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HomeMy WebLinkAboutContract 39609STATE OF TEXAS § COUNTY OF TARRANT § KNOWN ALL BY THESE PRESENTS: THIS AGREEMENT, entered into the _ , 2009 by and between the City of Fort Worth, a home -rule municipal corporation situated in Tarrant, Denton, Parker, and Wise Counties, Texas, acting herein by and through its duly authorized Assistant City Manager, hereinafter called the "City", and HDR, Inc., an independent contractor "Consultant". City and Consultant may be referred to herein individually as a Party, or collectively as the Parties. WITNESSETH That for and in consideration of mutual covenants and agreements herein contained, the Parties hereto mutually agree as follows: ARTICLE 1 SERVICES Section 1. Consultant hereby agrees to perform as an independent contractor the services set forth in the Scope of Services attached hereto as Attachment "A". These services shall be performed in connection with Prairie Dog Creek Open Channel Study No. SWS-026, Section 2. Additional services, if any, will be requested in writing by the City. City shall not pay for any work performed by Consultant or its subconsultants, subcontractors and/or suppliers that has not been ordered in writing. It is specifically agreed that Consultant shall not be compensated for any alleged additional work resulting from oral orders of any person. ARTICLE 2 COMPENSATION Consultant shall be compensated in accordance with the Fee Schedule shown in Attachment "B". Payment shall be considered full compensation for all labor, materials, supplies, and equipment necessary to complete the services described in Attachment "A". However the total fee paid by the City shall $ 242,134 unless the City and the Consultant mutually agree upon a fee amount for additional services and amend this Agreement accordingly. The Consultant shall provide monthly invoices to the City. Payment for services rendered shall be due within thirty (30) days of the uncontested performance of the particular services so ordered and receipt by City of Consultant's invoice for payment of same. OFFtGt�L RECORD CITY SECIRETfiRY FT. WORTH, TX Acceptance by Consultant of said payment shall operate as and shall release the City from all claims or liabilities under this Agreement for anything related to, done, or furnished in connection with the services for which payment is made, including any act or omission of the City in connection with such services. ARTICLE 3 TERM Unless terminated pursuant to the terms herein, this Agreement shall be for a term of 222 working days, beginning upon the date of its execution, or until the completion of the subject matter contemplated herein, whichever occurs first. ARTICLE 4 INDEPENDENT CONTRACTOR Consultant shall operate hereunder as an independent contractor, and not as an officer, agent, servant, or employee of the City. Consultant shall have exclusive control of and the exclusive right to control the details of its work to be performed hereunder and all persons performing same, and shall be solely responsible for the acts and omissions of its officers, agents, employees, contractors and subcontractors. The doctrine of respondent superior shall not apply as between City and Consultant, its officers, agents, employees, contractors, and subcontractors, and nothing herein shall be construed as creating a partnership or joint venture between City and Consultant. ARTICLE 5 PROFESSIONAL COMPETENCE AND INDEMNIFICATION Section 1. Work performed by Consultant shall comply in all aspects with all applicable local, state and Federal laws and with all applicable rules and regulations promulgated by the local, state and national boards, bureaus and agencies. Approval by the City shall not constitute or be deemed to be a release of the responsibility and liability of Consultant or its officers, agents, employees, contractors and subcontractors for the accuracy and competency of its services performed hereunder. Section 2. In accordance with Texas Local Government Code Section 271.904, the Consultant shall indemnify, hold harmless, and defend the City against liability for any damage caused by or resulting from an act of negligence, intentional tort, intellectual property infringement, or failure to pay a subcontractor or supplier committed by the Consultant or Consultant's agent, consultant under contract, or another entity over which the Consultant's exercises control. Professional Services Consultant Agreement Rev 10.6.09 ARTICLE 6 INSURANCE Section 1. Consultant shall not commence work under this Agreement until it has obtained all insurance required under this Article and the City has approved such insurance, nor shall Consultant allow any subcontractor to commence work on its subcontract until all similar insurance of the subcontractor has been so obtained and approval given by the City; provided, however, Consultant may elect to add any subconsultant as an additional insured under its liability policies. Commercial General Liability $1,000,000 each occurrence $1,000,000 aggregate Automobile Liability $1,000,000 each accident (or reasonably coverage if written on a split limits basis). any vehicle used in the course of the Project. Worker's Compensation Coverage A: statutory limits Coverage B: $100,000 each accident $500,000 disease - policy limit $100,000 disease - each employee Section 2. Additional Insurance Requirements eq uivalent limits Coverage shall be of on a. Except for employer's liability insurance coverage under Consultant's worker's compensation insurance policy, the City, its officers, employees and servants shall be endorsed as an additional insured on Consultant's insurance policies. b. Certificates of insurance shall be delivered to the Transportation and Public Works Department, Attention: Steven Eubanks, 1000 Throckmorton Street, Fort Worth, TX 76102, prior to commencement of work. c. Any failure on part of the City to request required insurance documentation shall not constitute a waiver of the insurance requirements specified herein. d. Each insurance policy shall be endorsed to provide the City a minimum thirty days notice of cancellation, non -renewal, and/or material change in policy terms or coverage. A ten days notice shall be acceptable in the event of non-payment of premium. e. Insurers must be authorized to do business in the State of Texas and have a current A.M. Best rating of A: VII or equivalent measure of financial strength and solvency. Professional Services Consultant Agreement Rev 10.6.09 Page 3 of 8 f. Other than worker's compensation insurance, in lieu of traditional insurance, City may consider alternative coverage or risk treatment measures through insurance pools or risk retention groups. The City must approve in writing any alternative coverage. g. Workers' compensation insurance policy(s) covering employees employed on the Project shall be endorsed with a waiver of subrogation providing rights of recovery in favor of the City. h. City shall not be responsible for the direct payment of insurance premium costs for Consultant's insurance. i. Consultant's insurance policies shall each be endorsed to provide that such insurance is primary protection and any self -funded or commercial coverage maintained by City shall not be called upon to contribute to loss recovery. j. In the course of the Agreement, Consultant shall report, in a timely manner, to City's officially designated contract administrator any known loss occurrence which could give rise to a liability claim or lawsuit or which could result in a property loss. k. Consultant's liability shall not be limited to the specified amounts of insurance required herein. 1. Upon the request of City, Consultant shall provide complete copies of all insurance policies required by these Agreement documents. ARTICLE 7 TRANSFER OR ASSIGNMENT City and Consultant each bind themselves, and their lawful successors and assigns, to this Agreement. Consultant, its lawful successors and assigns, shall not assign, sublet or transfer any interest in this Agreement without prior written consent of the City. I_IV71 Y [MIw Fff;? TERMINATION OF CONTRACT Section 1. City may terminate this Agreement for its convenience on 30 days' written notice. Either the City or the Consultant for cause may terminate this Agreement if either Party fails substantially to perform through no fault of the other and does not commence correction of such nonperformance with 5 days of written notice and diligently complete the correction thereafter Section 2. If City chooses to terminate this Agreement under Article 8, upon receipt of notice of termination, Consultant shall discontinue services rendered up to the date of such termination and City shall compensate Consultant based upon calculations in Article 2 of this Agreement and Exhibit `B" attached hereto and incorporated herein. Professional Services Consultant Agreement Rev 10.6.09 Section I All reports, whether partial or complete, prepared under this Agreement, including any original drawings or documents, whether furnished by the City, its officers, agents, employees, consultants, or contractors, or prepared by Consultant, shall be or become the property of the City, and shall be furnished to the City prior to or at the time such services are completed, or upon termination or expiration of this Agreement. ARTICLE 9 RIGHT TO AUDIT (a) Consultant agrees that the City shall, until the expiration of three (3) years after final payment under this Agreement, have access to and the right to examine any directly pertinent books, documents, papers and records of Consultant involving transactions relating to this Agreement. Consultant agrees that the City shall have access during normal working hours to all necessary facilities and shall be provided adequate and appropriate workspace in order to conduct audits in compliance with the provisions of this section. City shall give Consultant reasonable advance notice of intended audits. (b) Consultant further agrees to include in all its subcontracts hereunder, a provision to the effect that the subcontracting consultant agrees that the City shall, until the expiration of three (3) years after final payment under the subcontract, have access to and the right to examine any directly pertinent books, documents, papers and records of such subconsultant, involving transactions to the subcontract, and further, that City shall have access during normal working hours to all subconsultant facilities, and shall be provided adequate and appropriate work space in order to conduct audits in compliance with the provisions of this article. City shall give Consultant and any subconsultant reasonable advance notice of intended audit. (c) Consultant and subconsuitants agree to photocopy such documents as maybe requested by the City. The City agrees to reimburse Consultant for the cost of copies at the rate published in the Texas Administrative Code in effect as of the time copying is performed. ARTICLE 10 MINORITY AND WOMAN BUSINESS ENTERPRISE (M/WBE) PARTICIPATION In accordance with City Ordinance No. 15530, the City has goals for the participation of minority business enterprises and woman business enterprises ("M/WBE") in City contracts. Consultant acknowledges the NMBE goal established for this Agreement and its commitment to meet that goal. Any misrepresentation of facts (other than a negligent misrepresentation) and/or the commission of fraud by the Consultant may result in the termination of this Agreement and debarment from participating in City contracts for a period of time of not less than three (3) years. Professional Services Consultant Agreement Rev 10.6.09 Page 5 of 8 ARTICLE 11 OBSERVE AND COMPLY Consultant shall at all times observe and comply with all federal, state, and local laws and regulations and with all City ordinances and regulations which in any way affect this Agreement and the work hereunder, and shall observe and comply with all orders, laws ordinances and regulations which may exist or may be enacted later by governing bodies having jurisdiction or authority for such enactment. No plea of misunderstanding or ignorance thereof shall be considered. Consultant agrees to defend, indemnify and hold harmless City and all of its officers, agents and employees from and against all claims or liability arising out of the violation of any such order, law, ordinance, or regulation, whether it be by itself or its employees. ARTICLE 12 VENUE AND JURISDICTION If any action, whether real or asserted, at law or in equity, arises on the basis of any provision of this Agreement, venue for such action shall lie in state courts located in Tarrant County, Texas or the United States District Court for the Northern District of Texas — Fort Worth Division, This Agreement shall be construed in accordance with the laws of the State of Texas. ARTICLE 13 CONTRACT CONSTRUCTION The Parties acknowledge that each party and, if it so chooses, its counsel have reviewed and revised this Agreement and that the normal rule of construction to the effect that any ambiguities are to be resolved against the drafting party must not be employed in the interpretation of this Agreement or any amendments or exhibits hereto. ARTICLE 14 SEVERABILITY The provisions of this Agreement are severable, and if any word, phrase, clause, sentence, paragraph, section or other part of this Agreement or the application thereof to any person or circumstance shall ever be held by any court of competent jurisdiction to be invalid or unconstitutional for any reason, the remainder of this Agreement and the application of such word, phrase, clause, sentence, paragraph, section, or other part of this Agreement to other persons or circumstances shall not be affected thereby and this Agreement shall be construed as if such invalid or unconstitutional portion had never been contained therein. Professional Services Consultant Agreement Rev 10.6.09 ARTICLE 15 NOTICES Notices to be provided hereunder shall be sufficient if forwarded to the other Party by hand - delivery or via U.S. Postal Service certified mail return receipt requested, postage prepaid, to the address of the other Party shown below: City of Fort Worth Attn: Steven Eubanks Transportation and Public Works Department 1000 Throckmorton Street Fort Worth, Texas 76102 HDR, Inc. Attn: Gary Lee M�Kay, PE Project Manager 210E 3rd Street, Suite 300 Fort Worth, Texas 761024002 ARTICLE 16 HEADINGS The headings contained herein are for the convenience in reference and are not intended to define or limit the scope of any provision of this Agreement ARTICLE 17 COUNTERPARTS This Agreement maybe executed in one or more counterparts and each counterpart shall, for all purposes, be deemed an original, but all such counterparts shall together constitute but one and the same instrument. Professional Services Consultant Agreement Rev 10.6.09 (Remainder of Page Intentionally Left Blank) Page 7 of 8 IN WITNESS THEREOF, the parties hereto have made and executed this Agreement in multiple originals the day and year first above written, in Fort Worth, Tarrant County, Texas. CITY OF FORT WORTH: Fernando Costa Assistant City Manager RECOMMENDED: FC/ F Willian rk , P.E., Director Departm o Transportation and Public Work APPROVED AS TO FORM AND LEGALITY: Assistant Ci ATTEST: Attorney Marty Hendrix Ciry Secretary 1 0CA Date Professional Services Consultant Agreement Rev 10.6.09 HDR, INC.: Dennis W. Schulze, PE Vice President Contract Authorization bate OFFICIAL RECQRD CITY SECRETARY FI WORTH, TX PRIARIE DOG CREEK OPEN CHANNEL STUDY STUDY NO. SWS-026 Preface Over the years, the City of Fort Worth has experienced growth and development throughout. As a result, some of the current floodplain delineations and studies may be outdated. Some streams within the City were never studied in detail. The purpose of these open channel studies is to assess the existing conditions of select open channels and to develop a master plan of improvements as needed. The existing conditions analysis includes detailed hydrologic and hydraulic analyses to determine probable flooding areas during exceedance storms and a comparison of results to existing studies (if available). The revision or development of a master plan of improvements for the study area will include a set of conceptual improvement alternatives to minimize flood impacts to homes and buildings. These studies may require the submittal of a LOMR to FEMA if the resultant flood analysis is significantly different from the current flood insurance study delineation and base flood elevations. Because of the number of studies that will be conducted, the City would like to develop a standardized approach for consistent data management and model development. The City has embarked on the development of a GIS inventory of the existing storm water management system. These studies will have data that will be relevant to the City's ongoing GIS inventory. Therefore, the submittal of GIS data to the City is required. For data management purposes, all of the reports and detailed analyses will be submitted to the City in an approved format. A standardized approach to documentation, submittals and approach will assist the City with data management of these and future studies. ATTACHMENT "A" Page 1 of 19 ProleCt Summary a. Purpose of Study The purpose of this study is to 9. Develop detailed hydrologic model of the entire watershed using MRCS Method drained by Prairie Dog Creek, Tributary VC2A, and an open channel east of Miller and north of Martin. 2. Develop detailed hydraulic models of the entire reach of the Prairie Dog Creek beginning at the City of Fort Worth limits along Mansfield High Way, the Tributary VC-2A, and open channel reach north of Martin and east of Miller. 3. Develop a master plan for improvements necessary to protect homes and prevent roadway flooding during the 900-year storm; alternatives for channel improvements, detention, and buy-outs should be considered as appropriate 4. Develop scoping for any recommended minor projects, such as localized erosion repair along the creek The ENGINEER's services and products resulting from this study shall be referred to as 'Prairie Dog Creek Open Channel Study". The ENGINEER shall perform the project services in accord with (1) the Federal Emergency Management Agency floodplain modeling and mapping specifications and guidelines, (2) the City of Fort Worth Storm Water Management Design Manual, and (3) specific requirements and technical guidelines in this scope document. The City of Fort Worth Storm Water Management Design Manual shall be the prevailing document. b. Pertinent Data 5. The Prairie Dog Creek (FEMA Stream VC-2) flows from southwest of Mansfield Road in an easterly direction for about 2.6 miles and merges into Lake Arlington (City of Fort Worth Council District 5 & 8; Mapsco 92L-93L). There is a studied tributary (VC 2A) and an open channel to the main stem of Prairie Dog Creek. The Flood Insurance Rate Map (Map Number 48439C0440 J) showing the special flood hazard areas, was last revised on August 23, 2000. This FEMA effective model of Stream VC-2 shows extensive flooding outside of the existing channel, but it is not known how accurate that model is. There is also a pond close to the outfall of Prairie Dog and Lake Arlington and this will be modeled using steady state flows with no rating curves. ATTACHMENT "A" Page 2 of 19 Task I: Proiect Management The ENGINEER's project management activities shall include task leadership and direction, telephone and written communication, bkmonthly project update meetings, project status reports, project schedule and updates, and personnel and data management among other general project management activities. Any delays to the project schedule shall be in writing to the City of Fort Worth for review and approval. The ENGINEER shall attend the project kickoff meeting with a proposed schedule for task sequence and completion. The ENGINEER's Project Manager shall schedule and lead all project meetings. Meeting notes shall be submitted to the City of Fort Worth's Project Manager within five working days after each meeting. The ENGINEER shall attend [minimum of one, ENGINEER modify number according to project] public meeting to present what possible mitigation alternatives are being explored. The ENGINEER will provide to the City project information regarding proposed mitigation alternatives (if applicable) for public outreach. The ENGINEER will fully document all relevant hardware, software, file structures, and data formats used during the project. The details and structure to be followed are included in EXHIBIT A-1. The draft and final report format to be followed is included in EXHIBIT A-2. Other than intermittent meetings, all of the individual Task deliverables shall be submitted with the draft and final report at the conclusion of the study. The ENGINEER shall update a Project Certification and Decision Log to be submitted at the completion of the study. [ENGINEER: Add to project task unique activities particular to study that are beyond the standard scope.) Task 1 Deliverables: • Documentation o Summary of Tasks o Project Schedule o Support Data — Relevant meeting notes and email correspondence, project status updates, and action items for ENGINEER, sub -consultants, and the City of Fort Worth. o Completed Project Certification and Decision Log upon completion of the study. Task 2: Data Search, Collection, Field Reconnaissance, Stream Condition Assessment, and Surveys a. Dataset Search and Collection The City of Fort Worth will provide the ENGINEER with the following watershed data in GIS format, in addition to the available models and reports: stream centerlines, street centerlines, 2007 aerial imagery, 2007 terrain surface in LAS format, existing and future land use data, 2007 subbasin delineations (may not be delineated for each site), high - ATTACHMENT Page 3 of 19 water marks (if available), and zoning maps. Historical rainfall data and the as -built drawings of the hydraulic structures may be available from the City. The ENGINEER shall submit a written request to FEMA for all relevant available data from the effective Flood Insurance Study (FIS) including but not limited to: LOMRs, hydrologic and hydraulic data, reports, working maps, etc. The City shall determine the extent of the study along the stream. The ENGINEER shall use the City -provided watershed description, stream centerline, and 2007 terrain surface as part of the base data for modeling and mapping. If necessary, the ENGINEER may modify the stream centerline alignment during Tasks 3 and 4 according to topography, 2007 aerial imagery, or new survey data. Any errors identified or revisions made to the City's stream centerline and watershed boundary datasets shall be reported and discussed with the City's Project Manager. The ENGINEER will review and identify known flooding and drainage issues referred to as "hot spots" within the study area. The City will provide available drainage complaint reports to the ENGINEER. The identified "hot spots" shall be compiled into a GIS geodatabase. The City of Fort Worth's Storm Water Management Division shall assist the ENGINEER in locating required data available from the City, but the ultimate responsibility for identifying data needs and for finding, collecting, developing, analyzing, and creating all necessary data shall reside with the ENGINEER. If required data is unavailable, the ENGINEER shall inform the City in writing and discuss with the City's Project Manager for actions or determination. b. Field Reconnaissance The ENGINEER shall perform field reconnaissance to become familiar with the main stem, Tributary VC-2A, and the Miller open channel, all hydraulic and hydrologic structures, land use, vegetative cover conditions of the floodplain, and special features and problems within the watershed. The ENGINEER is aware that not all natural channels are contained within City easements therefore property owner permission must be obtained by the ENGINEER to access private property. The ENGINEER shall document their reconnaissance efforts findings with labeled digital photographs. Typical channel and over -bank types shall be photographed and labeled with location and Manning "n" value assumptions. The ENGINEER shall document physical characteristics of the watershed relevant to modeling, including but not limited to: specific features of all major detention ponds and outlet discharge structures, vegetative and built structure conditions along the floodplains, types and number of hydraulic structures involved, apparent maintenance condition of channels, over -banks and existing hydraulic structures, locations and descriptions of stream cross -sections to be surveyed (including bridge railings and obstructed flow areas). c. Stream Condition Assessment ATTACHMENT "A" Page 4 of 19 The ENGINEER shall perform a stream condition assessment as a result of field reconnaissance efforts and document the locations of observed erosive conditions, channel stability issues, channel side -slope failure, failed channel protection, sediment transport, and/or other observed failures. The ENGINEER may assign a rating of 'Excellent", "Good", "Fair", or "Poor". The ENGINEER shall document the stream conditions assessment efforts with labeled digital photographs. The ENGINEER shall populate a GIS geodatabase of identified areas of concern. d. Field Surveys All bridges, culverts, and critical stream cross -sections (having substantial change in channel geometry and/or bed slope in contrast to upstream or downstream cross. sections) should be surveyed. The field surveys shall include any headwalls and outfalls along the channel. The maximum stream length distance between any two surveyed cross -sections shall not exceed approximately 1,500 feet. The City's Project Manager shall review the number of open channel cross-section and hydraulic structure surveys prior to a final scope of work. [The ENGINEER is to include the number of open channel cross-section and hydraulic structure surveys in the final scope.] The ENGINEER shall follow the current version of FEMA Guidelines and Specifications for Flood Hazard Mapping Partners Appendix N: Data Capture Guidelines to collect field survey data for open sections, bridges, culverts, and dams. Benchmarks shall be located and recorded for survey control. Available elevation reference marks shall be located and recorded at surveyed hydraulic structures. If elevation reference marks can not be located, they may be set at each surveyed hydraulic structure as a chiseled mark in a headwall, wingwall, bridge deck, etc in a manner suitable for future reference. The ENGINEER shall establish primary and secondary control points for survey. Primary control points are typically iron rods that are suitable for future reference. Secondary control points are set at each surveyed cross-section and are intended to establish the primary control data at each cross- section. Secondary control points are typically nails and are not intended to be permanent. The current version of FEMA Guidelines and Specifications for Flood Hazard Mapping Partners Appendix N: Data Capture Guidelines shall be used a guide to setting elevation reference marks. Field surveys of stream cross -sections shall be representative of the natural ground of the channel and overbanks. Surveys of bridges, culvert, dams or other hydraulic structures shall be representative of the hydraulic structure's geometry. A typical ground cross-section shall be surveyed upstream of the structure. Measurements and survey points defining the geometry of the hydraulic structures shall all be recorded in field notes. Field survey notes shall represent graphically and clearly, in plan and profile view, what was surveyed, photographed, and recorded. All of the sketches should depict the upstream face of the structure as well as the direction of flow. ATTACHMENT "A" Page 5 of 19 Digital photos shall be taken at each surveyed stream cross-section looking upstream and looking downstream at the channel. Photos of the upstream and downstream faces of the hydraulic structures shall be taken along with the upstream and downstream channel. Wherever possible, the pictures should contain the entire face of the structure. The ENGINEER will use the survey codes and format outlined in the FEMA Guidelines and Specifications for Flood Hazard Mapping Partners Appendix N. Data Capture Guidelines for survey text files. The text files shall include point number, northing, Basting, elevation, and description. The ENGINEER shall submit the survey data as text files and in a GIS shapefile format. It is the responsibility of the ENGINEER to obtain property owner permission to perform surveys outside of City easements. The ENGINEER shall notify the local property owners that surveys and field reconnaissance will be conducted for a certain period time. e. Finished Floor Elevations The ENGINEER shall determine the finished floor elevations and lowest adjacent grades of buildings and residential homes within the current effective floodplain and anticipated revised areas. The ENGINEER shall meet with the City's Project Manager and discuss which buildings and homes will be surveyed prior to a final scope of work. Finished floor elevations shall be a separate budget item from the field surveys. ENGINEER: Add to project task unique activities particular to study that are beyond the standard scope.] Task 2 Deliverables: • Documentation o Data Collection —Summary of Data Collection efforts and methodology including a list %J data collected and sources and locations of reported flooding "hot spots" within the immediate study area. o Field Reconnaissance — Summary of Field Reconnaissance efforts including labeled digital photos and locations of special physical characteristics relevant to modeling and number and locations of crossings. o Stream Condition Assessment — Summary of assessment including labeled digital photos and locations of observed areas of concern. The ENGINEER shall include labeled digital photos and comments on conditions. o Field Surveys — Summary of field survey efforts including primary control points and locations, elevation reference marks, and locations of surveyed roadway crossings and open sections. o Finished Floor Elevations — Summary of finished floor elevation survey efforts including homes and structures surveyed, finished floor elevations, and lowest adjacent grade. • Digital Data ATTACHMENT "A" Page 6 of 19 o Data Collection — Data collected from the City and other sources for the study. o Field Reconnaissance — Labeled digital photos and locations of areas of concern. o Stream Conditions Assessment — Labeled digital photos and locations of areas of concern and a GIS geodatabase of identified areas of concern. o Field Surveys ■ Text Files: Survey text files in ASCII format of primary control points, secondary control points, elevation reference marks, surveyed hydraulic structures and stream cross -sections. ■ Field Notes: Field notes in PDF format of surveyed hydraulic structures and stream cross -sections. ■ Photos: Labeled digital photos of surveyed hydraulic structures and stream cross -sections. ■ GIS Files: Shapefiles of survey data of primary control points, elevation reference marks, and hydraulic structures and stream cross -sections. ■ Work Maps: Work maps depicting survey data and locations. o Finished Floor Elevations ■ Text Files: Survey text files in ASCII format of finished floor elevations and lowest adjacent grade. ■ Field Notes: Field notes in PDF format taken during survey efforts. ■ GIS Files: Shapefiles of survey data of finished floor elevations and lowest adjacent grade. ■ Work Maps: Work maps depicting survey data and locations. o ENGINEER will provide all the finished floor survey data including control, finished floor elevations lowest adjacent grade elevations and locations, GIS files, field notes, and ASCII text files. • One set of CD/DVDs containing electronic versions of all information (intermediate and final data and photos) gathered in this Task. Task 3: Development of Detailed Hydrologic Models The ENGINEER shall develop detailed existing land -use conditions (and/or ultimate - development land -use conditions based on 2009 comprehensive plan if applicable) HEC-HMS models for the watershed. The City will determine if ultimate development land -use conditions are warranted for the study. The ENGINEER may use HEC- GeoHMS as a preprocessor to provide base information for the new hydrologic model. The hydrologic model shall be fully geo-referenced for seamless incorporation into the City's GIS inventory. The ENGINEER shall fully annotate the HEC-HMS model, including descriptive comments in all relevant fields, and clearly label the simulation runs with respect to the return period. The ENGINEER shall coordinate any occurrence of inter -basin transfer of flow with the City's Project Manager. If knowledge of inter - basin transfer of flows is known during the preparation of the scope, the ENGINEER shall provide details on how the hydrology and hydraulics will be modeled. ATTACHMENT "A" Page 7 of 19 The ENGINEER shall use the 2-, 5-1 10-, 25-3 50-, 100-, and 500-year return events to develop hydrologic and hydraulic models, water surface elevation profiles, and floodplain maps. If the basin is fully developed then ultimate land -use conditions will be assumed as "Existing Conditions". The ENGINEER shall model the 100-yr return event for ultimate conditions if existing conditions in the basin are not fully developed. The ENGINEER shall use representative historical rainfall data to perform hydrological analysis to perform a high water mark simulation/validation with hydraulic models. a. Rainfall The ENGINEER shall use a 24-hour duration storm (SCS Type II or frequency) for the meteorological model and shall use the City of Fort Worth Storm Water Management Design Manual Appendix A rainfall depth -duration -frequency tables. b. Data Sources The ENGINEER shall review the current effective hydrologic and hydraulic models, Letters of Map Revision (LOMRs) approved after the current effective FIS study and City of Fort Worth land development projects and incorporate them into the study as appropriate. The ENGINEER may obtain "as built" drawings from the City (if available) for constructed regional ponds and other large residential and commercial ponds to be modeled. The stage -storage -discharge (SSD) rating curve for these ponds used in the model shall be verified as being accurate. If necessary, the SSD curves may be re- developed. In all cases, the SSD rating curve shall be the same for both the hydrologic and hydraulic models. The existing land -use conditions data, the 2009 projected future (ultimate) development land -use conditions dat(3, topographic data (2007 ACS surface data), and the latest Natural Resources Conservation Service (NRCS) Soil Survey Geographic (SSURGO) database shall be used in the hydrologic model development. c. Model Development The ENGINEER shall coordinate watershed boundaries with other concurrent studies. The subbasin size shall not exceed one-third of a square mile. Use of larger subbasins shall be discussed with the City's Project Manager. Break points (junctions) may be set at certain locations if requested by City's Project Manager. The ENGINEER shall conduct a "working session" with City staff to finalize watershed basin boundaries and junctions. If a conflict exists on a watershed boundary determination, it is usually the topographic data, not the storm drain system that determines the watershed boundaries. However, if storm drain trunk lines or any other diversion/by-pass hydraulic structures exist in the watershed and divert a significant amount of flow from one basin to another, those hydraulic structures shall be modeled in the study. ATTACHMENT "A" Page 8 of 19 The SCS unit hydrograph shall be utilized for developing the HMS model. The TR-55 equations and curves for estimating the time of concentration for overland (sheet) flow, shallow concentrated flow, and channel flow shall be used. Overland (sheet) flow length shall be no more than 50 — 100 feet for urban land -use conditions. The ENGINEER shall delineate and depict the longest flow path per subbasin and include the length and time of concentration per segment. The SCS curve number method shall be used for loss rate estimation. The ENGINEER shall prepare a table of impervious cover percentages and curve numbers for various land uses and soil conditions based on the City of Fort Worth Storm Water Management Design Manual. The runoff curve numbers for open space and undeveloped areas shall be based on the cover type and hydrologic condition of "Open Space, Good Condition." The composite curve number for each subbasin shall be computed based on a composite percentage of soil types. For modeling the existing land -use conditions of a suburban watershed, the impervious cover percentage shall be determined based on zoning districts. Impervious cover percentages per zoning district are listed in Table 1. The ENGINEER shall use the NCTCOG existing land -use spatial data and City 2007 aerial imagery to confirm that the current zoning districts have an accurate land use assignment. It is the ENGINEER's responsibility to properly determine the impervious cover percentage for sparsely located farmland houses which may or may not be directly connected to a surface drainage system. The ENGINEER shall use the City 2009 comprehensive plan to determine the impervious cover percentage for ultimate conditions for future growth and development. The composite impervious cover percentage and soil -based composite runoff curve numbers for each subbasin shall be summarized in a table of subbasin parameters. Table 1. City of Fort Worth Suburban Existing Land Use Impervious Cover Land -use Code Land -use Description Average Percent Impervious AG Agricultural 35 CF Community Facilities 85 DD Demolition Delay 85 HC Historic and Cultural 85 HSE Highly Sig. Endange. 85 MH Manufactured Housing 65 PD Planned Development 85 A-2.5A One Family (min 2.5 acre) 35 A-43 One Family (min 1 acre) 35 A-21 One Family (min 0.5 acre) 37 AA One Family (min 10,000 sq. ft.) 49 ATTACHMENT "A" Page 9 of 19 A-T5 One Family min 7,500 sq. ft. 55 A-5 One Family min 5,000 sq. ft. 61 AR One Family Restricted min 3,500 sq. ft. 65 B Two Family 65 R1 Zero Lot Line/Cluster 65 R2 Townhouse/Cluster 65 CR Low Density Multifamily 40 C Medium Density Multifamily 55 D High Density Multifamily 65 MU-1, MU-1G Low Intensity Mixed -Use 96 MU-2, MU-2G High Intensity Mixed -Use 96 TU Trinity Uptown 96 ER Neighborhood Commercial Restricted 96 E Neighborhood Commercial 96 FR General Commercial Restricted 96 F General Commercial 96 G Intensive Commercial 96 H Central Business 96 I Light Industrial 96 J Medium Industrial 96 K Heavy Industrial 96 d. Routing The ENGINEER shall use the Modified Puls or the Muskingham-Gunge routing methods to attenuate the runoff hydrograph. Other routing methods shall require the approval of the City. e. Depth -Area Analysis Depth -Area Analysis (areal reduction) shall be used for watersheds with a drainage area of 9.6 square miles or greater. If necessary, peak flow tables for each return period and for both existing and future land -use conditions will be provided with peak flows computed at all subbasin outlets and hydrologic junction points with areal reduction for drainage areas (in square miles) of 0.0, 10, 20, 30, etc. up to the total watershed area. The peak discharge will be interpolated based on the drainage area at the appropriate junction location. The following is an example of the table. ATTACHMENT "A" Page 10 of 19 100-Year Peak Flows (cfs) Under Existing Land -Use Conditions Hydrologic Element Drainage Area (sq mi) Storm Area 0 mi2 Storm Area 10 mi2 Storm Area 20 mi2 Storm Area 30 miz J160W 7.576 12140 11610 11150 10770 J160K 8.011 12160 11750 11360 11030 JWCR160 15.587 22230 21460 20770 20190 WCR160 15.587 22070 21320 20620 20020 J130W 15.767 22110 21350 20660 20060 JWCR130 17.91 24390 23570 22810 22090 JWCR120 18.364 24820 23990 23210 22470 WCR1100 18.364 24680 23840 23050 22350 JWCR1170 18.78 24790 23950 23160 22450 WCR120 18.78 24730 23890 23100 22410 To estimate the 100-year peak flow at the junction J130W, one may code a linear interpolation formula in an Excel Spreadsheet to linearly interpolate the 100-yr peak flow at this junction location, e.g., Q(J130W)=21350+(15.767-10)/(20-10)*(20660- 21350)=20952 cfs. f. Results The model results shall be compared to available reliable recorded/historical runoff data, data, including historic storm events. If no reliable recorded/historical rainfall - runoff data is available, the ENGINEER may run checks with other sources of data such as the local/regional regression equations, Current Flood Insurance Study, or the USGS's frequency -based 100-year peak flow versus watershed drainage area curve for similar watersheds. If significant differences are found, adjustments to the hydrologic model may be required. The ENGINEER shall prepare a table of peak flow rates for each of the return events analyzed. The ENGINEER shall compare the peak flows from the new study to those of the current effective (if available). The comparisons shall be summarized in the report. The ENGINEER shall document the methodologies and assumptions for each subbasin, details of calculating the time of concentration, subbasin and longest flow path delineations, creek centerline, software, and data sources used, any significant changes in flows between the old and new hydrologic models with an explanation of differences, and a table containing peak flows at each subbasin, junction, and pond location with areal reduction (if applicable), and any special technical issues and resolutions. Task 3 Deliverables: • Documentation o A summary of the Task and a description of methodologies and assumptions used. The detailed summary shall include design criteria, ATTACHMENT "A" Page 11 of 19 software used, source data, watershed delineation method, watershed parameters, modeling considerations, and any special technical issues and resolutions. o A summary of results and a comparison with effective discharges. o Any relevant correspondences, discussions, and technical decisions regarding model development including review comments and special issues. • Digital Data o Hydrologic Model: One digital copy of the final, working, and fully - annotated HEC-HMS hydrologic model that provides peak flow rates for the 2-, 5-2 10-1 25-1 50-, 100-, and 500-year floods together with all supportive GIS and modeling data (including DSS files) for the HEC-HMS models (current non -beta HEC-HMS version at time of delivery). o GIS Data: Supportive GIS and modeling data including the watershed delineation, longest flow path. (If applicable) An ArcGIS 9.2 or later version of a personal geodatabase containing all final vector information developed under this task. o Support: Electronic versions of all information gathered, supporting materials and data in developing the hydrologic models, and work products created in this task, such that the models can essentially be duplicated with the backup data. • The ENGINEER shall submit two sets of DVDs containing electronic versions of all information gathered and work products created in this task. Task 4: Development of Hydraulic Models and Floodplain Maps The ENGINEER will use the latest HEC-RAS model software to develop hydraulic models for the study. The ENGINEER may use HEC-GeoRAS as a preprocessor to provide base information to the hydraulic model and as a post -processor to map the floodplains. The ENGINEER shall fully annotate the HEC-RAS model, including descriptive comments in all relevant fields, and clearly label the flow data profiles with respect to return period. Cross -sections or bridge/culvert structures that incorporate survey data shall include the survey data source, date and hydraulic structure name in the cross section data description. The ENGINEER may use FEMA's CHECK-RAS program to do an initial verification of the HEC-RAS models and address the issues it finds or provide an explanation of why a correction was unnecessary. The hydraulic model will be fully geo-referenced for seamless incorporation into the City 's GIS inventory. a. Model Development The ENGINEER shall prepare the models to run under steady state conditions. The ENGINEER will meet with the City's Project Manager to determine whether an unsteady state model is warranted. Surveyed bridges, culverts, and critical stream cross -sections (having substantial change in channel geometry or slope) shall be incorporated into the HEC-RAS model. ATTACHMENT "A" Page 12 of 19 Other non -critical stream cross -sections shall be cut from the City's topographic data (if available) or the most accurate topographic data available. The cross-section layout shall be set in a reasonable manner consistent with the respective DFIRM (if available) taking into consideration hydraulics and floodplain mapping. As a general guideline, spacing between any two cross -sections shall not exceed approximately 200 ft unless directed by the City's Project Manager. The ENGINEER will conduct a "working session" with the City staff to review cross -sectional cut -line locations and layout. The ENGINEER will proceed with detailed hydraulics following City's review of the cross- section cut -line layout or as directed by the City's Project Manager. The ENGINEER shall discuss with the City's Project Manager whether channel invert interpolation between surveyed cross -sections is required. Interpolated cross -sections shall be kept to a minimum. If interpolated cross -sections are used in the development of the models, each section shall be labeled and described in the model and identified on a work map of the cross-section layout. The ENGINEER shall describe in the written the report the purpose of the interpolated cross -sections. All cross-section stations and reach lengths shall be rounded to the nearest foot. The ENGINEER shall assign Manning's n-values to a specific channel or over -bank area based on actual physical conditions using information from field reconnaissance, aerial photos, and the City of Fort Worth Storm Water Management Design Manual n- value reference tables. Composite n-values are recommended for the left overbank, channel, and right overbank. Caution will be exercised not to over- or under -estimate the "n" values. The composite "n" value in over bank flow areas shall be limited to 0.15. For any "n" value exceeding 0.15, the ENGINEER shall inform and discuss with the City's Project Manager for a final decision. It is recommended that the ENGINEER use the HEC-RAS functions of "blocked obstruction" and "ineffective flow area" whenever to enhance the model. The ENGINEER shall recreate or confirm the limits of the floodway. A floodway will not be evaluated or created for study areas that do not have an existing floodway. b. Flow Data Peak flows computed from a hydrologic model with proper areal reduction (if applicable) shall be put into the hydraulic model as close as possible in terms of location, e.g., subbasin junction location in HEC-HMS versus cross-section location in HEC-RAS. A table showing the HEC-RAS cross-section flow change locations and the corresponding HEC-HMS junction name shall be provided. The peak flow shall be the same in both models. In the case that a creek or channel runs through a subbasin in a hydrologic model (see an example attached below), the additional outflow from the subbasin shall be proportionally inserted in one of the following two methods: (Method 1) at 1/3 or at 2/3 of the channel segment within the subbasin, or (Method 2) approximately at middle of the channel segment (Figure 1). ATTACHMENT "A" Page 13 of 19 Figure 1. Flow Change Locations If the ENGINEER determines that either procedure will not accurately represent the additional flow between hydrologic analysis points, the ENGINEER shall inform and discuss with the City's Project Manager flow change locations. c. Results If data is available, model results shall be compared with recorded stage levels or checked against known high water marks. The model results shall also be compared to known flooding events. If significant differences are found, adjustments to the hydraulic model may be required. The ENGINEER shall document all methodologies and assumptions, software used, data sources, problem areas, and significant changes in water surface elevations between the old and new hydraulic models. The ENGINEER will eliminate crossing profiles; however, given the number of profiles (for existing and future conditions) and the potential for minimal differences in computed flow rates, it is possible that some minor crossing of profiles cannot be resolved. The ENGINEER will coordinate these issues with the City staff. The ENGINEER shall produce an updated or new floodway data table. The lettered section should correspond with the locations of the effective study, ATTACHMENT "A" Page 14 of 19 The ENGINEER will produce water surface elevation profile plots for the 10-, 50-, 100-, and 500-year flood frequencies using FEMA RASPLOT 2.5 or later. The ENGINEER shall reference the existing Flood Insurance Study profile plots for plot scale. The ENGINEER shall delineate the floodway and the 100- and %J 0 yr floodplains through the study area. If applicable, the 100-yr floodplain for ultimate conditions will also be delineated. The ENGINEER shall produce work maps that show the following minimum information in and near the floodplains: (1) Cultural features, such as railroads, airfields, streets, roads, public schools, highways, levees, dikes, dams and other flood -control structures, and other prominent man-made features and landmarks; (2) Hydrographic features, such as rivers, streams, lakes and ponds, and channels (including both banks of a stream when graphically possible); (3) Corporate limits, extraterritorial jurisdiction limits, and boundaries of excluded areas; (4) Elevation reference marks (ERM), and (5) Grid lines (State Plane North Central Texas Survey Feet) with appropriate values annotated. Base Flood Elevations (BFEs) will be generated and shown by wavy line contours drawn normal to the direction of the flow of water, perpendicular to the floodplain, but not necessarily perpendicular to the stream centerline. They shall extend completely across the existing conditions 100-year floodplain. Each BFE notation shall indicate its elevation (NAVD88) to the nearest whole foot. (ENGINEER: Add to task pro]ect unique activities particular to study that are beyond the standard scope.] Task 4 Deliverables: • Documentation o A summary of the Task and a description of methodologies and assumptions used. The detailed summary shall include design criteria, software used, source data, cross -sections, modeling considerations, and any special technical issues and resolutions. o A summary of results and a comparison with effective water surface elevations. Include floodplain and floodway delineations and BFEs. One set of hard copies of the floodplain maps, separated by existing and future land use conditions, preferably printed in the format of DFIRM panels. o Any relevant correspondences, discussions, and technical decisions regarding model development including review comments and special issues. • Digital Data o Hydraulic Model: One digital copy of the final, working, geo-referenced, and fully -annotated HEC-RAS hydraulic model that provides peak flow rates for the 2-, 5-1 10-1 25-1 50-1 100-, and 500-year floods together with all supportive GIS and modeling data for the RAS models (current non - beta HEC-RAS version at time of delivery). o GIS Data: Supportive GIS and modeling data including the stream centerline, cross -sections, floodplain delineations, and BFE's. (If ATTACHMENT "A" Page 15 of 19 applicable) An ArcGIS 9.2 or later version of a personal geodatabase containing all final vector information developed under this task. o Support: Electronic versions of all information gathered, supporting materials and data in developing the hydraulic models, and work products created in this task, such that the models can essentially be duplicated with the backup data. PDF format files of the floodplain maps, separated by existing and ultimate land use conditions, preferably in the format of DFIRM panels. PDF format files and DWG files of the RASPLOT profiles. • The ENGINEER shall submit two sets of DVDs containing electronic versions of all information gathered and work products created in this task such that the models and floodplain maps can essentially be duplicated. Task 5: Watershed Flood Hazard Assessment The ENGINEER shall assess the capacity of stream roadway crossings and summarize flooding hazards at the stream roadway crossings. The ENGINEER shall provide an estimate of the number of roadway crossings inundated and depth of inundation for each return event analyzed. The ENGINEER shall document the results from the watershed flood hazard assessment. �ENG/NEER: Add to task project unique activities particular to study that are beyond the standard scope.] Task 5 Deliverables: • Documentation o A summary of the flood hazards within the watershed including all of the stream roadway crossings with general address, description of roadway crossing, roadway crest elevation, reach, HEC-RAS river station, and depth of flooding for the existing and fully developed storms. • Digital Data o (If applicable) An ArcGIS 9.2 personal geodatabase containing all final vector information developed under this task. Task 6: Proposed Flood Mitigation Alternative Analysis The ENGINEER shall assess the conditions of the study area and revise or develop a master plan of proposed improvements and flood hazard mitigation. Alternatives to be considered will include but are not limited to open channel improvements, detention, and property buy-outs and building/house removal. This task will consider flooding issues identified in Task 5 to determine the potential flood reduction benefits of flood mitigation. The ENGINEER shall determine appropriate acquisition data based on current available appraisal district data. [ENGINEER to estimate the number and type of alternatives to be included in the analysis in conjunction with City staff.] ATTACHMENT "A" Page 16 of 19 The ENGINEER shall develop and discuss realistic preliminary alternatives with the City's Project Manager prior to analysis. The ENGINEER shall then evaluate the preliminary alternatives discussed and make necessary revisions. The ENGINEER shall discuss the revised alternatives with the City's Project Manager before finalizing the conceptual mitigation alternatives. The alternatives may be finalized prior to the public meeting discussed in Task 1. City utility crossing potential conflicts shall be considered and identified in the development of the alternatives. The ENGINEER shall document all methodologies and assumptions used to analyze the conceptual flood mitigation alternatives and significant changes in water surface elevation between the existing conditions model and the improvement alternatives model. Any modifications to the hydrologic features developed for Task 3 as a result of the improvements shall be discussed with the City's Project Manager. The ENGINEER shall rerun routing for the alternatives. A benefit cost analysis (BCA) shall be conducted using the FEMA Mitigation BCA Toolkit Version 3.0 (July 2006). The ENGINEER shall use a discount rate of 7% and a project life of 50 years. The ENGINEER will evaluate the BCA based on the storm events outlined in Table 1 and the potential damages to residential, commercial, and industrial structures. The benefit cost analysis may be used to prioritize the mitigation alternatives. The conceptual opinions of probable cost shall include a contingency cost of thirty (30) percent and engineering and surveying cost of ten (10) percent. (ENGINEER: Add to task project unique activities particular to study that are beyond the standard scope.] Task 6 Deliverables: • Documentation o A summary of the Task and a description of methodologies and assumptions used. The detailed summary shall include design criteria, software used, source data, cross -sections, modeling considerations, and any special technical issues and resolutions. o A summary of results and a comparison with existing water surface elevations from Task 4. o Any relevant correspondences, discussions, and technical decisions regarding model development including review comments and special issues. • Digital Data o Hydrologic Model: (if applicable) One digital copy of the final, working, and fully -annotated HEC-HMS hydrologic model (if different from Task 3) that provides peak flow rates for the 2-, 5-, 10-, 25-3 50-, 100-, and 500-year floods together with all supportive GIS and modeling data (including DSS files) for the HEC-HMS models (current non -beta HEC-HMS version at time of delivery) ATTACHMENT "A" Page 17 of 19 o Hydraulic Model: One digital copy of the final, working, geo-referenced, and fully -annotated HEC-RAS hydrologic model that provides peak flow rates for the 2-, 5-3 10-1 25-3 50-, 100-, and 500-year floods together with all supportive GIS and modeling data for the RAS models (current non - beta HEC-RAS version at time of delivery). o GIS Data: Supportive GIS and modeling data including the stream centerline, cross -sections, floodplain delineations, and proposed conceptual alternatives. (If applicable) An ArcGIS 9.2 or later version of a personal geodatabase containing all final vector information developed under this task. o Support: Electronic versions of all information gathered, supporting materials and data in developing the hydraulic models, and work products created in this task, such that the models can essentially be duplicated with the backup data. PDF format files of the floodplain maps preferably in the format of DFIRM panels. • The ENGINEER shall submit two sets of DVDs containing electronic versions of all information gathered and work products created in this task such that the models and floodplain maps can essentially be duplicated. Task 7: Quality Assurance and Quality Control Procedures The ENGINEER shall develop a QA/QC procedure meeting or exceeding the requirements of FEMA for FEMA Digital Floodplain Insurance Rate Mapping projects. The QA/QC program shall include a multi -level approach to ensure that senior members of ENGINEER's staff review, comment, and approve the completed work. Quality control check lists shall be created for the survey, hydrology, hydraulics, and mapping elements of the work. Each checklist shall include milestone review events that describe the items to be reviewed and include documentation of the comments by the reviewer and responses from the ENGINEER's Project Manager. All project materials presented to the City as draft or final products must be accompanied by QA/QC certification or they will be rejected by the City. Work on a task shall not proceed until the milestone event has been reviewed and all necessary revisions to the data are complete. The checklists shall be signed by the senior task leader, Project Manager, and the Principal, and are included in the FINAL REPORT. The ENGINEER shall provide copies of their QA/QC efforts to the City of Fort Worth. The ENGINEER shall retain all work products generated and information gathered and used during the course of the project. This includes, but is not limited to, base data (such as City of Fort Worth's base terrain data) as well as intermediate work products (e.g. the fill grid used in the hydrologic preprocessor, draft reports, etc.). These items shall be transmitted to the City of Fort Worth Project Manager by the end of the project. Task 7 Deliverables: • Documentation o Upon completion of the project, the ENGINEER shall submit signed digital and hard copies of the QA/QC checklists. ATTACHMENT "A" Page 18 of 19 Task U. Letter of Map Revision Application and Support (if required) The ENGINEER shall prepare a LOMR application package with complete supporting documentation. Following the City `s review and approval, the ENGINEER shall represent the City to submit the LOMR application to FEMA. The ENGINEER will provide the City two copies of the final LOMR application package. The City will be responsible for the payment of FEMA's LOMR review and processing fees. The LOMR application typically includes the following forms although others may be required for the floodplain restudy: Form 1 Overview &Occurrence Form 2 Riverine Hydrology and Hydraulics Form Form 3 Riverine Structures Form The ENGINEER shall respond to comments made by FEMA on the LOMR application package. Based on the comments received, the ENGINEER shall make necessary revisions to the LOMR submittal package and address all comments and provide additional required information to fulfill FEMA requirements for issuance of a of the FEMA LOMR for this study, if applicable. Task 8 Deliverables: • Documentation o Two copies of the completed LOMR application package. • Digital Data o Digital copy of the completed LOMR application package PROJECT Schedule The project (excluding FEMA review of LOMR if required) should be completed within twelve months after receiving the Notice to Proceed letter from the City. The ENGINEER has attached a schedule of tasks within a time frame of 12 months. ATTACHMENT "A" Page 19 of 19 EXHIBIT "A-1" 1J11111»�►ail=UNLL= a ii_Td:l►�il Uz_\! PRIARIE DOG CREEK OPEN CHANNEL STUDY STUDY NO. SWS-026 The following standards and specifications for hardware, software, file structure, and data format are specified for consistent data management and model development. Any other hardware, software, file structure, and data formats must be compatible with the applications currently used by the City and require the approval of the City. Software: Operating System: Microsoft Windows XP Professional SP2 (32-bit) or later version Office Productivity: Microsoft Office 2003 or later Document Imaging: Adobe Acrobat 7.0 or later GIS Packages: ESRI ArcGIS Desktop 9.2 or later GIS Extensions: Spatial Analyst, 3D Analyst Hydrologic Model GIS Preprocessor: HEC-GeoHMS Hydraulic Model GIS Preprocessor: HEC-GeoRAS 4. Hydrologic Model: HEC-HMS 3.0.1 or later Hydraulic Model: HEC-RAS 3.1.3 or later 1.1 1 or later or later FEMA Preparation Software: CHECK-RAS 1.4, RASPLOT 2.5 or later Others if specified, must be agreed upon by the City Data File Formats: Reports: Reports will be provided in Microsoft Word 2003 format or later, with all images, maps, graphs, tables, etc. embedded in the document so that an exact duplicate of hard copy reports can easily be created. Also, a duplicate PDF version of the report shall be created for archival purposes. Graphs and Tables: Tabular information will be provided in Excel 2003 format (or later) and in Access 2003 database format (or later) when a small database is required. If an enterprise database is deemed necessary, Oracle 91 or later shall be used. ASCII Text Files: All ASCII text files (other than model inputs and outputs) will be encoded using ANSI -encoding and will have the file extension ".TXT". Text files containing comma -delimited information will have the file extension ".CSV". Digital Photographs: All photographs taken for the project will be in digital form, at least 1600 X 1200 resolution, full color, and saved in the JPG file format. Dates and times will be saved in the image, and file EXHIBIT "A-1" Page 1 of 3 names will be descriptive (i.e. WMS_XS_20343_US.JPG, not IMG014.JPG). Photos of the channel or cross -sections shall be labeled as to direction of flow. Scanned Documents: Scanned documents will be provided in Adobe PDF format, with the entire document appearing in a single file (not individual PDFs for individual pages or for chapters). Bookmarks to chapter beginnings and other important pages will be provided in the PDF. GlS Spatial Data File Formats: All GIS vector data layers (points, lines, polygons, etc.) shall be provided in one of the following three ArcGIS compatible formats: personal or file geodatabase (preferred), shapefile, or coverage. Continuous surface model data (i.e. DEMs or DTMs) shall be in ESRI's GRID or TIN format. The City will provide the elevation data for each study area plus a 500 foot buffer in the LIDAR LAS binary file format. Aerial photography or other raster imagery will be provided in a common GIS image format (preferably GeoTIFF), with appropriate header information and a world file for georeferencing. If large amounts of raster images are required for the project, and image catalog will be created and provided to the city. All GIS data, and other files containing coordinates, shall use the State Plane coordinate system set to the Texas North Central (4202) zone. The horizontal datum shall be the North American Datum of 1983 (NAD83) and the vertical datum shall be the North American Vertical Datum of 1988 (NAVD88), both the horizontal and vertical units shall be in feet. All surveyed data shall be captured or converted to grid coordinates. If conversion is required, the surface to grid conversion factor shall also be provided. All GIS datasets shall have the projection defined either internally (geodatabases) or with a projection file (shapefiles). A FGDC compliant metadata file shall be provided for each GIS dataset. This metadata will be compatible with ArcCatalog and saved in XML format. Data accuracy shall be reported and checked using NSSDA standards instead of other older standards like WAS or ASPRS. All submitted data files must not contain any server link references to the server network and file folders. File Structure and File Names: All files created in this project will be descriptively named, within the limits of the software. Underscores will be used in place of spaces in file names. File structure should look like the following: EXHIBIT "A-1" Page 2 of 3 n J O 01_Report _j Correspondence J Data Collected Figures _j Misc Photos _j Tables =i _J 02_5urvey J Field_Notes Photos Spatial_Data _) Text_Files - 03_Models J Hydraulic_Models _j Hydrology_Models O 04_Spatial_Data _j Hydraulic _j Hydrology _j 05_Profiles 06_Flood_Maps EXHIBIT "A-1" Page 3 of 3 EXHIBIT "A-2" (SUPPLEMENT TO ATTACHMENT A) STUDY NO. SWS-026 Table of Contents Task 1: Project Management • Summary of Tasks • Support Data • Project Certification and Decision Log. Task 2: Data Search, Collection, Field Reconnaissance, Stream Conditions Assessment, and Surveys • Data Search and Collection o Methods o Hot Spots o Data Sources o LOMC • Field Reconnaissance o Methodology o Special Physical Characteristics • Stream Conditions Assessment o Methodology o Identified Areas of Concern • Surveys o Control o Field Survey Methodology o Finished Floor Elevations Task 3: Development of Detailed Hydrologic Models • Task Summary o Introduction o Performance Work Statement o LOMC Incorporation • Methodology o Detailed Summary ■ Summary of Methodology ■ Design Criteria ■ Software o Drainage Basin Delineation EXHIBIT "A-2" Page 1 of 5 ■ Topographic Data ■ Delineation Method o Collected Data ■ Precipitation ■ Structure Outflow, Elevation, Storage Curves o Modeling Considerations ■ Drainage Area Parameters ■ Soil Types and Land -use ■ Runoff Losses ■ Time of Concentration ■ Unit Hydrograph ■ Channel Routing • Result and Conclusions o Summary of Results o Comparison of Effective Discharges with Study Discharges Task 4: Development of Hydraulic Models and Floodplain Maps • Task Summary o Introduction o Performance Work Statement o LOMC Incorporation • Methodology o Detailed Summary ■ Summary of Methodology ■ Design Criteria ■ Software o Cross -Sections ■ Locations and Layout Considerations ■ Method to Obtain Cross -Sections ■ Bridges, Culverts, and Road Crossings o Modeling Considerations ■ Starting Water Surface Elevation ■ Structure and Road Crossing Modeling ■ Islands and Split Flows ■ Ineffective Flow Areas ■ Calibration ■ Floodway ■ Special Problems • Results and Conclusions o Floodplain Delineation and Mapping ■ Method of Delineation ■ Base Flood Elevations Results o Summary of Results o Comparison of Existing WSELs with Study WSELs Task 5: Watershed Flood Hazard Assessment EXHIBIT "A-2" Page 2 of 5 • Task Summary • Findings Task 6: Proposed Flood Mitigation Alternative Analysis • Task Summary o Introduction o Performance Work Statement • Methodology o Detailed Summary ■ Summary of Methodology ■ Design Criteria ■ Software o Cross -Sections ■ Locations and Layout Considerations ■ Method to Obtain Cross -Sections ■ Bridges, Culverts, and Road Crossings o Modeling Considerations ■ Starting Water Surface Elevation ■ Structure and Road Crossing Modeling ■ Islands and Split Flows ■ Ineffective Flow Areas ■ Calibration ■ Floodway ■ Special Problems • Results and Conclusions o Floodplain Delineation and Mapping o Summary of Results o Comparison of Existing WSELs with Study WSELs Task 7: Quality Assurance and Quality Control Procedures • Task Summary • QA/QC Procedure o Task 1 o Task 2 o Task 3 o Task 4 o Task 5 o Task 6 o Task 8 • City Notification Task 8: Letter of Map Revision Application and Support • Task Summary • Application Forms EXHIBIT "A-2" Page 3 of 5 APPENDICES APPENDIX A - Figures • Task 2 — Figures o Stream Condition Assessment Photos o Stream Condition Assessment Locations o Control Points o Surveyed Structures and Cross -sections o Surveyed Finished Floor Elevations • Task 3 — Figures o Overall Study Area o Drainage Area Map o Hydrologic Soils Map o Land-Use/Zoning Map o Longest Flow Paths and Time of Concentrations o Peak Discharge Vs. Drainage Area • Task 4 — Figures o Overall Study Area o Floodplain Maps o Profiles • Task 5 — Figures o Crossings • Task 6 — Figures o Overall Study Area o Floodplain Maps o Profiles APPENDIX B —Supporting Documents • Task 1 — Supporting Documents • Task 2 — Supporting Documents o GPS Survey Documentation • Task 3 — Supporting Documents o Land -use Classifications o Composite Curve Number Calculations o Lag Time Calculations o Routing Parameters o Curves o Results • Task 4 —Supporting Documents o As -Built plans o Summary of Discharges o Floodway Data Table o Results • Task 5 —Supporting Documents o Table of crossings inundated per study storms • Task 6 — Supporting Documents o As -Built plans EXHIBIT "A-2" Page 4 of 5 o Summary of Discharges o Floodway Data Table o Results • Task 8 — Supporting Documents o Completed LOMR application package (if applicable, submitted at a later date.) • PDF of final report APPENDIX C — QA/QC • Task 2 — QA/QC Forms • Task 3 — QA/QC Forms • Task 4 — QA/QC Forms • Task 5 — QA/QC Forms APPENDIX D —Digital Data • Task 2 — Digital Supporting Data o Stream Conditions Assessment Data o Survey Data o Spatial Data o Figures • Task 3 — Digital Supporting Data o Hydrologic Models o Spatial Data o Figures • Task 4 — Digital Supporting Data o Hydraulic Models o Spatial Data o Figures and Maps • Task 5 — Digital Supporting Data o Figures and Maps o Spatial Data o Support Data • Task 6 — Digital Supporting Data o Hydraulic Models o Spatial Data o Figures and Maps • Task 8 — Digital Supporting Data o Completed LOMR application pa however, may be ckage EXHIBIT "A-2" Page 5 of 5 ATTACHMENT "0 PRAIRIE DOG OPEN CHANNEL STUDY STUDY NO. SWS-026 COMPENSATION AND PAYMENT SCHEDULE A. The Engineer shall be compensated a total project fee of $242,134. Payment of the total lump sum fee shall be considered full compensation for the services described in Attachment "A" for all labor materials, supplies and equipment necessary to complete the project. B. The Engineer shall be paid in accordance with "Exhibit B-1 ", Supplement to Attachment B. Each invoice from the Engineer shall be verified as to its accuracy and compliance with the terms of this contract by an officer of the Engineer. C. A summary of current hourly billing rates is provided in Exhibit "B-2". Any other tasks that are not included in the Scope will be billed on an hourly basis. The tasks will not be performed without written authorization from City. D. Professional Services Fee summary is provided in Exhibit "B-3". E. ANA Consultants, LLC is an MWBE and will perform all surveying services for 16% of the total fee. Refer to Exhibit "13-3A". F. Schedule of partial submittals for review: a. Project Management (Task 1) after 222 working days. b. Data Collection (Task 2) after 70 working days. c. Hydrology (Task 3) after 70 working days. d. Hydraulic Models and Floodplain Maps (Task 4) after working 110 days. e. Watershed Flood Hazard Assessment (Task 5) after 135 working days. f. Proposed Flood Mitigation Alternative Analysis (Task 6) after 135 days. g. Report after 222 days. ATTACHMENT "B" Page 1 of 1 EXHIBIT "B-1" (SUPPLEMENT TO ATTACHMENT B) I�Z�I71�Z�7 • ► ._►► � 1 PROGRESS REPORT REQUIREMENTS Method of Payment Partial payment shall be made to the Engineer monthly upon City's approval of an invoice from the Engineer outlining the current labor and expenses of the total project. The aggregate of such monthly partial fee payments shall not exceed the following: Total lump sum project fee of $242,134.00 The balance of fees, less previous payments, shall be payable after delivery of the FINAL report and electronic files. II. Progress Reports A. The Engineer shall submit to the designated representative of the Director of the Department of Transportation/Public Works monthly progress reports covering all phases of the analysis in the format required by the City. B. Periodic reports concerning MWBE participation shall be submitted as required by the MWBE Office. EXHIBIT "B-1" Page 1 of 1 EXHIBIT "B-2" (SUPPLEMENT TO ATTACHMENT B) PRAIRIE DOG OPEN CHANNEL STUDY STUDY NO. SWS-026 A summary of current hourly billing rates is provided below: Principal -in -Charge $225 Project Manager $205 Senior Professional Engineer $175 Junior Professional Engineer $140 Engineer -in -Training $105 Sr. GIS $120 Jr. GIS $85 Engineering Intern $55 CADD Technician $80 Clerical $85 EXHIBIT "B-2" Page 1 of 1 EXHIBIT "B-3" (SUPPLEMENT TO ATTACHMENT B) PRAIRIE DOG OPEN CHANNEL STUDY PROFESSIONAL SERVICES FEE SUMMARY TASK FEE Task 1: Project Management $31,340 Task 2: Data Search, Collection, Field Reconnaissance, Stream Condition Assessment, $23,375 Task 2: Field Surveys of Hydraulic Structures $19,300 Task 2: Finished Floor Elevations $18,800 Task 3: Development of Detailed Hydrologic Models $42,460 Task 4: Development of Hydraulic Models and Floodplain Maps $37,239 Task 5: Watershed Flood Hazard Assessment $10,920 Task 6: Proposed Flood Mitigation Alternative Analysis $42,760 Task 7: Quality Assurance and Quality Control Procedures $15,940 SERVICE TOTAL $242,134 EXHIBIT "B-3" Page 1 of 1 EXHIBIT "B-3A" (SUPPLEMENT TO ATTACHMENT B) PRAIRIE DOG OPEN CHANNEL STUDY SUMMARY OF TOTAL PROJECT FEES Consulting Firm Prime Responsibility Amount Percent PRIME ENGINEER (HDR): Hydrology / Hydraulics $2043034 84.3% SUB ENGINEER (ANA): Field Surveying $38,100 15.7% Project Description Scope of Services Total Fee MWBE Fee Percent [ANA Consultants, LLC] $242,134 $38,100 15.7% SUB ENGINEER. shall participate in performing portions of the following Tasks as outlined in Attachment "A": Field surveying for hydraulic cross sections, structures and finished floor elevations. Non-MWBE Participation ►f�t•TiL! 0% EXHIBIT "B-3A" Page 1 of 1 ATTACHMENT "C" PRAIRIE DOG OPEN CHANNEL STUDY �'� ill ��'l� C����i►� AMENDMENTS TO STANDARD AGREEMENT FOR ENGINEERING SERVICES 1-Amendments to standards agreement for engineering services -None ATTACHMENT "C" Page 1 of 1 ATTACHMENT "C-1" PRAIRIE DOG OPEN CHANNEL STUDY STUDY NO. SWS-026 AMENDMENTS TO THE STANDARD SCOPE OF SERVICES, ATTACHMENT "A" 2.c. EROSION HAZARD ASSESSMENT AND CONTROL During a reconnaissance field observation in the course of development of the present scope of work, it has been noted that there is substantial bank erosion along the 3 miles of the main channel area. A field and qualitative stream stability assessment will be performed and compared with the hydraulic model to determine areas of hazard to bank or bed failure and areas of potential property damage. These findings will be documented and illustrated in the GIS floodplain workmap and the ENGINEER will prepare the solution alternatives. The ENGINEER will meet with the City to determine which areas need to be restored. Once the solution is chosen, the ENGINEER will document all methodologies and alternatives for the design phase of the project. 2.d. Field Surveys ANA will use the survey codes and format outlined in the FEMA Guidelines and Specifications for Flood Hazard Mapping Partners Appendix lV. Data Capture Guidelines for survey text files. Subtask 1. Survey of Cross -Sections Approximately 28 stream cross -sections will be obtained over the 3.0 miles of study area for Prairie Dog Creek and 5 stream cross sections for Stream VC-2A. The maximum total length of each section is 250 feet or to the nearest property fence line. All sections are shown in the attached Exhibit VC-2 (Prairie Dog Creek). This Exhibit provides ANA with a sketch for details of the cross sections including common nomenclature and locations of measurements. All stream cross -sections shall be representative of the natural ground of the channel and over -banks. The limits of ground -based survey for sub -task 1 extend from SH-287 and Prairie Dog Creek at the upstream end to the downstream end at the confluence with Lake Arlington. Stream VC-2 survey extends from SH-287 at the upstream end to the confluence with Prairie Dog. ATTACHMENT "C-1" Page 1 of 2 Subtask 2.. SUrvey of Culverts, Bridges, Dams and Other Structures All culverts, bridges and other structures such as headwalls and outfalls (as shown in Exhibit E) will be tied. Culverts will include inverts, dimensions, material, top of headwall, and top of road upstream and downstream at culvert ends. Detailed hand drawn sketches of each culvert face will also be created for HDR. Bridges will include pier dimension and location, abutment dimensions at each end, bottom deck width and elevation (both ends), top of deck elevation (one shot at the upstream end), stream invert and toe of channel locations at 25400t intervals. All dam spillways will be tied with longitudinal and lateral length, material, edge of water, and invert flowline. The following is the list of bridges/culverts/dams to survey: Hydraulic Structures to be Surveyed —Prairie Dog Main Stem 1 Weir structure located just East of US820 adjacent to Big Fork Road. 2 Loop 820 box culverts. 3 Parker Henderson Rd. Bridge 4 Parker Henderson Rd. upstream weir structure 5 Nell St. bridge 6 Miller St. bridge 7 Trentman St. bridge 8 Shackleford St. bridge 9 Nolan St. culvert Hydraulic Structures to be Surveyed — Stream VC=2 1 Martin St. culvert 2 Concrete Channel and dissipater concrete blocks 3 Woodbridge Drive culvert Hydraulic Structures to be Surveyed — Miller Avenue Trib. 1 Fair Lane Avenue culvert 2 Eastover and Nell Avenue culverts Task As Proposed Flood Mitigation Alternative Analysis The ENGINEER shall assess the conditions of the study area and revise or develop a master plan of proposed improvements and flood hazard mitigation. HDR will recommend a maximum of 2 alternatives once Task 5 is complete. Example alternatives could be acquisition of houses within the flood plain or widening of the channel area. Task 8: Letter of Map Revision Application and Support (if required) If the results of the study of existing conditions warrant a submission of a LOMR to FEMA, HDR is prepared to provide a fee proposal upon request. ATTACHMENT "C-1" Page 2 of 2 E 0 u 2 L O E _ _ 41 Q - u: ..:�:P .". ....... .... .." :.:.: IMIN N �9t ENm 00 m a` m m c m w m IA N N Zvi yi O F ILLL LL LL li C c 1% LL 0 a a a a F 3 3 3 3 .- 0 m - Y Q Q O m E o ci E o m Q w m = ¢ ¢ m c $ = u m a c LL M m _ O 9 m a a U m m IL k d O LL y LL LL 2 S O ILL W LL O N m L U a 0 th m D A66 `•li' Y Y y Y m 2 Y f- F IT H IT F- F- 12 K E16 �� J+ • �•I I Y F WrA� W — - 0 o e cal M&C Review Page 1 of 2 CITY C®UNCIL AGENDA COUNCIL ACTION: Approved on 11/17/2009 Official site of the City of Fort Worth, Texas FORT_ �� DATE: 11/17/2009 REFERENCE C-23924 LOG 20SWMPRAIRIEDOGCREEKPLAN NO.: NAME: CODE: C TYPE: NON- PUBLIC NO CONSENT HEARING: SUBJECT: Authorize the Execution of an Agreement with HDR Engineering, Inc., in the Amount of $242,134.00 for the Prairie Dog Creek Master Plan and Storm Water Study RECOMMENDATION: It is recommended that the City Council authorize the City Manager to execute an Agreement with HDR Engineering, Inc., in the Amount of $242,134.00 for the Prairie Dog Creek Master Plan and Storm Water Study. DISCUSSION: In order to address stream flooding, detailed open channel studies are required to determine runoff rates and flow depth, to verify and correct Federal Emergency Management�Agency (FEMA) Flood Insurance Rate Maps and to develop a master plan for each stream consisting of channel improvements, detention and other measures which can remove buildings from the floodplain and make roadway crossings safer. In November 2007, a request for qualifications was advertised for open channel studies. Twenty- three statements of qualifications were received and HDR Engineering, Inc., was selected to prepare the Prairie Dog Creek Master Plan, Storm Water Study SWS-026, in order to address roadway, home and business flooding along this creek. The scope of work will include a detailed study of the stream to reflect current conditions, developing a watershed master plan for future improvements to reduce flooding and identification of erosion repair and other minor projects which may be needed. HDR Engineering, Inc., proposes to perform this study for slump -sum fee of $242,134.00. City staff considers this fee to be fair and reasonable for the scope of services proposed, based on the size of the watershed and length of the stream. The Storm Water Utility Operating Fund will be used to fund this study. HDR Engineering, Inc., is in compliance with the City's M/WBE Ordinance by committing to 16 percent M/WBE participation. The City's goal for this project is 16 percent. This project is located in COUNCIL DISTRICT 5. FISCAL INFORMATION/CERTIFICATION: The Financial Management Services Director certifies that funds are available in the current operating budget, as appropriated, of the Storm Water Utility Fund. TO _Fund/Account/Centers FROM.. Fund/Account/Cente_rs P E69 531200_ _0209202 $242,134.0.0 http://apps.cfwnet.org/council packet/mc review.asp?ID=12037&councildate=ll/17/2009 M&C Review Page 2 of 2 Submitted for Ci Manager's _Office bx Originating Department Head: Additional Information Contact: ATTACHMENTS SWS-026 Prairie Dog_Ma�.pdf Fernando Costa (6122) William Verkest (7801) Greg Simmons (7862) htto://apps.cfwnet.or�/council packet/mc review.asp?ID=12037&councildate=ll/17/2009