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HomeMy WebLinkAbout6E - Water Booster Station for Wilds Dev. DATE: 6E LARRY J. ANDERSON, DIRECTOR OF PUBLIC WORKS CONSIDER AUTHORIZING MAIER STEWART & ASSOCIATES, INC. TO PREPARE PLANS AND SPECIFICATIONS FOR A WATER BOOSTER STATION FOR THE~LDSDEVELOPMENT AUGUST 16, 1993 AGENDA NUMBER: PREPARED BY: SUBJECT: INTRODUCTION: The purpose of this Agenda itern is to authorize Maier Stewart & Associates, Inc. (MSA) to prepare plans and specifications for a water booster station for The Wilds Development BACKGROUND: The Wilds Developrnent encornpasses an area which is higher than the rest of the City. The ground elevation is such that the City's existing elevated storage tanks will not provide adequate water pressure to a large area of The Wild's Developrnent A separate pressure zone is required to provide adequate water pressure. The system will consist of a purnping station with check valves to isolate the two (2) water pressure zones. DISCUSSION: MSA has provided two (2) options to the City to provide the higher pressure zone. OPTION #1 One option is to use an elevated tower in conjunction with the booster station, The advantage of this system is in the event of a power failure or breakdown rnore time is available to make repairs. The disadvantage is the initial cost for a small elevated tank is an additional $175,000.00. The tank will require repainting every ten (10) years plus nonnal maintenance. Option #2 includes a generator for power outages, The tower would provide about a day's storage and no generator is included in this option. Cost for Option #1 Elevated Storage Tank $175,000.00 Booster Station & Check Valve $340.000,00 TOTAL $515,000.00 4629 Dakota 51. 5,E., Prior Lake, Minnesota 55372 / Ph. (612) 447-4230 / Fax (612) 447.4245 AN EQUAL OPPORTUNITY EMPLOYER ALTERNATIVES: OPTION #2 The second option is to construct the same booster station with check valves as in Option #1. The booster pumps would have variable speed pumps which change speed to increase or decrease pressure as demand changes. The station would have dual pumps and controls so that one would autornatically start in the event of a failure. The station would have a standby generator which would autornatically start if a power failure occurs. The overall system cost would be approximately $90,000.00 less than Option #1. A generator is mandatory with Option #2 as the booster station will operate twenty-four hours per day, 365 days per year. Cost for Option #2 Variable Speed Booster Station & Check Valve $350,000.00 Generator $ 75.000,00 $425,000.00 TOTAL Other cities have operated booster stations and have found the equipment to operate at acceptable levels, Of course, no booster station is better than having one, if that were a choice. Staff believes that Option #2 will provide an acceptable level of selVice for the City's water system, based upon MSA recornmendation overall maintenance cost and initial cost. MSA have submitted the attached proposal to provide for the design and construction of the booster station. The attached letter frorn Mike Morley authorizes the City to make payment for engineering selVices and to use the security for the golf course grading for payment if payment is not made. The proposal from MSA would be not to exceed $55,644.00 for design and construction. The cost for design is not to exceed $41,694,00. The cost is anticipated to be less as The Wilds architect will provide the overall exterior building design. The request at this point is to authorize design of the booster station. Staffs position has been that The Wilds Development will be responsible for the design and construction of the booster station, and will be included in the Developer's Agreernent. The alternatives are as follows: 1. Authorize MSA to prepare plans and specifications for a water booster station for The Wilds Development with cost reimbursement from Prior Lake Development. 2, Table this item for further discussion. 3. Do not approve the design of a booster station. RECOMMENDATION: Staff recommends Alternative #1. ACTION REQUIRED: Make a motion to: 1. Authorize Maier Stewart & Associates, Inc. to prepare plans and specifications for a water booster station for The Wilds Development with reirnbursement of design costs not to exceed $41,694.00 from Prior Lake Development, and 2. Confmn that the construction costs of the booster station are to be incorporated into the Developer's Agreement as recommended in the Staff Report. AGEN6E.WRT ~ffEvViL1)S GOLF CLue . 'Augus,t 10,1993 Larry Anderson, P.E. Director of Public Works City Engineer . City of Prior Lake Dear Larry" _ This letter authorizes the City of Prior Lake to go forward with the 'proposal by Maier stewart and Associates Inc~ for the booster station and have all invoices billed to the city. Prior Lake Development, L.P. will then pay these invoices. when presented by the city. For security to insure these' pa~ents 'are made', Prior Lake Development would recommend using the golf course deposit of $40,000 currently 'held by the city. This should cover all payments to 'Maier stewart . and Associates, Inc. since, Wayne Bishop will be doing the architectural work. Sincerely, ti2)J(~ MJ'ha~; M:i'ley ?T ' project Manager J' '. , 0 ~\L.OS PARKw ~ao '. "y t:> ~/O ~ (,,/(~ . f.1N 55372 f'AX 6'2,445,63~o 0\0\55 <: . 0\0\5. 6'~' o~E. . f'''' CONSULTING ENGINEERS Maier Stewart & Associates Inc. August 4, 1993 File: 900-000-00 Mr. Larry Anderson Director of Public Works City of Prior Lake City Hall 4629 Dakota Street SE Prior Lake, MN 55372 RE: PROPOSAL; THE WILDS BOOSTER STATION Dear Mr. Anderson: Maier Stewart & Associates, Inc., is pleased to submit this proposal to cornplete The Wilds Booster Station project. Our proposal will be presented in four sections: background information, work scope, budget, and schedule. BACKGROUND INFORMATION The Wilds developrnent will encornpass an area of Prior Lake with ground elevations wrying frorn 1,000 feet USGS to over 1,050 feet USGS. This ground is the highest ground within the corporate limits of the City. The City's water system is pressurized by two water towers. Each of the water towers has an overflow elevation of 1,133.5 feet USGS and a 40-foot operating range. When completely full, the water towers will provide only 36 psi to the highest ground in The Wilds. When the water towers are one-half full, water pressure on the highest ground will drop to 27 psi. Considering the fact that multi-level structures are to be built, water pressure on the upper floors will be still lower. Water pressure in the range of 20 to 40 psi is inadequate to serve the upscale residential development, the hoteVc1ubhouse, and the commercial development planned on the high ground. 1b provide adequate pressure, a separate pressure zone needs to be established. There are two basic approaches to creating the pressure zone. One approach is to construct a constant speed pumping station and water tower. The other approach is to construct a wriable speed pumping station, Because construction of a wriable speed pumping station should lead to the lowest life cycle cost, a variable speed pumping station should be implemented, 1959 SLOAN PLACE. SUITE 200. ST, PAUL, MINNESOTA 55117 812,774-8021 9800 SHE LARD PARKWAY, SUITE 102. MINNEAPOLIS. MINNESOTA 55441 612.546-0432 · Equal Opportunity Employer The variable speed pumping station will include the following major elements: . Masonry cavity wall construction--concrete block back-up wall with stone veneer, . Pre-cast roof with single ply, ballasted roof. . Two 500 gpm, 15 horsepower, variable speed pumps. . One 1,000 gpm, 30 horsepower, constant speed pump. . 100 KW standby generator with automatic transfer switch. The generator is to be housed in a separate room in the booster station. The initial construction cost estimate for the booster station is in the range of $325,000 to $350,000. WORK SCOPE GENERAL Maier Stewart & Associates, Inc. (MSA) will complete the project tasks for The Wilds Booster Station project as outlined below. MSA is convinced that a high level of coordination is required between the staff of the City of Prior Lake and MSA to optimize the benefits of The Wilds Booster Station project. MSA is comrnitted to providing this high level of coordination. I. PROJECT MANAGEMENT A. Project Management MSA is a (um believer in the strong project manager concept. Our firm makes a strong commitment to provide the project manager with the human resources and equipment necessary to complete his/her project in a timely fashion. At MSA, the project manager is the focal point of all communication between the client and the project team. This concept permits smooth and effective communication between the client and the MSA staff members assigned to the project. B. Quality Assurance Reviews Quality work is the hallmark of MSA · s professional practice. MSA places great emphasis on doing quality work to the client's satisfaction. Testimony of MSA's commitment to quality is the amount of new work the firm receives from repeat clients each year. Several of MSA' s current clients have been with the firm since its inception in 1980. For The Wilds Booster Station project, MSA will assign a Senior Engineer to complete an independent quality assurance review of the design, calculations, and (mal plans and specifications. D. PROJECT INITIA TION/COORDINA TION A. Initiation Meeting with Prior Lake Staff At the project initiation meeting, MSA will outline the data that will be needed to complete the project. It is also MSA's intention that communications channels be defined at this meeting. B. Data Collection/Input Meetings MSA anticipates additional meetings during the design of the booster station. The purpose of these meetings will be fourfold as follows: . Collection/clarification of data. . Allow opportunity for input by Prior Lake staff. . Provide progress updates of status to date, . Provide for interim review of work completed to date. DESCRIPTION OF PROJECT TASKS The description of project tasks to be completed by the MSA team follows. m. PROJECT TASKS A. Preliminary Work Prior to the initiation of design services, MSA will prepare the following: 1. Preliminary Desip Report A preliminary report identifying location, size, and capacity and type of construction of booster station will be prepared. Schematics and preliminary floor plans will be furnished. 2. Preliminary Cost ~imate A preliminary cost estimate will be prepared identifying the probable construction cost of the items described in the preliminary design report. The cost estimate will be reviewed with the City of Prior Lake and the facilities will be modified to conform with established budgets. B. Design Services 1. Booster Station - Deslp Services MSA will provide architectural and engineering services associated with the planning and design of the booster station. a. Architectural sketches of the booster station will be prepared and discussed with City staff. b. A site survey establishing horizontal and vertical control for the building will be performed. c. Construction drawings and specifications will be prepared and reviewed with City staff. Drawings and specifications will cover architectural, structural, mechanical, control, electrical, landscape plans, and site plans. All buildings and equipment will be energy efficient well above the minimum standards. d. Drawings and specifications of the booster station and appurtenant systems will be subrnitted to the Minnesota Department of Health for review. e. MSA will prepare an opinion of the probable construction cost of the booster station and appurtenant systems. c. Constmction Services 1. Basic Services Upon acceptance of the construction drawings and specifications by the City of Prior Lake, MSA will provide the following basic construction services for the construction project. a. Advertise for bids in the Construction Bulletin. b. Issue specifications to bidders, respond to bidder questions, issue addenda as necessary. c. Attend bid opening, analyze bids, recommend award of a construction contract. d. Upon award of a construction contract, prepare contract documents and monitor insurance requirements. e. Conduct preconstruction meeting. f. Perform construction surveys establishing a base line and benchmark for horizontal and vertical control. g. Provide periodic inspection, as a minimum on a weekly basis, and during periods of critical construction (e.g., concrete pours, installation of underground piping) inspect materials used, review progress of construction, and confer with contractors regarding problems, etc. h. Prepare, review, and recommend action for proposed change orders. Prepare cost estimates for proposed change orders, i. Monthly review and recommend approval of contractor's partial payrnent request, j. Attend City staff meetings as requested to report on project status. k. Review and provide the City of Prior Lake with updated construction schedule on a monthly basis and at major milestones during construction. 1. Review and approve shop drawings. m, Perform final inspection of construction, recommend City acceptance of booster station. n. Assist in start-up. o. Provide set of as-built drawings. D. Instruction and Training 1. Operator Training MSA will provide training for Prior Lake's operating staff for the systems and system components included in the project. The training shall include not only the systems included in this project, but how these interface with the existing water system. BUDGET LABOR MSA will bill the City of Prior Lake monthly for work on The Wilds Booster Station project. The number of hours that each person works on the project and their respective hourly billing rates will be the basis for labor billing. The tasks below summarize the anticipated maximum hours and labor billing: PRELIMINARY WORK Maximum l:Imln Maximum Billing Amount Civil Engineer Architect Mechanical Engineer Electrical Engineer Technician Secretary 24 52 18 22 76 --1.0 202 $12,272.00 DESIGN SERVICES Civil Engineer Architect Mechanical Engineer Electrical Engineer Thchnician Secretary 80 48 34 91 220 ~ 531 $29,422,00 BASIC CONSTRUCfION SERVICES Civil Engineer Architect Mechanical Engineer Electrical Engineer 'Thchnician Secretary 60 18 20 44 24 42 208 $12,542.00 INSTRUCTION AND TRAINING Civil Engineer Mechanical Engineer Electrical Engineer 8 4 -1 20 $1,408.00 $55,644.00 GRAND 10TAL 961 HOURS There will be no billing for direct expenses. SCHEDULE Maier Stewart & Associates, Inc., will complete the Preliminary Work and Design Services within six weeks of notice-to-proceed. Construction Services will be furnished in accordance with the construction contractor's schedule. Training will be provided at time of start-up. If you have any questions regarding this subrnittal, please feel free to call. Sincerely, MAIER STEWARf & ASSOCIATES, INC. ~~~~;J~~,~ Thomas A. Roushar, P.E. TAR:tp