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HomeMy Public PortalAboutResolution 2020-09-10 Authorizing Expenditure for Water System well Rehab for Fraser QWells 2, 7 and 9 TOWN OF FRASER RESOLUTION NO. 2020-09-10 A RESOLUTION AUTHORIZING THE EXPENDITURE FOR THE WATER SYSTEM WELL REHABILITATION SERVICES FOR THE FRASER WELLS 2,7, AND 9. WHEREAS, the 2020 Budget provides for certain water system projects. THEREFORE, BE IT RESOLVED BY THE BOARD OF TRUSTEES OF THE TOWN OF FRASER, COLORADO THAT: 1. The Town Board of Fraser, Colorado hereby authorizes the Town Manager to expend up to $82,574.00 for Colorado Water Well to clean, rehabilitate, and equip three wells within the Fraser well field. 2. Said purchases must be completed by the end of November 2020 or the approval will no longer be effective. READ, PASSED ON ROLL CALL VOTE, AND ADOPTED BY THE BOARD OF TRUSTEES THIS 16th DAYOFSEPTEMBER, 2020. Votes in favor: 7 BOARD OF TRUSTEES OF THE Votes opposed: 0 TOWN OF FRASER, COLORADO Abstained: 0 Absent: dBY: � C Mayor W.- ,0 OF F/;61S� ATTEST: AL) A SEALaNA-Gtm�uv1� Town Clerk -0/.0 RAO- Town of Fraser PO Box 370, Fraser, CO 80442 office 970-726-5491 fax 970-726-5518 www.frasercolorado.com MEMO TO: Mayor Vandernail and the Board of Trustees FROM: Adam Cwiklin, Water and Wastewater Superintendent and Russell Pennington, P.E., Public Works Director DATE: September 9, 2020 SUBJECT: Staff Report PW: Water System flowmeter upgrades SUBJECT: CONSENT AGENDA Consideration of A Resolution Authorizing Town staff to contract with a well pump company to initiate an annual well maintenance program and award a contract Colorado Water Well for well cleaning, rehabilitation, and equipping Fraser wells 2,7 and 9 in The Amount of $68,687.00 and a Contingency amount of $13,737.00 for a total of $82,574.00 DEPARTMENT: Public Works PRESENTER: Russell Pennington, Public Works Director Adam Cwiklin, Water and Wastewater Superintendent FISCAL INFORMATION: Cost as Recommended: $ 82,574 Balance Available: $ 145,755 Fund: Water Budget Line Item Number: 50-40-460 New Appropriation Required: No REQUESTED ACTION: Approve the Resolution to award said contract, authorize the appropriate Town officer to execute said contract, and authorize Staff to expend contracted funds and contingency funds. SUMMARY AND BACKGROUND OF SUBJECT MATTER: The Town of Fraser has never had a routine testing and maintenance program for it wells. Fraser is growing, and Staff anticipates that the town will need to further develop its water rights to meet demands in the future. Prior to adding additional wells or well fields, it is recommended that the Town assesses and optimize production from its current wells and then maintain the wells at optimal levels moving forward. Town of Fraser PO Box 370, Fraser, CO 80442 office 970-726-5491 fax 970-726-5518 www.frasercolorado.com The 2020 Water Capital Budget has funds appropriated for a well cleaning, maintenance and rehabilitation activities. Staff anticipated rehabilitating 2 wells in 2020, but well assessment reports recommend three. Moving forward, Staff anticipates this to be an annual funding request in order to preform and/or contact for well testing and maintenance activities on an annual basis. PROJECT SUMMARY BUDGET Contract $68,687.00 Contingency (20%) $13,737.00 Total $82,574.00 The quote for the project is $67,460.00. The project funding includes contingency amounts amount of $12,540.00 for a total of $80,000.00 which can be used towards unforeseen changes during installation and programing. See attached quote for details. PROJECT SCHEDULE Notice of Award September 17, 2020 Maintenance completion November 30, 2020 ATTACHMENTS: a. Resolution b. Well reports c. Quote STAFF RECOMMENDATION: Motion to approve Resolution No. 2020-09-10 authorizing the Town Manager to contract Colorado Water Well for well cleaning, rehabilitation, and equipping Fraser wells 2,7 and 9 using the System Repair and Maintenance - Production Account (50-40-460) of the 2020 Water Fund in an amount not to exceed $82,574. Page 1 of 18 Fraser Wellfield Evaluation Report – August 17, 2020 COLORADO WATER WELL 2001 E. 58th AVE. DENVER, CO. 80216 COLORADO WATER WELL 2001 E. 58th AVE. DENVER, CO. 80216 (303) 892-9053 FAX 303-892-1924 August 17, 2020 Adam Cwiklin Town of Fraser 153 Fraser Avenue Fraser, Colorado 80442 Re: Fraser Wellfield Evaluation – DRAFT REPORT Dear Mr. Cwiklin: We have completed the testing for Fraser Wells 1,2, 3B, 5R, 7 and 9 and have prepared this final report after discussing draft information with you and your staff. The report included evaluating the following information 1. Megger and check electrical resistance of downhole cable and motors 2. Amperage 3. Flow (gallons per minute or GPM) – instantaneous and totalizer 4. Power consumption 5. Discharge pressure 6. Water levels (from Fraser SCADA system) We coordinated all inspection and testing with Fraser Staff, primarily yourself and Mr. Nick Rardin. This letter report provides testing results, baseline data and recommendations for improving capacity and reliability for water production from all wells that were tested. It should be used as a baseline report for prioritizing maintenance and well work at the Fraser wellfield. Page 2 of 18 Fraser Wellfield Evaluation Report – August 17, 2020 COLORADO WATER WELL 2001 E. 58th AVE. DENVER, CO. 80216 Fraser Well No 1 Meggger: Lead and motor measurements indicates that the motor and cable are in good condition: Lead to lead resistance = 0.8 to 1.0 ohms Lead to ground resistance = ∞. Amperage: Running amperage average was 20.8 and average line voltage was measured at 138.7. Amps and volts were relatively stable throughout the test and electrical readings indicate that the motor is in good condition. Flow: Testing indicated that Well 1 was producing at a rate of between 126 and 131 GPM. Test meter accuracy and installed meter accuracy had a variance of 3.97%, which is good. Discharge Pressure: Pressure measured at the building was 5 PSI and the estimated total dynamic head was 90’. Water Level: The water level measurement appears to be incorrect. Static water level was approximately 64’ above the pump but as soon as pumping started the level dropped to below the transducer. The level indicator showed the level was below the bottom of the pressure transducer during pumping. We recommend repairing and/or replacing the water level probe so that accurate readings are attainable and long-term trends can be monitored and evaluated. If accurate, this well is likely cavitating Pump Curve: The plotted point on the pump curve (Exhibit A) indicates that the pump is operating below the published curve. Total head calculations may be off due to restrictions between the pump and the pressure gauge, and/or the pump is experiencing some wear. The pump is operating in a good efficiency point and we do not recommend removing the pump equipment from the well currently. Annual testing is recommended to match this test s closely as possible. Page 3 of 18 Fraser Wellfield Evaluation Report – August 17, 2020 COLORADO WATER WELL 2001 E. 58th AVE. DENVER, CO. 80216 Fraser Well 1 - Building Electrical and Mechanical Page 4 of 18 Fraser Wellfield Evaluation Report – August 17, 2020 COLORADO WATER WELL 2001 E. 58th AVE. DENVER, CO. 80216 Fraser Well No. 2 Meggger: Lead and motor measurements indicates that the motor and cable are in fair to poor condition: Lead to lead resistance = 0.8 to 1.0 ohms Lead to ground resistance = 0.6 X 100,000 – Weak but operable. The next time this pump fails we recommend new cable be installed in this application. Amperage: Running amperage average was 16.9 and average line voltage was measured at 150.2. Amps and volts were relatively stable throughout the test and electrical readings indicate that the motor is in good condition. Flow: Testing indicated that Well 2 was producing at an average rate of between 90.6 (installed meter GPM) and 100.7 (test meter GPM). Test meter accuracy and installed meter accuracy had a variance of 11.2% which is fair to poor. The location for the test meter was questionable, so we have plotted the flow based on the installed meter. Discharging to waste through a pipe should be planned the next time this well is tested. Discharge Pressure: Pressure measured at the building was 8 PSI to 10 PSI and the estimated total dynamic head was 91’. Water Level: The static water level measurement was 67’ above the transducer and the calculated pumping level based on a pump setting depth of 72’ was 45.3. This used to calculate the total dynamic head. The level indicator should be calibrated both in static and pumping conditions to ensure data is accurate. The water was overflowing the pitless unit in static conditions and this should be addressed prior to freezing conditions potentially damaging the wellhead. Pump Curve: The plotted point on the pump curve (Exhibit B) indicates that the pump is operating below the published curve. The pump is operating on the right-hand side of the curve, but when wear occurs it will become more efficient before losing efficiency. Annual testing is recommended to match this test as closely as possible. Page 5 of 18 Fraser Wellfield Evaluation Report – August 17, 2020 COLORADO WATER WELL 2001 E. 58th AVE. DENVER, CO. 80216 \ Fraser Well 2 - Plumbing Fraser Well 2 - Test Meter Location (not ideal) Page 6 of 18 Fraser Wellfield Evaluation Report – August 17, 2020 COLORADO WATER WELL 2001 E. 58th AVE. DENVER, CO. 80216 Fraser Well 2 – Overflowing Pitless Unit Page 7 of 18 Fraser Wellfield Evaluation Report – August 17, 2020 COLORADO WATER WELL 2001 E. 58th AVE. DENVER, CO. 80216 Fraser Well No. 3B Meggger: Lead and motor measurements indicates that the motor and cable are in fair to good condition: Lead to lead resistance = 1.5 ohms on all three legs Lead to ground resistance > 30,000,000 ohms. Amperage: Running amperage average was 20.8 and average line voltage was measured at 138.7. Amps and volts were relatively stable throughout the test and electrical readings indicate that the motor is in good condition. Flow: Testing indicated that Well 3B was producing at a rate of between 58 (installed meter GPM) and 44 (test meter GPM). The variance is 23.8%, which is poor. The location for the test meter was not ideal, so the next time this well is tested we recommend discharging out of the building through a pipe that will guarantee test meter accuracy. We recommend retesting 3B with a modified discharge setup to obtain accurate flow meter readings from a test meter. We will look more closely at this on our next site visit to Fraser. Discharge Pressure: Pressure measured at the building was 10 PSI and the estimated total dynamic head was 111’. Water Level: The water level measurement is incorrect. The level indicator showed the level was at 63.7’ in static condition and quickly dropped below the bottom of the pressure transducer during pumping. We recommend repairing, recalibrating, and/or replacing the water level probe so that accurate readings are attainable and long-term trends can be monitored and evaluated. Pump Curve: The plotted point on the pump curve (Exhibit C) indicates that the pump is operating well below the published curve and this pump is very inefficient. Total head calculations may be off due to restrictions between the pump and the pressure gauge, and/or the pump is experiencing severe wear. The pump is operating to the left and below the published curve and we recommend removing the pump equipment from the well and replacing it with more efficient equipment. A final test should be performed to waste prior to pulling this equipment, inspecting the well with a video camera, rehabilitating the well if needed, and installing new equipment. Page 8 of 18 Fraser Wellfield Evaluation Report – August 17, 2020 COLORADO WATER WELL 2001 E. 58th AVE. DENVER, CO. 80216 Fraser Well 3B - Fuji test meter installed (mot ideal) Fraser Well 3B - Water level measuring negative water above the transducer Page 9 of 18 Fraser Wellfield Evaluation Report – August 17, 2020 COLORADO WATER WELL 2001 E. 58th AVE. DENVER, CO. 80216 Fraser Well 3B – Plumbing inside building Page 10 of 18 Fraser Wellfield Evaluation Report – August 17, 2020 COLORADO WATER WELL 2001 E. 58th AVE. DENVER, CO. 80216 Fraser Well No. 5R Meggger: Lead and motor measurements indicates that the motor and cable are in fair to good condition: Lead to lead resistance = 1.5 ohms on all three legs Lead to ground resistance > 30,000,000 ohms. Amperage: Running amperage average was 20.8 and average line voltage was measured at 138.7. Amps and volts were relatively stable throughout the test and electrical readings indicate that the motor is in good condition. Flow: Testing indicated that Well 3B was producing at a rate of between 174 (installed meter GPM) and 173 (test meter GPM). The variance is 0.7%, which is very good. The plumbing in this well allowed accurate measurements from both the installed meter and the test meter. Future modifications should consider reducing pipe diameters and installing plumbing to provide meter accuracy. Discharge Pressure: Pressure measured at the building was 16 PSI and the estimated total dynamic head was 172’. Water Level: The water level measurement is incorrect. The level indicator showed the level was below the bottom of the pressure transducer during pumping. We recommend repairing, recalibrating, and/or replacing the water level probe so that accurate readings are attainable and long term trends can be monitored and evaluated. Pump Curve: The plotted point on the pump curve (Exhibit D) indicates that the pump is operating at or very near the published curve and this pump is efficient. The pump is operating slightly to the right and on the published curve and we recommend testing this well annually, matching this test as close as possible Page 11 of 18 Fraser Wellfield Evaluation Report – August 17, 2020 COLORADO WATER WELL 2001 E. 58th AVE. DENVER, CO. 80216 Fraser Well 5R – Plumbing Fraser Well 5R - System Pressure -- Slight Water Hammer Page 12 of 18 Fraser Wellfield Evaluation Report – August 17, 2020 COLORADO WATER WELL 2001 E. 58th AVE. DENVER, CO. 80216 Fraser Well 5R – Test meter vs installed meter – Excellent correlation at beginning of test Page 13 of 18 Fraser Wellfield Evaluation Report – August 17, 2020 COLORADO WATER WELL 2001 E. 58th AVE. DENVER, CO. 80216 Fraser Well No. 7 Meggger: Lead and motor measurements indicates that the motor and cable are in fair to good condition: Lead to lead resistance = 10 ohms on all three legs Lead to ground resistance = ∞. Amperage: Running amperage average was 4.7 and average line to line voltage was measured at 277. Amps and volts were relatively stable throughout the test and electrical readings indicate that the motor is in good condition. Flow: Testing indicated that Well 7 was producing at a measured rate of between 71 (installed meter GPM) and accurate readings could not be obtained with our test meter. Throughout the entire test, air was noticeable in the system and this indicates a potential problem with either cascading water and/or cavitation of the pump equipment. The plumbing in this well is relatively large diameter, except for the location of the installed meter, and the existing plumbing combined with air entrainment, accurate flow measurements from the test meter are not possible. Future modifications should consider reducing pipe diameters and installing plumbing to provide a location to connect a test meter to verify the installed meter accuracy. Discharge Pressure: Pressure measured at the building was 6 PSI and the estimated total dynamic head was 49’. Water Level: The water level measurement is incorrect. The level indicator was stuck at 28’ and is not working properly. We assumed the pumping level was near the pump intake. We recommend repairing, recalibrating, and/or replacing the water level probe so that accurate readings are attainable and long-term trends can be monitored and evaluated. Pump Curve: The plotted points on the pump curve (Exhibit E) indicate that the pump is operating way low of the curve (71 GPM). This pump is very inefficient. Discussions onsite lead us to believe that this pump may have been designed to pump to a higher head and it has not been changed out since the system has been modified and the wells are now only required to pump against low head applications. This equipment should be removed, tested in a test pit and a new design for this well system should be evaluated. Page 14 of 18 Fraser Wellfield Evaluation Report – August 17, 2020 COLORADO WATER WELL 2001 E. 58th AVE. DENVER, CO. 80216 Fraser Well 7 – Plumbing Well 7 – Test meter (123 GPM) vs Installed meter (77.4 GPM) Page 15 of 18 Fraser Wellfield Evaluation Report – August 17, 2020 COLORADO WATER WELL 2001 E. 58th AVE. DENVER, CO. 80216 Fraser Well No. 9 Meggger: Lead and motor measurements indicates that the motor and cable are in fair to good condition: Lead to lead resistance = 0.4 – 0.6 ohms Lead to ground resistance = 750,000,000. Amperage: This is a single-phase system so no long term amperage and voltage could be captured. Flow: Testing indicated that Well 9 was producing at a measured rate of between 174 (installed meter GPM) and 170 (test meter GPM). The variance is 2.3%, which is very high. Discharge Pressure: Pressure measured at the building was 12 PSI and the estimated total dynamic head was 60’. Water Level: The water level measurement appears to be correct. The level indicator showed the static water level was 103’ above the transducer and the final pumping level was 34’ above the transducer. recalibrating, the water level probe so that accurate readings remain attainable and long term trends can then be monitored and evaluated. Pump Curve: Due to the inconsistencies in the flow measurement, plotting points on the pump curve are likely worthless, but the plotted points on the pump curve (Exhibit F) indicates that the pump is either operating way low of the curve (71 GPM) or at or very near the published curve, but way off to the right (123 GPM. In either case, this pump is very inefficient. Discussions onsite lead us to believe that this pump may have been designed to pump to a higher head and it has not been changed out since the system has been modified and the wells are now only required to pump against low head applications. This equipment should be removed, tested in a test pit and a new design for this well system should be evaluated. Page 16 of 18 Fraser Wellfield Evaluation Report – August 17, 2020 COLORADO WATER WELL 2001 E. 58th AVE. DENVER, CO. 80216 Fraser Well 9 - Plumbing Fraser Well 9 – Single Phase Controller Page 17 of 18 Fraser Wellfield Evaluation Report – August 17, 2020 COLORADO WATER WELL 2001 E. 58th AVE. DENVER, CO. 80216 Comments / Recommendations General – We now have a better understanding of how the Fraser Wellfield is designed and operates. While we have obtained substantial amounts of data, we would like to meet with you and your staff to review the data and prioritize repair and rehabilitation efforts. The good news is that the cost to produce water from the Fraser wellfield is low due to shallow well depths, low head pressures, and relatively low horsepower needed to operate each well. We believe that modifications to the system can be made to improve system reliability and reduce short- and long-term operating costs for some wells. During our testing, we found that the system was originally designed so the wells could pump to water storage located higher in the system. A modification has been made and all wells in the Fraser Wellfield now pump to an in-ground storage tank and the booster pumps located at the storage tank provide the lift to tanks higher up in the system. It is likely that Wells 1, 3B, and 7 have issues with water level transducers and/or are experiencing cascading water issues. We recommend that these three wells be put on high priority for repair and rehabilitation if needed. Well 7 had entrained air the entire test and this is a well that we will likely recommend be placed high on the priority list for repair and rehabilitation efforts. Well Rehabilitation After evaluating all data, we recommend that the top three candidates for well upgrades / rehabilitation are 1) Well 7, 2) Well 2 and 3) Well 9. We recommend that all three of these wells be worked on as soon as possible. Water level transducers will be evaluated upgraded whenever any pumping equipment is removed for maintenance. We will provide recommendations and a proposal to perform work on those wells under separate cover. We also recommend that annual testing be performed to track well and pump efficiency. Once baseline data can be obtained for a three year period, well upgrades and rehabilitation efforts can be prioritized and the wells can be maintained to maximize reliability, production and also minimize total operating costs associated with production from the entire wellfield. System Modifications We recommend that a calibrated pressure gauge and possibly pressure transducer be installed on each well between the discharge and the check valve so that accurate pressures are measured and recorded and also so that total dynamic head of the system can be calculated at any time. A pressure transducer can also be connected to your SCADA system for automatic recording purposes. Future plumbing modifications at each well should consider that installation of a test flow meter to calibrate and test accuracy of installed flow meters will be beneficial. Page 18 of 18 Fraser Wellfield Evaluation Report – August 17, 2020 COLORADO WATER WELL 2001 E. 58th AVE. DENVER, CO. 80216 Clean and maintain sanitary conditions inside the building on a quarterly basis. If you have any questions regarding this letter report or the attachments, please call me. We look forward to working with you with you on your long-term plan to test and insure that all well systems are operating effectively and efficiently. Sincerely, Thomas M. Dea, P.E. Colorado Water Systems We Move Water COLORADO WATER WELL 2001 E. 58th AVE. DENVER, CO. 80216 COLORADO WATER WELL 2001 E. 58th AVE. DENVER, CO. 80216 (303) 892-9053 FAX 303-892-1924 Adam Cwiklin, CWP September 9, 2020 Water and Wastewater Superintendent Town of Fraser 153 Fraser Avenue Fraser, CO 80442 Re: Well Rehabilitation and Equipping – Fraser Wells 2 7, and 9 Dear Adam, Thank you for allowing Colorado Water Systems the opportunity to provide this proposal for rehabilitation and equipping of Fraser Well No. 2, Fraser Well No. 7, and Fraser Well No. 9. We chose these three wells following our testing and evaluation because these are the three wells that will provide the most efficiency improvements of all the wells in the Fraser Wellfield. Per our understanding the following scope of work is anticipated along with pricing: 1. Mobilize / Demobilize all equipment and tools, and per diem. Lump Sum - $4,400.00 2. Remove equipment form all three wells and inspect equipment as it is removed. Lump Sum - $3,400.00 3. Videolog all three wells – and provide recommendations for well rehabilitation Lump Sum - $2,850.00 4. Rehabilitate wells utilizing direct airlift, reverse airlift, chemical and mechanical cleaning techniques. Budget Estimate – 3 wells @ 30 hours per well @ $275.00/hour - $24,750.00 Consumable materials budget estimate $1,800.00/well - $5,400.00 5. Install and remove test pumping equipment and test each well for a minimum of 4 hours following well cleaning and rehabilitation. NOTE – Step test each well at three flow rates – highest rate of rates up to 150% of existing operating capacity. Lump Sum - $6,600.00 COLORADO WATER WELL 2001 E. 58th AVE. DENVER, CO. 80216 6. Budget estimates to supply and install all new downhole equipment (except transducers) to match existing flow rates at each well, start up and test equipment with a 100-minute test to memorialize new baseline conditions. A. Well No. 2 - $5,908.00 B. Well No. 7 - $6,405.00 C. Well No. 9 - $8,974.00 Total New Equipment Budget - $21,287.00 Total Budget Estimate - $68,687.00 Notes: • We will coordinate all work with Fraser Staff and provide detailed cost proposals for all final equipment to be new and or refurbished. • If testing indicates that wells should be equipped with higher or lower capacity equipment we will provide those recommendations and associated cost adjustments prior to performing installation of permanent equipment. Additional services, if requested, will be negotiated prior to any work being performed. If you have any questions regarding this proposal please call me at 303-882-3749 Thank you for your time and consideration. We are looking forward to working with you on this important project. Sincerely, Accepted By: Tom Dea ________________________________ Colorado Water Systems Town of Fraser