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HomeMy WebLinkAboutTask Order No. 10023 with JUB Engineers for 2010 Sewer Master Plan~ E IDIAN~-~ , :~, ~ ~~a~ a'~: ~..~ .; 9 PURCHASING AGENT 33 E. Broadway Ave, Meridian, ID 83642 Phone: (208) 888-4433 x 417 Fax: (208) 887-4813 TASK ORDER N0.10023 Between CITY OF AAERIDiAN And J-U-B ENGINEERS, INC. This Task Order is issued by City and accepted by the Engineer pursuant to the mutual promises, covenant and conditions contained in the Master Agreement between the above-mentioned parties approved by City Council an December 12, 2006, and executed January 30, 2007. 2010 SEWER MASTER PLAN -TASK ORDER 10023 SECTION 1-PROJECT UNDERSTANDING The following describes J-U-B's understanding of the "projectu. The City of Meridian (°City" or "Client") wishes to develop a sanitary sewer master plan wi#h the following general components: • Existing System Analysis to identify system deficiencies. • Sanitary Sewer Master Plan to provide a plan for the future sanitary sewer system. • A Capital Improvement Plan for improvements needed in the next five years. • A working exis#ing system model in GIS format that City staff can utilize to answer internal and developer questions. • Training to utilize the software selected by the City. • Protocol for maintaining and utilizing the existing system model. • Optional - Add a committed flow layer in the existing model to account for approved developments. This project will update the existing system model, including incorporating previous models such as the Downtown sewer study, revising the land use, and assumptions used to generate flaws. The City's GIS system will play a vital role in updating the model and revising the flow generating portion of the model. The existing model will be used to determine deficiencies in the existing system and to provide parameters to be used in the Master Plan. Along with updating the existing system model, the Master Plan will be updated to incorporate the changes in the impact boundary and to modify the Master Plan in areas where development has taken place. The updated Master Plan will provide the conceptual layout of the sewer trunk lines 10" and larger. J-IJ-B will work with City staff to estimate growth patterns for the next five years and estimates of build-out densities and total build-out population. A Capital Improvement Plan will be developed to provide a prioritization for capital improvement projects based on the results of the existing system analysis and the growth projections. The project will include two phases. The first phase will include investigation and data gathering and development of modeling methodologies. The second phase will utilize the methodologies to develap the models and complete the Master Plan. Phase 1 -Initial Services Data Investigation: The integrity and completeness of the available data will be investigated to determine if further data will be required. This is anticipated to include GIS information, manhole elevation data, water meter usage records, record .drawings, and flow monitoring information. Existing Svstem Development: J-U-B will develop the existing system network components, verify system topology, and populate attribute information. This work can be performed parallel to the other Phase 1 tasks. Modeling Protocol: J-U-B wrill work closely with the Gity to develop existing, build-out, and master plan models for the Five Mile Trunk. Various methodologies for adding flows, running the model, and updating the model will be developed and discussed with the City, with the goal to determine an effective and simple methodology for the City to utilize for future operation and maintenance of the model. Phase 2 -Model Completion Existing Model: Based on the modeling protocol developed in Phase 1, develap the existing system model. Calibrate the model based on City's flow monitoring data. Supplement calibrated flows far existing system analysis. Master Plan: Master plan to City's Area of Impact boundary. Add flexibility in the boundary with Kung to allow for boundary fluctuation. Caoital Improvement Plan: Develop five-year growth plan with Public Works and the Planning Department. Model.. growth to determine and prioritize pending capital improvement. projects. Trainin :Provide regularly scheduled meetings with City staff to review progress and steps of model development. Send examples of model steps and directions for Citystaff to work on as model is being developed. APWA Accrq_ditation: Review model and master planning tasks with the City's intended accreditation process. SECTION 2 - ITEMS TO BE PROVIDED BY THE CLIENT TO J-U-B • The most recent aerial mapping will be provided in digital format, compatible with ArcView including aerial mapping that encompasses the new impact boundary. • Monthly water meter data for last five years in electronic format. • Electronic copies of GIS layers and geodatabases for use in developing the models, including the sewer layers, the parcel layers, and base map layers. • Record Drawings for developments in the study area as needed to supplement existing GIS data. • Development plans and preliminary plats for new developments in the study area. • The Comprehensive Plan or land use to be used if other than the Comprehensive Plan. • Criteria to be used to prioritize improvements identified in the Capital Improvement Plan. • Staff availability and office space for training. • Timely review of submitted materials and collaboration on the planning and master planning process as may be required throughout the project. • Protect liaison to coordinate interdepartmental internal processes. • Copy of the Re-use Water Master Plan. • Flow monitoring data and infiltration~nflow analysis. • WWTP and lift station flow records. • Lift station pump curves and design. • System condition survey information from ongoing "Hansen" conversion. • Diversion structure operating setup information. • Access to the sewer system, lift stations and wastewater treatment plant as needed to ver'rfy operation and model results. • Public Works Standard Operating Procedure Template. SECTION 3 -SERVICES Tfl BE PERFGIRMED BY J-U-B -Phase 1 3.1 PRELIMINARY WORK Gather information required for use in the project. This task will include the following subtasks: 1. Meet with City staff to determine available information that will assist with model development including, but not timited to: GIS data, SCADA data, treatment plant and lift station flow data, water meter data, land use information, record information, and known trouble spots within the system. Meet with City's GIS staff to review existing information including geo-networked system information and to discuss and jointly determine acceptable methodologies for updating data and providing results. 2. Record Drawings -Collect record drawings and design drawings when record drawings are unavailable for recent development not currently in GIS or with incomplete GIS data. 3. Land Use -Collect land use information such as the Comprehensive Plan and existing zoning maps. 4. GIS -Collect GIS data and GIS Coordination -Coordinate with the mapping staff to determine the format of existing data, format of model data, additional fields that may be required, and how to exchange data from the GIS master data and the model. GIS coordination shall bean ongoing task throughout the project. We anticipate two GIS coordination meetings. 5. Flow Monitoring Data from 20091nflow Investigation Project 6. Lift station SCADA data. 7. Other Data -Other data to be compiled and evaluated, if available: • Treatment plant flow data -Collect daily treatment plant flow data (in electronic format) for the last five years to determine peak infiltration times and to assist in calibrating the model. Compile seasonal high hourly WWTP flows (in electronic format) for at least four consecutive weeks in each of the last three years. Determine if more refined data can be acquired during flow monitoring to assist in calibration. • Industrial flow data -Collect industrial flow data from pretreatment program. • Rainfall data -Use WWTP rainfall data and other sources in the city to relate rainfall data to inflow data at the treatment plant and at flow monitoring locations ifi a rainfall event occurced during flow monitoring. • Rock depth -Search for area-wide rock elevation information to assist in decisions regarding deep trunk sewers versus lift stations. • Floodway/floodplain information -Compile FEMA data to determine floodway corridors and floodplain information for use in developing land use information and development limitations. 3.2 EXISTING SYSTEM DEVELOPMENT Update the existing system model to determine the existing conditions of the City's sewer system. The tasks involved to determine the existing conditions are as follows: Update Existing System The existing system layer will be generated from the City's GIS layer and from the previous model data and record. drawings for trunk lines supplied by the City in Task 3.1. The City's GIS data shall be checked against the previous model existing system layer to locate discrepancies between the model and the GIS data. Discrepancies shall be reviewed with City staff, field-checked, and modified, if necessary. Modifications to the GIS data will be coordinated with mapping staff. The model shall use inverts from the City's GIS where available. The GIS inverts shall be supplemented with inverts from the previous sewer model. For trunk lines 10-inches and larger, if inverts are not available from GFS or the previous model, the City shall field survey the manholes and provide the information for the model. Eight-inch lines shall be added to the model to facilitate flow routing from the flow generation layer. Record invert da#a shall only be used for the eight-inch lines if already available in GIS. Otherwise, the inverts shall be generated based on the City's manhole dip depths and existing contour topography. Generated inverts shall be clearly identified in the GIS data. 3.3 MODEL DEVELOPMENT PROTOCOL Develop model development options and review with City staff. This task will include hands-on demonstrations of model development options and discussion of advantages and disadvantages of various. options. This task will focus on two related issues: how the model is constructed and how it is maintained. Completion of an agreed-upon model and modeling protocol will serve as the platform for the service area-wide work completed in Phase 2. 3.3.1 Model Development Utilize existing system with Five-Mile Trunk active. Develop several modeling alternatives for the existing model and master plan model and review and discuss with City regarding ease of use, ease of maintenance, ability to represent field-measured flows and ability to review development requests. 3.3.2 Model Maintenance and Workflow and Model Update SOP (Standard Operating Procedures) Work Flow and Model Update SOP - J-U-B will work with City staff to develop and document a standard operating procedure for evaluating proposed development, creating model scenarios for evaluation, update/storage of existing made) update (when development is completed). The SOP will be developed with input from Engineering, Development Services and GIS staff and documented in a format consistent with the Public Works standard formatting. 3.3.3 Workshops with City staff to coordinate model development and implementation include GIS, Development Services, Operations, Engineering, Planning and Finance. Where possible, workshops will be scheduled sequentially or combine City divisions where appropriate. 3.4 PHASE 1 Summary Prepare a short summary of the assumptions and methodologies to use in Phase 2. A draft of the SOP will be provided. SECTION 4 -SERVICES TO BE PERFORMED BY J-U-B - Phas® 2 Phase 2 tasks may vary depending on the outcome of Phase 1. The scope and fee for Phase 2 may be adjusted as necessary at or near the completion of Phase 1. 4.1 DEMOGRAPHICS ANALYSIS J-U-B will work with City staff, including the Planning Department, to estimate growth patterns for the next five years, as well as an estimate of build-out densities and total build-out population. 4.1.1 City GIS data, building permit and sewer hook-up data will be used to check historic growth trends. 4.1.2 Evaluate water meter data versus Certificate of Occupancy records to estimate current vacancy rate for use in calibration. 4.1.3 The Consultant shall meet with City staff to review the forecast data and historic growth trends to determine if the forecast data requires general modifications or further analysis. If necessary, further analyses of the data shall be performed as an additional service as indicated in Section 5. 4.1.4 The assumptions used to develop the projected demographics and the results of the demographic analysis will be compiled in a letter to the City far confirmation. 4.1.5 Review localized land use plans for City concurrence such as: i) Ten Mile Specific Plan, 2) Downtown Master Plan (being conducted by MDC) and 3} Eagle Island Area. 4.2 EXISTING SYSTEM EVALUATION Update the existing system model to determine the existing conditions of the City's sewer system. The tasks involved to determine the existing conditions are as follows: 4.2.1 Develop Flow Generation Layer The flow generation layer shall be developed based on the methodology selected in Phase 1. Flow generation shall be based on parcel characteristics or specific water use data firom meters. Specific GIS parcel data and/or water meter data shall be used to determine the type of land use for the parcel and whether the parcel is developed or vacant. Land use will be reviewed with City staff to determine areas indicated as developed, but not attached to City sewer. Flow monitoring data, water use data, and historic modeling data will be used to generate flow characteristics to be used in the model. Specific flow data for industries will be utilized where available. 4.2.2 infiltration and Inflow Analysis • From the City's flow monitoring data, our additional flow monitoring data (if necessary), lift station SCADA and treatment plant data, delineate system characteristics and determine high and low infiltration periods and general geographic areas. • Review Inflow Study, currently under contract with others. • Review rainfall and available flow data. (1NWTP) to assess. general inflow impacts. • Determine return period for inflow analysis. • Apply infiltration and inflow data to the model. • Further analysis of infiltration and inflow may be required for lines with capacity concerns. Additional infiltration and inflow analysis shall be performed as indicated in Section 5. 4.2.3 Calibrate Model J-U-B shall calibrate the model based on the flow moni#oring information. The calibration process will consist of the following: • Run model and correct major discrepancies inflow, ii observed. • Run model and modify flow parameters until satisfied model run represents flow monitoring data. 4.2.4 Analyze Existing System J-U-B shall modify the calibrated model by adding inflow to the infiltration. The modified model will represent the conditions of existing sanitary flow, the high infiltration season, inflow from a rainfall event, and wet industrial flows at their permitted amount. The amount of inflow will be based on WWTP flow data and flow monitoring data, if applicable. The results from the existing model wilt be analyzed to determine excess capacity in the system and to identify potential problem areas. 4.2.5 Analyze Committed Flows J-U-B shall modify the existing model. to account for approved developments. Flows will be added as point flows for each development and reduced by a general ratio to account for portions of the development contributing flow in the existing model. 4.3 20'10 MASTER Pf1-AW UPDATE J-U-B shall develop the Master Plan based on the following: • Modifications to the Master Plan boundary. • Resultant changes downstream of the boundary changes. • Changes within the Master Plan due to development. The Master Plan will be updated with the aid of MW Soft's InfoSWMM. The software will be used as a tool to assist in establishing conceptual sewer alignments for major and minor trunks {10" and larger} throughout the new portions of the study area and make appropriate changes to the Master Plan's surrounding areas and downstream of the new areas. • The tasks required for update of the Master Plan shall include the following: 4.3.1 Develop Ultimate Land Use Flow Generation Layer J-U-B shall develop the land uses for the Master Plan based on the City's Comprehensive Plan and based on the City's recommendations regarding land uses and density and- approved localized land use studies. J-U-B shall check the densities of a representative sample of recent residential developments in the study area to determine if the current Master Plan land use designations are reasonable and will modify the current Master Plan land uses accordingly. For budgeting purposes, it is assumed that parcel-based flow generation will be used in the Master Plan. 4.3.2 Develop Sewer Trunk Master Plan J-U-B shall develop a sewer trunk Master Plan. The Master Plan shall conceptually lay out future trunk sewers 10" and larger required to serve the ultimate service area. The Master Plan shall be developed with a computer model as follows: Ultimate Service Area Layer The Master Plan service areas shall be developed based on existing topography and current political boundaries. Ultimate Land Use Layer The ultimate land use layer will be developed for land use areas in the study area. The land use designations will be based on the land use from Section 4.3.1. Ultimate System Layer Trunk lines will be generally routed along the drains and major roads based on the topography. Existing master plan routes will be examined for routing efficiencies and effective area serviceability. The model will be used to size the future trunk lines (10" and larger) and estimate the vertical alignment. Drain crossings shall be field-checked if they are determined to potentially affect the vertical alignment. J-U-B shall use a vertical separation criterion of three (3) feet between the drains and the master-planned lines or identify on the Master Plan drawing if a depth of less than three (3) feet is expected. 4.3.3 Modify Master Plan for Developed Areas J-U-B-shall modify the Master Pian in the areas affected by recent development added to the existing system. Changes will include modifying the system layer to account for the new recently constructed trunk lines. The service areas will also be checked against the development plans. 4.3.4 Determine Routing Through Existing System Determine routing through existing system and previously master-planned area. J-U-B shall modify the existing Master Plan to accept flows from the new areas. Line sizes shall be modified as needed and, if necessary,. new lines shall be added and existing lines relieved with parallel lines. 4.3.5 Master Plan Analysis and Results After the modifications listed above are made to the Master Plan, the sewer model will be run and pipe sizesmodified, as necessary. The. model results will be plotted and reviewed. Master Plan results shall be reviewed with City staff as outlined below. 4.4 PNASINGlCAPITAL IMPROVEMENT PLAN A Capital Improvement Plan will be developed to provide a prioritization for capital improvement projects based on the results of the existing system analysis and the growth projec#ions and utilizing the recommended line sizes from the Master Plan. 4.4.1 Meet with City staff to determine prioritization criteria to apply to the lines requiring improvement. Develop a prioritization routine that utilizes the criteria. 4.4.2 Analyze relief improvements and implement an optimization analysis with agreed evaluation assumptions. Meet with the City to rank alternatives and develop the preferred alternatives. 4.4.3 Utilize the prioritization routine to develop the Gapi#al Improvement Plan for five years. 4.4.4 Assess the downtown sewer system and coordinate phasing plan with the Downtown Sewer Study. 4.5 PROGRESS MEETINGS, WORKSHOPS AND TRAINING Training shall be performed with three general methods: 4.5.1 Regularly scheduled meetings -City staff will meet at J-U-B w®ekly or bi-weekly, depending on work flow, to experience witness development of the model. Model progress and major steps will be reviewed. 4.5.2 Work Flow Examples - J-U-B will provide work flow examples and instructions to City staff. City staff can complete work flow examples in parallel with model work flow for a better understanding of model developmen#. 4.5.3 In-House Training -After completion of the model, J-U-B shall train City staff how to use the model, run through an example of model modification, and review the City's use of the model. J-U-B shall provide assistance as the City becomes familiar with the model and to answer questions as they arise. In addition to the above training tasks, the following progress meetings and workshops shall be included: 4.5.4 Meetings With Non-City Entities -conduct meetings with other entities as necessary to gather information pertinent to model development and the Master Plan. Meetings include: • Merid'san Development Corporation and its Downtown Master Planning consultant; • COMPASS planning and demographics staff; and 4.5.5 Presentation to City Council - J-U-B will assist City staff with presentation of the Sewer Master Plan to City Council. J-U-B will provide large format exhibits and assist Public Works staff with development of a PowerPoint presentation. 4.6 FINAL PRODUCT J-U-B shall prepare a Meridian 2010 Sewer Master Plan Report summarizing the work performed and the results. J-U-B shall submit a draft copy of the report for review and comments. Ten (10) copies of the final draft shall be provided as well as an electronic form of the document in pdf format for the report and dwf format far the large drawing(s}. Deliverables: 1 } Tech: Memo 1 -Phase 1 Tech Memo 2) Final Report 3) Model Update SOP - Prepare staff manual outlining steps far GIS department, Development services, public works, etc SECTION 5 -ADDITIONAL SERVICES At the request of the Client, the following tasks may be performed: 5.1 ADDITIONAL SURVEY If necessary, additional manholes and drain crossings shall be field-checked per Section 3.2. 5.2 ADDITIONAL EXISTING SYSTSM MODIFICATION S This task shall be used if there are significant discrepancies between the City's GIS data and the latest existing system data. Record drawings, field-checks, and field surveys shall be used to rectify discrepancies. 5.3 ADDITIONAL MONITORING AND INFLOW ANALYSIS Additional inflow analyses may be performed for trunk lines with capacity concerns. This analysis may include flow monitoring for up to six weeks at up to two sites, review of historic lift station data, and development of inflow parameters for the trunk line{s) in question. 5.4 ADDITIONAL GIS SERVICES Provide assistance to the GIS department for general GIS services and support for integration with the City's infrastructure management software. 5.5 MISCELLANEOUS SERVICES 5.4.1 Operation and Maintenance -Identify po#ential locations of odor generation due to system hydraulics. Conduct interview and field visit with operational staff to qualitatively evaluate odor generation status. Evaluate existing diversions on relief sewer lines to estimate actual field operating conditions and, if necessary, develop recommendations for increasing operational and flow efficiency. 5.4.2 Energy Efficiency -Conduct lift station monitoring and review pump records to determine where pumps are operating atthe original design point on their pump curve and evaluate if potential exists to increase pump efficiencies. Review temporary lift station locations and determine steps for replacement of lift station with gravity sewer service. ~ 1 SECTION 6- PROJECT SCHEDULE The project schedule will be dependent on flow monitoring for the existing system analysis. The flows will need to be monitored during the peak infiltration season. The peak infiltration season will be determined from treatment plant records during Task 3.1, Preliminary Work. The rest of the schedule will be dependent on the flow monitoring schedule as indicated below: Task 3.1 -Preliminary Work -Will commence with Notice to Proceed. Shall be completed 4 weeks after Notice to Proceed. (Task 3.1.7 - GIS Coordination will be an ongoing task throughout the project) Task 3.2 -Survey -This is a support task for Task 3.3, Existing System Development, and Task 4.3, 2010 Master Plan Update. This task schedule will run parallel to those tasks. Task 3.3 - Existing System Development -This task shall be completed 6 weeks after Task 3.1 is complete. Task 3.4 - Model Development Protocol -This task will be performed in parallel with Task 3.3 and completed 6 weeks after Task 3.1 Phase 2 - To be completed within four months of the completion of Phase 1. BASIS OF FEE AND BILLING SCHEDULE: The CITY will pay ENGINEER for its services and reimbursable expenses as follows: Refer to Attachment "2". CITY OF M~ IAN TAMM de WE ,MAYOR Dated: ~ < - la- ° o'~-©! 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