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HomeMy Public PortalAboutthomas hutton inventory.pdfItem #7. j!j THOMAS & HUTTON 50 PARK OF COMMERCE WAY SAVANNAH, GA 31405 1 912.2234.5300 wWW.THOMASANDHUTTON.COM CITY OF TYBEE PROFESSIONAL CIVIL ENGINEERING SERVICES THOMAS & HUTTON CONTRACT TASK ORDER # 20 DATE August 12, 2020 ADDENDUM TO CONTRACT NO: CITY OF TYBEE PROFESSIONAL CIVIL ENGINEERING SERVICES THOMAS & HUTTON CONTRACT PROJECT: CITY OF TYBEE SANITARY SEWER INVENTORY FY20/21 CITY OF TYBEE (Owner) and THOMAS & HUTTON ENGINEERING CO. (Consultant/Engineer) this 12T8 day of August 2020, amend their contract dated February 28, 2018, for work, materials or services described below. 1. SCOPE OF WORK: City of Tybee has requested a proposal from Thomas & Hutton for the collection of sanitary sewer collection system data to provide a suitable geodatabase for future City use. The City has requested the sanitary sewer inventory include GPS locations of structure frames, measure downs from frame to inverts of structure and intersecting pipes, pipe diameter and pipe material. The City has indicated that budget allocations have been made for geothinQ under separate agreement. The inventory collection effort will be linked to the City of Tybee geothinQ subscription and will enable City staff to review progress of the data collection process. It is our understanding the City has allocated $25,000 for the sanitary sewer structure inventory task in its 2020/2021 fiscal year budget. Based on preliminary data provided by the City, it appears the sanitary sewer system is estimated to have 575 manhole structures, including 9 sanitary sewer lift stations. Based on the fee below, it is estimated that 465 structures of the 575 total structures can be inventoried for the budget allocated, equating to approximately 80 percent of the system. A. Sanitary Sewer System Inventory The Consultant will provide field personnel and equipment to collect existing sanitary sewer system data for creation of the final existing sanitary sewer system structure database. Field personnel will obtain information about existing sanitary sewer system structure components, including the following attributes, as readily accessible and visible at the Time of inventory: Location data using GIS mapping grade Global Positioning System equipment; ii. Sanitary sewer feature type (e.g. manhole, lift station, etc.); Measurements from frame to bottom of structure, inlet pipes and outlet pipes. Frame elevations will not be obtained in this scope of work; iv. Inlet/outlet pipe diameter, material and direction; and, Owner's Initials Consultant's Initials - Page 55- Item #7 City of Tybee Sanitary Sewer Structure Inventory August 12, 2020 Page 2 of 3 v. Miscellaneous field notes and photographs. The estimated structures to be inventoried is an estimate. The effort may be less or more, depending on the number of structures to be inventoried, as will be determined in the field. For this reason, we are providing a time and expense budget for this task. It would reduce effort of the field crew, thereby increasing number of structures inventoried for the proposed fee, if Tybee staff could accompany our field crew and open manhole covers prior to the field crew obtaining structure data collection. Consultant will notify City staff for assistance in accessing potentially inaccessible sanitary sewer structures. 11. FEE SUMMARY - PHASE 1 Phase Fee Structure Budget Sanitary Sewer Structure Inventory Existing Sanitary Sewer Structure Inventory Time & Expense $ 25,000.00 Sub -Total Budget -±80% Sanitary Sewer Structure inventory TOTAL PROJECT BUDGET - ± 80% SANITARY SEWER STRUCTURE III. EXCLUSIONS Items not included in the scope of services are as follows: $ 25, 000.00 $ 25,000.00 • Existing system modeling and report • Field survey • Water quality assessment or recommendations • Capital improvement plans • Operations & maintenance plans • Staffing level analysis • Design • Permit • Bid Phase/Process • Archaeological survey and report • Wetland delineation, surveys, or permits • Geotechnical investigation or report • Phase One or Phase Two Environmental Assessments • Endangered species survey and report • Interior Courtyard Design • ADA compliance • Off-site work unless specifically covered in the scope of services • Approvals or permits other than those related to the scope of work covered by this contract • Act as an expert witness for legal activities • Telephones, cable television, gas, and power distribution systems Owner's Initials Consultant's Initials - Page 56 - - Page 57 J Item #7. City of Tybee Sanitary Sewer Structure Inventory August 12, 2020 Page 3 of 3 IV. PERIOD OF SERVICE: Upon receipt of this executed task order from the Owner, Consultant will begin work within seven (7) calendar days, and complete work as described above within fiscal year 2020/2021. Schedule assumes the City issuing a Notice to Proceed no later than September 30, 2020. if acceptable, please indicate your authorization to proceed with this additional work by signing and initialing where designated below and returning a copy to us for our files. This proposal will be open for acceptance until August 30, 2020 unless changed by us in writing. This work order is subject to the terms and conditions of the contract executed for this project dated February 28, 2018 between the City of Tybee and Thomas & Hutton Engineering Co. When approved by both parties this Task Order becomes a legal document and a part of and subject to Terms and Conditions of said Contract. APPROVED: APPROVED: THOMAS & HUTTON ENGINEERIN�R CO. CITY OF TYBEE By: Mr. Kevin M. Smith, PE Title: Principal Title: Date: Date: �� a.2[7 %at1 Owner's Initials Consultant's Initials Ate, Alai ro74,4y