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Home My WebLink About9 Aqua Hydrogeolic Consulting Memorandum To: Board of Directors From: Ed Taylor, Water Superintendent Date: 10/10/01 Subject: Consideration of proposal from Aqua Hydrogeologic Consulting to provide hydrogeologic services in locating new well sites. BACKGROUND: In July of 2000, the Board approved a contract with Nimbus Engineering for hydrogeologic services. David Carlson was the project manager from the Nimbus staff, which provided the services to locate and drill a new well. We located and drilled a very good well. David Carlson has started his own company, Aqua Hydrogeologic Consulting, and staff is recommending that we continue the Districts relationship with David Carlson. Staff recommends that a contract be approved in the amount not to exceed of$30,360 with Aqua Hydrogeologic Consulting to locate future well sites per the attached proposal. RECOMMENDATION: 1 recommend that the Board approve the proposal from Aqua Hydrogeologic Consulting for hydrogeologic services in the amount not to exceed of$30,360 for work to locate a new water supply and authorize the execution of an agreement for the proposed services. Attached:Aqua Hydrogeologic Consulting Proposal • Page 1 -A'- ouA Hydrogeologao Consul ling September 12, 2001 Mr, Ed Taylor Water Superintendent Truckee Donner Public Utility District 11570 Donner Pass Road Truckee, CA 96160 RE: Hydrogeologic Consulting Services for development of geologic/hydrogeologic model for three exploration well-sites Dear Ed: As per your request of September 5, 2001, 1 am pleased to present this scope of work and cost estimate for the development of a geologic/hydrogeologic model for the prospective exploration drill- site areas that are proposed north of I-80. The following summarizes the proposed work plan, a detailed scope of work and cost estimate follows the summary. • Review existing data and reports, develop geologic cross-sections through the study area. • Conduct surface geophysics through study area Refine geologic model of study area with inclusion of surface geophysics. • Evaluate Featherstone well-site area for production potential • Prepare report summarizing all activity containing findings and recommendations. The above is a brief summary of the activity to be covered under this proposed scope of work. The following is a more detail summary of each proposed tasks and a cost estimate to perform the describe work. Scope of Work Task 1 Assemble and review the existing reports and other information needed to develop a geologic and hydrogeologic understanding (model) of the study area. This work will cover the area north of I-80 and the Featherstone area. Develop preliminary geologic cross- sections of the study area. These cross-sectional lines will be both east-west and north- south. It is anticipated that the final product of this task will be a preliminary map showing the geologic layers which exist and approximate thickness. The work covered under this task will be modified during Task 3. Task 2 Oversee field efforts of the surface seismic geophysical program. It is anticipated that this program will require a total of approximately 10,000 to 12,000 feet of surface lines. I have t time just the e present ro osed lines. At th ma which shows the P J atopographicP P includedp two east-west lines are proposed. Both Jim Cooksley and myself think that the geologic P.O. Box 18793 • Reno Nevada 89511 e (775)250-9700 a Fax(775) 841-0946 . DavidECarlson@msn.com V data and profile information that is collected from these two survey lines will be sufficient to help establish the geologic cross-sectional model for this area. I have been in contact with Jim and he discussed a cost of$7.50/foot if he has to provide equipment to drill the shot holes. If this equipment and service is provided by TDPUD, the proposed cost for the surface geophysical survey would be $6.00/foot. For costing purposes a survey length of 11,000 feet was used. If Cooksley did everything, estimated cost would be $82,500. If the TDPUD drilled the shot holes, estimated cost would be $66,000. Task 3 This task will involve incorporating the geophysical survey data into the geologic/ hydrogeologic cross-sections that were developed during Task 1. These new cross- sections will include a geologic profile (thickness) of the alluvial and basalt material. It is anticipated that with this information the upper zone may be cemented off during production well construction so that the shallow aquifer will not be impacted by the removal of ground water from the lower zone. This geologic understanding is critical for future potential permitting issues. Task 4 In this task, a detailed analysis of the ground water yield potential at the Featherstone exploration well-site will be undertaken. Findings, recommendations, and yield potential regarding a production well at this location will be covered and included in the final report. Task 5 This task will summarize in a report all of the activity that was completed in Tasks 1 through 4. In addition this report will contain the geologic cross-sections(model) of the study area, along with a summary of findings and recommendations for the study area. Cost Estimate Task 1 Data Collection and Review $6,800 Senior Hydrogeologist 80 hrs @$85/hr Technician 16 hrs @$55/hr 880 Total $7,680 Task 2 Geophysical Survey $2,040 Senior Hydrogeologist 24 hrs @$85/hr Field Technician 80 hrs @$55/hr 4,400 Total $6,440 Task 3 New Geologic Model $2 720 Senior Hydrogeologist 32 hrs @$85/hr Graphics Designer 16 hrs @ $65/hr 1,040 Total $3,760 Task 4 Featherstone Evaluation 2 040 Senior Hydrogeologist 24 hrs @ $85/hr $2,040 Total $2,040 Task 5 Report $6 800 Senior Hydrogeologist 80 hrs @$85/h 880 Graphics Designer 16 hrs @ $65/h Total $7,680 Sub-Total $27,600 Contingency 10% $2,760 Project Total $30,360 Because of the urgency of this program, AquA is prepared to commence work immediately upon authorization to proceed. If you have any questions regarding this letter, the scope of work, cost estimate, or the map attachment, please contact me at (775)250-9700. Sincerely, AquA Hydrogeologic Consulting David Carlson attachment: map f � 3 ` a ersto a Exploration II S x " ------------- 74 r i r ak .�. 3 ' • 'a -- .f 2�� I yPal�dt I ire Orive Product el(