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HomeMy WebLinkAbout9 Prosser Village Well Drilling Agenda Item # Memorandum To: Board of Directors From: Ed Taylor, Water Utility Manager Date: August 15, 2003 Subject: Authorization to bid for the Prosser Village Production Well Drilling and Pumping Test Programs. 1. WHY THIS MATTER IS BEFORE THE BOARD Board authorization is required to advertise for, accept and open bids for the Prosser Village Production Well Drilling and Pumping Test Programs 2. HISTORY The District drilled exploration test wells prior to the development of Martis Valley Well #1. One of these sites is in the Prosser Village area (formerly known as Featherstone). The results of the exploration well proved to be positive with regards to water quality and potential productivity. At that time, District staff did not recommend drilling a production well, because Transmission piping was not available to utilize the source. With the Development of Old Greenwood and Gray's Crossing, sufficient transmission will be available to convey this source into the central District area. 3. NEW INFORMATION The plans, specifications, and contract documents for the Prosser Village Production Well Drilling and Pumping Test Programs are complete. We are now asking authorization to advertise for, accept, and open bids for the Prosser Village Production Well Drilling and Pumping Test Program with a bid opening date of September 11, 2003. 4. RECOMMENDATION I recommend that the Board authorize staff to advertise for, accept, and open bids for the Prosser Village Production Well Drilling and Pumping Test Programs with a bid opening date of September 11, 2003. 0 Page 1 Agenda Item # iI Dist.rict Memorandum To: Board of Directors From: Ed Taylor Date: 8/15/03 Subject: Consideration of proposal from Aqua Hydrogeologic Consulting to provide supervision and documentation during the Prosser Village production well drilling and pumping test programs 1. WHY THIS MATTER IS BEFORE THE BOARD The District previously identified a location for a water production well. The District staff has determined that this is the appropriate time to develop the source. 2. HISTORY The District drilled exploration test wells prior to the development of Martis Valley Well #1. One of these sites is in the Prosser Village area (formally known as Featherstone). The results of the exploration well proved to be positive with regards to water quality and potential productivity. At that time, District staff did not recommend drilling a production well, because Transmission piping was not available to utilize the source. 3. NEW INFORMATION With the Development of Old Greenwood and Gray's Crossing, sufficient transmission will be available to convey this source into the central District area. District staff requested a proposal from Aqua Hydrogeologic Consulting to supervise and document the drilling and pumping test programs of the Production Well as further outlined in the attached proposal. 4. RECOMMENDATION I recommend that the Board approve the proposal from Aqua Hydrogeologic Consulting for supervision and documentation during the Prosser Village production well drilling and pumping test programs in an amount not to exceed $78,870.00. x, X. r. July 21, 2003 Mr. Ed Taylor Water Utility Manager Truckee Donner Public Utility District 11570 Donner Pass Road Truckee, CA 96160 RE: Scope of Work and Cost Estimate for Hydrogeologic Consulting Services for the supervision and data collection during the Prosser Village production well drilling and pumping test programs Dear Ed: 1 am pleased to present this scope of work and cost estimate for the supervision and data collection during the drilling and construction of the proposed Prosser Village production well and subsequent pump development and pumping tests. The following summarizes the proposed work plan; a detailed scope of work and cost estimate follows the summary. • Prepare and submit paperwork to Lahontan for the waste discharge permit waiver. • Work together with TDPUD personnel in the development of the contractors bid document and selection of the well drilling contractor. • Provide on-site supervision and data collection during the drilling of the proposed production well. • Provide on-site supervision and data collection during the pump development and pumping test program. • Evaluate data collected from the drilling and pumping tests programs. • Prepare the report summarizing all activity and 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 task and a cost estimate to perform the described work. Scope of Work Task I During Task 1, AquA will prepare and submit to Lahontan the application for the waste discharge permit waiver. As part of the preparation a site visit will be conducted for the purpose of photographing the well-site and detention facility for the pumping test water. After the submittal of the paperwork to Lahontan, AquA will track the process and take care of questions as they arise. P.O. Box 18793 • Reno Nevada 89511 0 (775)250-9700 9 Fax(775)841-0946 s DavidECarlson©msn.com Also as part of Task 1, AquA will put together the drilling and pumping tests bid documents and provide the documents to the TDPUD to be sent out to qualified drilling and pumping contractors. A pre-bid meeting has been scheduled and AquA will attend that meeting to answer questions regarding the drilling and pumping programs. A site visit is also scheduled and AquA will be there to answer questions. After the completed bids are returned to the TDPUD, AquA will help evaluate both the drilling and pumping bids and provide a recommendation to TDPUD for each of the two bids for their consideration. Task 2 AquA personnel will provide field supervision and data collection during the drilling and construction of the production well. These activities will include geologic logging of the borehole to its proposed depth of 960 feet, accounting for drilling material used, recording drill rig activity, logging the time of the drilling to determine penetration rates, and evaluation of downhole geophysical survey. After the drilling activity is completed, AquA personnel will be on-site during the construction of the well to ensure the well design is followed per specifications. During air-lift development data will be collected during each phase of development to ensure the well is developed as completely as possible using the air-lift technique. After the sir- lift development phase is completed and the well-bore is clean AquA will oversee the plumbness test to be conducted on the well-bore and the downhole video survey. Task 3 This task will involve providing on-site supervision and data collection during the pump development program and the pumping tests which will be conducted on the production well. Specifically data will be collected during the stage pump development to ensure and each 20-foot section of the well-bore is developed as much as possible. After the pump development is completed, a step-drawdown test will be conducted to determine well efficiency and the pumping rate to be used during the constant-discharge test. The constant-discharge will involve pumping the well for 72-hours while monitoring the water level both at the production well and the nearby Featherstone monitoring well. After the pumping period is completed, water levels at both locations will be monitored during the recovery period. Task 4 This task involves summarizing all of the activity and data collection that was completed under Tasks 2 and 3. In addition, the report will contain data analysis and recommendations regarding the production potential for the production well. Finally, aquifer parameters that are developed from pumping test analysis will be put into the regional ground water flow model to determine impacts both locally and on a regional scale. A cost estimate for the previously described tasks is included on the following page. Cost Estimate Task 1 Permitting and Bid Documents activity Senior Hydrogeologist 48 hrs @ $90/hr $4,320 Technician 8 hrs @ $65/hr 520 Total $4,840 Task 2 Well Drilling Supervision and Data Collection Senior Hydrogeologist 64 hrs @ $90/hr $5,760 Project Geologist 210 hrs @ $70/hr 14,700 Field Technician 182 hrs @ $65/hr 11,830 Per diem (15 days at$115/day/person) 3,450 Vehicle expense (15 days at $40/day/vehicle) 1,200 Total $36,940 Task 3 Pumping development and testing Senior Hydrogeologist 48 hrs @ $90/hr $4,320 Project Geologist 112 hrs @ $70/hr 7,840 Field Technician 112 hrs @ $65/hr 7,280 Per diem (8 days at $115/day/person) 1,840 Vehicle expense(8 days at $40/day/vehicle) 640 Total $21,920 Task 4 Evaluation and Reporting Senior Hydrogeologist 60 hrs @ $90/hr $5,400 Graphics Designer 40 hrs @ $65/hr 2,600 Total $8,000 Sub-Total $71,700 Contingency 10% $7,170 Project Total $78,870 If you have any questions regarding this proposed scope of work and cost estimate,please contact me at (775) 250-9700. Sincerely, David Carlson