterization. <br />• Materials encountered in each borehole will be visually classified and described by a qualified <br />geologist or engineer from the drill cuttings. <br />SPDSS Groundwater SOW, Phase 2 9 <br />