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HomeMy WebLinkAboutItem 14 - Master Drainage Plan UpdateITEM 0 MEMO TO: HONORABLE MAYOR AND MEMBERS OF THE CITY COUNCIL FROM: ROGER NELSON, CITY MANAGER C� ! MEETING DATE: JULY 16, 2002 SUBJECT: MASTER DRAINAGE PLAN UPDATE RECOMMENDATION: City Council consider approving an Engineering Services Contract with Turner, Collie & Braden, Incorporated to provide updating services for portions of the City's Master Drainage Plan in an amount not to exceed $65,000.00, authorize staff to execute said contract, and take any necessary action. FUNDING: Funds are available from Storm Drainage Certificate of Obligation Interest, account number 116-48941-535-1-000004. BACKGROUND: Staff has requested a proposal from Turner, Collie and Braden to develop an update of the storm -water study on Jones Branch in west Grapevine. The stream drains the fast developing areas of east Southlake and west Grapevine in the vicinities of NW Hwy and FM 1709. The Austin Oaks residents have expressed concerns over the flows in Jones Branch since the development in Southlake has begun. Erosion is becoming significant in the channel through the neighborhood and downstream to Dove Road. The proposal consists of field surveys of the stream channel throughout the length from SH 114 to Dove Road over a length of approximately 5,000 feet. The consultant will identify potential Section 404 jurisdictional areas, update the hydrologic and hydraulic models for Jones Branch, evaluate flood levels and velocities, and develop a mitigation plan. The consultant will also update the Masterplan's list of priority mitigation projects. Of the original 14 stream mitigation projects, 10 still need to be addressed. Additionally, Staff has identified four new sites as locations requiring future improvements. Based upon current conditions, the consultant will re-evaluate these locations with Staff input and develop updated priorities for the 14 sites. 0:\agenda\07-16-02\MDP Update July 10, 2002 (1:21 PM) Turner Collie OBraden Inc. Engineers • Planners • Project Managers July 3, 2002 Mr. Roger Nelson City Manager City of Grapevine 200 South Main Street Grapevine, Texas 76051 Attn: Mr. John D. Robertson, P.E. 1200 Summit Avenue Suite 600 Fort Worth, Texas 76102-4409 Tel: (817) 698-6700 Fax: (817) 698-6701 Re: Proposal for Professional Services for Jones Branch and Update of Master Drainage Plan, Grapevine, Texas Dear Mr. Nelson: », Turner Collie & Braden Inc. (TC&B) is providing this proposal to perform engineering and surveying services related to a Stream Mitigation Plan for Jones Branch and an update of the City of Grapevine Master Drainage Plan. A detailed scope of work and other agreement provisions are described as follows: SCOPE OF SERVICES See Attachment "A" COMPENSATION A breakdown of the budget is presented in Attachment B with a lump sum of $47,400 for engineering and environmental services. Surveying work will be performed on a reimbursable basis, with a maximum not to exceed $17,600. TC&B will not exceed this amount without your concurrence. Attachment D is a copy of TC&B's "Compensation and Liability Form" that provides information relevant to projects performed on a reimbursable basis. Payments will be due upon receipt of invoices prepared by our office and submitted not more frequently than a monthly basis. SCHEDULE TC&B is prepared to initiate the described work immediately upon your notification to proceed. The projected schedule for completion is presented in Attachment C. Established in 1946 Engineering Excellence for Over One -Half Century AN A E C 0 M CompA.Ny Mr. Roger Nelson July 2, 2002 Page 2 TERMS OF AGREEMENT This agreement may be terminated by either party for convenience upon 30 days written notice, or for cause if either party fails substantially to perform through no fault of the other and does not commence correction of such nonperformance within 5 days of written notice and diligently complete the correction thereafter. Upon delivery of such notice, TC&B shall, unless the notice states otherwise, immediately discontinue all Work, proceed to cancel promptly all existing orders and contracts insofar as such orders or contracts are chargeable to the Work, and deliver to you all work products under this agreement. Upon termination, you will owe TC&B for all compensation earned under this agreement to date of termination, plus reasonable termination expenses. This proposal is valid for a period of sixty (60) days. AUTHORIZATION TO PROCEED Two copies of the proposal are enclosed for your authorization. Please return of one signed copy of this Agreement, which will be sufficient to serve as our Authorization io Proceed. agreements, ether written represents the entire agreement and supersedes in its entirety y p or verbal, as they pertain to this proposal. We appreciate the opportunity to provide our services to the City of Grapevine on this project. Please call me at (8 17) 698-6715 if you have any questions regarding this proposal. Sincerely, � 4�'atrow, P.E. Technical Director Attachments Accepted: City of Grapevine By: Date: t1:\water\joemisc\2002\City of Gr2pevine\7-02-02 ATTACHMENT A l `' SCOPE OF WORK " ` UPDATE OF THE CITY OF GRAPEVINE MASTER DRAINAGE PLAN The purpose of this investigation is to develop a stream mitigation plan for Jones Branch from the city limits near SH 114 to Dove Road (study reach), and to update the list of priority stream mitigation alternatives presented in the City's Master Drainage Plan (draft) dated June 1995. The study reach of Jones Branch was not included in the priority list from the 1995 Master Drainage Plan. The study of Jones Branch will include detailed hydrologic and hydraulic modeling, but the updating of the priority master plan projects will be done by more approximate methods. A. Jones Branch 1) Collect and assess available hydrologic and hydraulic data including the models developed for the Master Drainage Plan, topographic data and as -built construction plans from the City, drainage plans from the TxDOT project on SH 114, and plans for current and future developments in the City of Southlake. 2) Preliminary Environmental Investigations a) Collect and review various information to help determine the existing conditions of the study reach relative to potential waters of the U.S. This information will include the following: * Pertinent U.S. Geological Survey quadrangle map(s) * National Wetland Inventory map * Tarrant County Soil Survey and hydric soil list * Readily available aerial photography b) Conduct a reconnaissance -level site visit and investigation of the study reach to identify and characterize potential Section 404 jurisdictional areas within the site. It is assumed that no more than four (4) representative observation points will be required. The boundaries of potential Section 404 areas will be either flagged in the field or approximated on a project area map. Characterization of potential waters of the U.S. (exclusive of wetlands) will be performed using USACE guidelines and standard criteria for determining such jurisdictional areas (i.e., streams, creeks, ponds, etc.). This investigation does not include a detailed evaluation (i.e., Wetland Determination Data Form), nor delineation of Section 404 jurisdictional limits. In the event that wetland areas are identified on the property, a general characterization of such areas will be performed. 3) Coordinate field surveys (by SURVCON INC., described in Section C) of Jones Branch between SH 114 and Dove Road. 4) Update the hydrologic model prepared for the Master Drainage Plan to incorporate any changes in land use or drainage system modifications which have occurred since 1991 (the time frame assumed in the Master Drainage Plan). w �� Attachment A — Scope of Work Update of Master Drainage Plan 5) Utilize the field surveys (from Section C) and any updated mapping and other geometric data acquired in Task 1 to revise the hydraulic model of Jones Branch prepared for the Master Drainage Plan, to incorporate the eroded channel condition that has occurred over the last few years. 6) Execute the revised hydraulic model using the flood discharges calculated in Task 4. Evaluate flood elevations and velocities calculated by the model to assist in formulating potential mitigation plans for the study reach of Jones Branch. 7) Coordinate with City personnel and possibly the "Stream Team" to assist in formulating a set of alternative (maximum of three) mitigation plans for the study reach. Develop conceptual plans using approximate (i.e., normal depth) hydraulic procedures. Only channel modification alternatives will be considered. Develop order -of -magnitude probable construction costs for each alternative. 8) In consultation with City staff, select a mitigation plan from the alternatives developed in Task 7. The plan may be a composite of the previously analyzed alternatives. Prepare a final set of proposed condition hydrologic and hydraulic models starting with the existing conditions models prepared in Tasks 4 and 5. Code cross-sections transitions and proposed structures into hydraulic model and refine to meet design water surface profile and velocity criteria. Evaluate hydrologic impacts for downstream or adjacent channel reaches, particularly for areas outside the City, using the hydrologic model, and define solutions if problems are determined. Define the conceptual configuration of any required energy dissipation structures . 9) Prepare a probable cost of the mitigation plan sized in Task 8. 10) Prepare a report describing the methodology and findings of the above-described studies (6 copies). B. Update of Priority Stream Mitigation Projects Of the fourteen (14) stream mitigation projects recommended in the Master Drainage Plan, the four in the Creek 23/Creek 17 system are under construction, leaving ten remaining priority projects. In addition, three other problem areas have been identified by City staff (Farris Branch, West Farris Branch, and Creek 21/Saybrooke), plus one problem area (Countryside Estates/Rustic Drive) which were identified as storm drain system mitigation projects in the Master Drainage Plan. These fourteen (14) projects will be evaluated and prioritized in consultation with City staff. No additional hydrologic and hydraulic analyses will be conducted for the previous ten stream mitigation projects and one storm drain mitigation project. However, conceptual hydraulic studies will be conducted for the three project sites where no analyses were performed for the Master Drainage Plan. The tasks included in the Master Drainage Plan update are listed below: 1) Conduct field inspections of each of the 14 sites. Interview City personnel to obtain available information concerning complaints and/or historic flooding. 2) Conduct approximate hydraulic studies of the three (3) sites that were not analyzed for the Master Drainage Plan. These studies will consist of evaluation Attachment A — Scope of Work Update of Master Drainage Plan of available hydraulic modeling and "normal depth" -type hydraulic analyses. Develop order -of -magnitude probable costs for these three projects. 3) Update probable costs of the remaining eleven (11) projects (10 stream mitigation and one storm drain mitigation). 4) In consultation with City staff, prepare a priority list of the revised fourteen -project list. Set up a "selection matrix" to assist in the prioritizing. 5) Prepare a brief report summarizing the findings of the above-described studies (6 copies). C. Field Surveys 1) Conduct surveys of Jones Branch from SH 114 northerly approximately 5,000 feet to Dove Road. Access points to the site are at the two roadways mentioned along with Austin Oaks Park. The area does not lend itself to being easily mapped. It is extremely wooded with very tough terrain. 2) Transfer City of Grapevine horizontal and vertical datum to site and establish benchmarks. 3) Using conventional ground surveying techniques and the Global Positioning System where possible, obtain twenty-three (23) cross-sections. 4) Deliverables will include digital files containing the surveyed points, ASCII file of coordinates, and a copy of the field notes. 5) The scope of field surveys can possibly be reduced depending on findings of the data collection task (Section A, Task 1). TASKS NOT INCLUDED IN THIS SCOPE OF WORK 1) Geotechnical investigations. 2) Preparation or'coordination of requests for Letters of Map Revision. 3) Coordination with USACE regarding Section 404 permitting or applications. 4) Plans and specifications. 5) Water quantity or quality monitoring. 6) Expert witness testimony. 7) Assistance with public hearings. ATTACHMENT B BUDGET FOR UPDATE OF THE CITY OF GRAPEVINE MASTER DRAINAGE PLAN A. Jones Branch Study 1. Data Collection and Assessment $ 1,850 2. Environmental Investigations $ 5,000 3. Coordinate Field Surveys $ 800 4. Update Hydrologic Model $ 5,350 5, Prepare Hydraulic Model $ 6,100 6. Calculate Revised Flood Data $ 1,700 7. Develop Alternatives $ 4,300 8. Select Stream Mitigation Plan $ 5,500 9. Prepare Probable Cost $ 1,100 10, Prepare Report $ 4,400 Subtotal $36,100 B. Update of Priority Stream Mitigation Projects 1. Conduct Field Inspections $ 2,200 2. Conduct Approximate Hydraulic Studies $ 2,100 3. Update Probable Costs $ 1,500 4. Prepare Priority List $ 2,200 5. Prepare Report $ 3,300 Subtotal $11,300 Total Study Budget $47,400 Field Surveys* $17,600 Total Budget $65,000 The full extent of the field surveys may not be required depending on the findings of the data collection and assessment task. ATTACHMENT C SCHEDULE FOR UPDATE OF THE CITY OF GRAPEVINE MASTER DRAINAGE PLAN TASK A. Jones Branch Study 1. Field Surveys 2. Draft Report 3. Final Report B. Update of Priority Stream Mitigation Projects 1. Updated Hydraulic Studies and Probable Costs 2. Draft Report 3. Final Report TIME OF COMPLETION 21 Days from Notice to Proceed 60 Days from Completion of Field Surveys 10 Days from Receipt of City Comments 30 Days from Notice to Proceed 45 Days from Notice to Proceed 10 Days from Receipt of City Comments ATTACHMENT D COMPENSATION AND LI.-',BILITY Engineering Services by Turner Collie & Braden Inc. A. For the services of the Engineer's staff and survey office personnel of Engineer's affiliate company, SURVCON INC. (except survey party personnel who are covered in paragraph 8), the charge will be the Salary Cost times a multiplier of 2.25 for time actually worked on the Project. Salary Cost is defined as a direct labor cost (salaries and wages) of the Engineer's employees so engaged plus 40 percent for social security contributions; unemployment, excise and payroll taxes; employment compensation insurance; retirement benefits; incentive pay; medical and insurance benefits; and sick leave, vacation, and holiday pay. Salary Cost will be computed on an hourly basis. The hourly direct labor cost of an employee compensated upon a salary rather than an hourly basis will be computed as follows: The employee's yearly salary, as of the time of performance of the work on the Project, shall be divided by 2,080 to determine an hourly direct labor cost. The charge for the services of the Engineer's officers will be computed as herein described, except that the hourly rate of the officers will not exceed $60.00 per hour. The overtime premium required by the Fair Labor Standards Act for nonexempt classifications will be charged for overtime hours worked because of the Client's requirements, and upon its specific authorization. B. For the Engineer's survey parties, (these parties are furnished by SURVCON INC., an affiliate company) the following schedule of rates, including standard instruments, applies for standard 8 -hour days, according to the instrumentation used: Standard Instrumentation: Two-man party $73.00 per hour Three-man party $94.00 per hour Four -man party $115.00 per hour Additional Rodman, Chainman or Flagman $21.00 per hour Control leveling instrumentation, paired lovar rods: $25.00 per day Total station wldata collector: $7.00 per hour Robotic total station: $18.00 per hour GPS RTK System: $68.75 per hour ($550.00 per day) GPS Static Receiver (each): $25.00 per hour All Terrain Vehicle (ATV) $175.00 per day Small Skiff $75.00 per day Small Skiff with motor $150.00 per day Skiff (18' of larger) with motor $350.00 per day These charges exclude nonlabor expenses as described in paragraph C below The standard 8 -hour workday includes round trip travel time between SURVCON's office and the work site. Variations in work time for nonstandard days, Saturdays, Sundays and holidays must be agreed to in writing before working. For all direct nonlabor expense, including surveying supplies, transportation, telegraph and telephone toll charges, reproduction, etc., and travel and subsistence for the Engineer's officers and staff, all as required for the proper execution of the work, and for all work subcontracted, the charge is the actual invoice cost plus a 10 percent service charge. Travel by vehicles owned or leased by Engineer or SURVCON INC. shall be at 50 cents per mile. For computer services on equipment owned or leased by the Engineer, the charge shall be at the following rates: CADD (Microstation) $15.00 per hour Plotting $1.30 per square foot For outside services, such as making soil borings and performing laboratory tests on soil samples, or retaining special consultants, Client may, at his option, contract directly with a third party for such services, or through Tumer Collie & Braden Inc. If such contracts are made through Turner Collie & Braden Inc., a handling charge of 10 percent will be added to the net amount of such contract. Payments to Engineer for authorized services will be due upon presentation of monthly statements by Engineer for such services. If, within 30 days of the date of any such statement, Client should fail to pay Engineer the full sum specified in any such statement, then the Client shall pay to Engineer, in addition to the sum shown as due by such statement, interest on any unpaid portion thereof at the rate of 12 percent per annum from the date of such statement until fully paid, which shall fully liquidate any injury to Engineer arising from such delay in payments, n ineer's liability for the negligent acts, errors, or omissions in the preparation of desi ns designation or selection selection and su a Ives and other personnel, or the performance 2Laa the amount of the total nameer Ear services rendered hereunder. H-201