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HomeMy WebLinkAboutAgenda Report - July 18, 1984 (72)I r - CITY COUNCIL MEETING �i JULY 18, 1984 FASTS IDE % ATFR Council was apprised that the City of Lodi presently lV31. SITING has the replacement of two water wells budgeted for the STMT, east side of our wa.er system. The Public Works staff inforrw.Ki the Council approximately 3 months ago at a shirtsleeve session that we had had major difficulties in negotiating site locations with property owners and recerrmended that we retain a consultant to determine \ the best location for our eastside wells. Based on the City's past experience in dealing with property (x%ners in this area. it is the City's feeling that the City will have to go through condermation in order to obtain the required well sites on the eastside. It is for that reason that Staff feels strongly that the siting of these future wells should be backad up by sufficient and accurate engineering and field data. The City has received a proposal fram the engineering finr, Black & Veatch. who were previously retained to update the City's Water n'isster Plan. The cost of the study is estimated at $9.000.00. It is recommended that the Siting Study be funded from those funds budgeted for eastside well replacement. Mr. Dave Itequa . the proposed Project Dtrgi neer for the firm of Black a Veatch was in the audience and responded to questions as were posed by the Council. On tirot ion of Mayor Snider. 11inctmm second. Council authorized the retaining of the firm of Black and Veatch to perform the Fastside Water Well Siting Study at a cost of $9.000.00. eft(1) OF LODI PUBLIC WORKS DEPARTMENT TO: City Council FROM: City Manager DATE- July 13, 1984 SUBJECT: Eastside Water Well Siting Study COUNCIL COMMUNICATION RECOMMENDED ACTION: That the City Council authorize the firm of Black b Veatch to perform the Eastside Water Well Siting Study. BACKGROUND INFORMATION: The City of Lodi presently has the replacement of two water wells budgeted or the east side of our water system. The Public Works staff informed the Council approximately 3 months ago at a sh-irtsleeve session that we had had major difficulties in negotiating site locations with property owners and recommended that we retain a consultant to determine the best location for our eastside wells. Based nn our past experience in dealing with property owners in this area, it is our feeling that the City will have to go through condemnation in order to obtain the required well sites on the eastside. It is for that reason that we feel strongly that the siting of these future wells should be backed up by sufficient and accurate engineering and field data. We have received a proposal from the engineering firm, Black S Veatch, who were previously retained to, update the City's Water Master Plan. A copy of their proposed work plan is attached. Dave Requa, the proposed Project Engineer from Black ;, Veatch, will be at the Council meeting to explain the study and answer any questions that the Council may have. The cost of the study is estimated at $9,000. It is recommended that the Siting Study be fund d from those funds budgeted for eastside well replacement. A Ja k t.Ro nsko Pu 1irks Director Attachments cc: Water/Wastewater Supt. Dave Requa JLR/eeh APPROVED: HENRY A. GLAVES, City Manager FILE NO. WORK PIAN To achieve the objective and purpose of the study within the desired economic framework, we have broken potential work into a series of tasks. Based upon our . preliminary analysis of available existing data, we believe a sound technical report can be prepared through the execution of Tasks I through S. The alphabetized subtasks would only be necessary should some significant development occur Ouring the course of the study or should a major controversy arise during the public review process. A key to the level of effort required for this study will be the access to dada available from the areawide ground water model study. During our in-ltlal Investigation both the contractor and county were reluctant to allow us access to the information gathered to date. This proposal is based upon the assumption that the City can provide access to available information. Task 1 - Background Oata Gathering This task will gather the existing data available regarding the area of the proposed well sites. Well logs for existing wells will be collected from San Joaquin County and/or the State Department of Water Resources to provide data regarding aquifer c:haractistics and well locatior-s; background data as to the location of existing wells, aquifer characteristics, and cone of depression informati(m will be obtained from the areawide ground water basin model study currently in progress for the San Joaquin Flood Control Agency; property boundary Information will be gathered from the City and County Assessor; available planning and mapping Information will be reviewed to identify existing land use and structure locations and will assess future development potential; existing utility locations will be reviewed to assess access for connecting future wells; and a site recon- naissance will be conducted to verify actual field conditions as can be obtained through visual inspection from public right-of-ways. Task 1A - Detailed Well Survey The purpose of this task is to identify, evaluate, and categorize all existing wells in the study area, should controversy arise. Existing public information may not identify all existing welts or accurately depict their characteristics. Access permission would be required to verify, inspect, and test each existing well within the study area. Task 2 - Ground Water Hydrology Analysis Based upon existing well logs and informau'roi in we are.rwide ground water basin study, the probable and most conservative sphere of Influence of existing wells will be calculated. Task 2A - Aquifer Characteristic Verification Historically, well log data has been insufficient to rstahiish transmissibility coefficients, permeability, porosity, and other key ground water movement parameters. This task would provide geotechnical investigation to verify that information, should controversy arise. Task 2B - Aquifer Modeling Ealuation of yield and interference for multiple wells in close proximity can best be evaluated by use of computer techniques. This task would model the study area to more accurately evaluate the sphere of influence, should controversy arise. -4- Task 3 - Water Distribution Review This task will review and evaluate information regarding new well locations contained in the 1977 Master Water Plan in relation to recent system development. If system development is progressing as aniticpated, new well needs identified in the 1977 report will be used as the basis for this study. If, at the conclusion of the study, acceptable well sites are not available in accordance with the 1977 report, Task 3B may be required to assess the adequacy of the available well sites in relation to distribution system development. ask 3A - Water Distribution Analysis Should the need arise during the course of the study to identify different locations for well sites than those established in 1977, a computer analysis of the distribution system will be conducted to identify the new areas or verify the acceptability of an available area. Task 4 - Report Preparation The purpose of this task is to prepare the final report for presentation to the City. A draft will be submitted to the City staff for review and comment. Task S - Report Presentation The purpose of this task is to review the study work with city staff at two key points; upon selection of objective evaluation criteria, and upon completion of a draft; and to make a formal presentation at four city council and/or public hearings.