Okaloosa County BOCC — January 8, 2013 — Revision 1 to Task Order 58 with Constantine Engineering — reading text

REVISION 1 TO TASK ORDER 58— OKALOOSA COUNTY WATER AND SEWER SYSTEM PROFESSIONAL ENGINEERING SERVICES FOR THE MEIGS SEMINOLE PUMP STATION IMPROVEMENTS PROJECT Revision 1 to TASK ORDER 58 THIS TASK ORDER IS ISSUED PURSUANT TO THE AGREEMENT FOR CONSULTING SERVICES DATED JANUARY 18, 2005, BETWEEN THE COUNTY OF OKALOOSA COUNTY, FLORIDA AND CONSTANTINE ENGINEERING, INC., WHICH IS INCORPORATED HEREIN BY THIS REFERENCE, WITH RESPECT TO Scope of Basic Services to Provide Professional Engineering Design and Construction Management Services for the Meigs Seminole Pump Station Improvements Project Article A. Purpose: The purpose of this Revision 1 is to authorize and direct CONSULTANT (Constantine Engineering, Inc.) to proceed with professional engineering design, services during construction (SDC), and resident observation services (RO) for the Meigs Seminole Pump Station Improvements Project (PROJECT) for the Okaloosa County Water and Sewer Department (COUNTY). The activities that are included are described in “Article B. Scope of Services.” Article B. Scope of Services: The Scope of Services authorized in this Task Order include, but are not limited to the CONSULTANT to provide professional engineering design services to construct a new Meigs Seminole Wastewater Pumping Station and upgrade a portion of the existing force main piping; a new force main to convey the existing flow from Lancaster Estates; to perform hydraulic and surge modeling of the system; to provide engineering design services to prepare contract documents for construction , bid phase services, services during construction (SDC), and resident observation (RO) services, or for alternative delivery design-build services for the construction of the PROJECT. The engineering and technical services that may be authorized in this task order by the COUNTY’s Representative include, but are not limited to, the following: Evaluation Services Engineering Design Services Permitting Assistance Geotechnical Engineering Services Coordination with other Utilities and Agencies Bid Phase Services Services During Construction Resident Observation Services Alternative Project Delivery Services SC ANATR WON Specific Work Tasks that may be authorized by the COUNTY’s representative are presented below. Work Task 1. Evaluation Services The specific engineering and technical services that CONSULTANT agrees to furnish to the COUNTY for the preparation of a hydraulic model for the existing 14 inch force main and the Lancaster Estates conveyance system for the PROJECT are described below. REVISION 1 TO TASK ORDER 58— OKALOOSA COUNTY WATER AND SEWER SYSTEM PROFESSIONAL ENGINEERING SERVICES FOR THE MEIGS SEMINOLE PUMP STATION IMPROVEMENTS PROJECT 1.1 Meetings CONSULTANT shall attend meetings as may be reasonably necessary, and as requested by the COUNTY, and provide general engineering assistance, consultation, and opinions regarding the PROJECT. 1.2 Review Existing Information and Data CONSULTANT shall collect and review pertinent information and data regarding the PROJECT and make this information and data available to the COUNTY. Information and data that may be reviewed includes but is not limited to the following: e Existing design information e Existing operating information regarding the pumping stations (Meigs Seminole, Evans Road, Lancaster and Ida Coon) e Existing pump curves, system curves, run times and known peak conditional impacts e Existing plan and profile drawings, survey and utility location information 1.3 Evaluation Work Tasks The CONSULTANT shall perform the following evaluation tasks: 1.3.1 Hydraulic Modeling 1.3.1.4 Consultant shall develop system model for the proposed Meigs Seminole PS to a proposed repump station to be constructed under a separate project A new force main to reroute all existing flows from the Evans Road PS, Lancaster PS and Ida Coon PS to the Meigs Seminole PS. The model will utilize existing profile drawing and surveys to determine pipe size, lengths and gradient to create overall model. The model will include upsizing the section of 10 inch force main on Hwy 20 (Bolton Branch); the new 16” force main design under the Task Order 10 and a new force main from the Lancaster area. 1.3.1.2 Scenarios will be run to determine expected operational pressures and surges for the new Meigs Seminole PS and the Lancaster Estates pumping stations. Information will be developed for varies flow and operational conditions. Graphical software will be utilized and presented in summary report. Recommendation will be made to for check valve operations, combination air release valve location and sizes and pump hp and impeller upgrades for all pump stations. 1.3.1.3 Hold meeting to display results and review operational scenarios. Provide written summary report of model and recommendation of improvements needed. 1.3.2 Existing PS Testing 1.3.2.1. Consultant shall oversee drawdown pump testing of Evans Road, Lancaster and Ida Coon pumping stations to be performed by COUNTY to determine current pumping capacity of each pump. 1.3.2.2 Testing will include single operational testing of each pump as well as parallel pumping capacity. A minimum of two (2) tests will be performed on each phase and results will be recorded. Pressure gauge reading will be obtained on discharge side of each pump and recorded for static and hydraulic head conditions 1.3.2.3 Data will be utilized in the hydraulic modeling of overall conveyance system. Data will be compared to the original pump design parameters and manufacture data to determine if improvements or upgrades will be required for PROJECT. 1.3.2.4 Analysis of data will be presented in graphical format and distributed to COUNTY along with estimated level of cost for any needed improvements or upgrades found as a result of the testing. Work Task 2. Engineering Design Services The specific Engineering Design Services that CONSULTANT agrees to furnish to the COUNTY for the PROJECT are described below. REVISION 1 TO TASK ORDER 58— OKALOOSA COUNTY WATER AND SEWER SYSTEM PROFESSIONAL ENGINEERING SERVICES FOR THE MEIGS SEMINOLE PUMP STATION IMPROVEMENTS PROJECT 2.1 Meetings CONSULTANT shall attend meetings as may be reasonably necessary, and as requested by the COUNTY, and provide general engineering assistance, consultation, and opinions regarding the PROJECT. 2.2 Design Scope Work Tasks The CONSULTANT shall perform engineering design services necessary to implement the recommendations indentified by the COUNTY as the preferred method for pumping the wastewater collected at the Meigs Seminole PS to a new East County Repump Station. The conceptual, preliminary and final design services will be developed to replace the existing suction lift constant speed pumps with new variable frequency drives; install a new fiberglass wetwell insert; new non-clog submersible pumps; discharge piping with above ground valves; new motor controls and power supplies installed in a pre-tested fabricated electrical building. Procurement documents will be prepared for the COUNTY to facilitate the purchase of specific equipment. It is understood the COUNTY will be constructing the recommended pump station facilities using its own forces, as supplemented by subcontractors directly contracted by the COUNTY and not contracted by solicitation using contract documents developed by the CONSULTANT. The specific scope of services that CONSULTANT shall provide in this work task is outlined below: The specific scope of services that CONSULTANT shall provide in this work task is outlined below: 2.2.1 Conceptual Design (30%) 2.2.1.1 CONSULTANT will perform conceptual engineering design (30%) for the following: e Replacement of approximately 1000 LF of existing 10” force main on Hwy 20 near Bolton Branch. . e Provide layout and constructability scenarios for a new submersible sewer pumping station, including a fiberglass circular wetwell and electrical building. . e Evaluate submersible non clog pumps and obtain recommended manufacture recommendation to meet average daily flow of conditions of 1.2 MGD and peak hour flow of 4.2 MGD. 2.2.1.2 Schedule and conduct a 60% design meeting and field review with the COUNTY, including schematic site/civil and mechanical layout plan and anticipated power requirements. The intent of this engineering phase is to finalize general constructability preferences in conjunction with the COUNTY'S installation and operation requirements to ensure a final design that is satisfactory to the COUNTY 2.2.2 Preliminary Design (60%) 2.2.2.1 CONSULTANT will perform preliminary engineering design and prepare preliminary (60 percent design documents) for the following: e Design upgrade of approximately 1000 LF of existing 10” force main on Hwy 20 near Bolton Branch and connect to a new 16” force main at the Rocky Bayou PS. e Design of approximately 1.2 miles of 10”-12” force main along the north side of Hwy 20 to convey the wastewater from the Lancaster Areas to the new Meigs Seminole PS. e Demolition of the existing PS, piping and valves. e New fiberglass reinforced polyester wetwell based on comments and direction received from 30% review. e Determine potential submersible non clog pumps suppliers to meet average daily flow of conditions of 1.2 MGD and peak hour flow of 4.2 MGD. Design will be evaluated for either a duplex or triplex system with a spare pump as back-up / emergency operation with portable generator. e New 10”’-12” discharge piping and isolation valves. e Evaluate and provide emergency generator sizes and manufactures. e This information will then be submitted to the COUNTY for formal review at a 90% progress review meeting. The intent of this preliminary engineering phase is to develop the proper pumps and constructability in conjunction with the COUNTY'S installation and operation requirements to ensure a final design that is satisfactory to the COUNTY. REVISION 1 TO TASK ORDER 58— OKALOOSA COUNTY WATER AND SEWER SYSTEM PROFESSIONAL ENGINEERING SERVICES FOR THE MEIGS SEMINOLE PUMP STATION IMPROVEMENTS PROJECT 2.2.2.2 Schedule and conduct a 60% design meeting and field review with the COUNTY, including preliminary site/civil and mechanical layout plan, pump curves, wetwell dimensional requirements, auxiliary power and control logic. 2.2.2.3 Establish the temporary and permanent installation and operational concerns, as well as vertical installation constraints Determine locations of air release and vacuum valves, power and dewater discharge (if applicable). 2.2.2.4 Identify and provide special details for pipe connections, pump installation, controls and SCADA configuration based on new electrical building and pump drives. 2.2.3 Final Design (90%) 2.2.3.1 CONSULTANT will perform final engineering design and submit final contract documents to the COUNTY based on the design review comments from the preliminary design review meeting. The intent of the final engineering phase is to further refine the design of the project with respect to permeability, constructability, costs, and to and prepare the plans for construction of the PROJECT by the COUNTY. CONSULTANT shall perform the following final engineering services. 2.2.3.2 Review and incorporate comments from 60% design review meeting. 2.2.3.3 Finalize design pump, wetwell, control and building preferred manufactures. Complete final procurement bid proposal and alternative selections if applicable. 2.2.3.4 Finalize bill of materials for the COUNTY to assist with the purchase of the materials for the PROJECT. Final material list will be incorporated into design documents and verified with COUNTY prior to final order being placed. 2.2.3.5 Submit 100% plans and specifications to COUNTY for final construction and solicitation. Work Task 3. Permitting Assistance The specific services that CONSULTANT shall provide include permitting tasks necessary to implement the PROJECT. The