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HomeMy WebLinkAboutWORK ORDER - GENERAL CORRESPONDENCE - 1620102/29/2003 21:03 9702260121 Work Order Number: MBF01-03 ANDERSON CONSU EXHIBIT "A" WORK ORDER FORM PURSUANT TO AN AGREEMENT BETWEEN THE CITY OF FORT COLLINS AND Anderson Consulting Engineers, c. DATED; May 25, 1999 PAGE 02/02 PD 33 0/7o5 *ldao[ ' 50 2804.528180.3 Project Title: Old Town Basin Master Drainage Pigp — Selected pi 50 I si Commencement Date: FebrUa2003 Completion Date: 1 Maximum Fee: (time and reimbursable direct costs): $55,256 Peject Description;, Preparation of the Selected Plan and the 50-year alternative for the Old Town Ma ter Dralnaoe Scope of Services: of work Service Provider agrees to perform the services Identified above and on the attached forms in accordance with the terms and conditions contained herein and in the Services Agreement between the Parties. In the event of a conflict between or ambiguity in the terms of the Services Agreement and this work order (Including the attached forms) the Services Agreement shall control. The attached forms consisting of Ave (5) pages hereby accepted and Incorporated herein by this reference. and Notice to Proceed Is hereby given. CC: Purchasing "$iWrvice Provider: 13y. Date: Tv a City of Fort Collins: -:4.H Bv: l'; u 2 Approved B �2 iger te: 3 Z/ ZrI/v Scope of Work for the Page 1 of 6 Old Town Basin Selected Plan of Improvements EXHIBIT A SCOPE OF WORK for OLD TOWN BASIN SELECTED PLAN OF IMPROVEMENTS I. GENERAL A. Background The Old Town Basin is located in north -central Fort Collins, Colorado, and is characterized as the area between the Cache la Poudre River on the northeast, the West Vine Basin on the northwest, the Spring Creek Basin on the southeast and south, and the Canal Importation Basin and Larimer County Canal (LCC) No. 2 to the west. The basin encompasses 2,120 acres, including approximately 400 acres on the Colorado State University campus. For all practical purposes, the basin is entirely urbanized with primarily residential and commercial development; however, land use also includes the main CSU campus, parks, open space along the Poudre River, parks, and isolated areas of industrial development. B. Purpose Recent hydrologic and hydraulic modeling of the basin, including floodplain mapping, was completed by Anderson Consulting Engineers, Inc. as documented in the May 2002 reports, "Old Town Basin Master Drainage Plan, Baseline Hydrology and Baseline Hydraulics." The Problem Identification phase of the Old Town Creek Basin Master Drainage Plan was completed in May 2002. Conceptual alternatives were formulated and evaluated for the basin as documented in the July 2002 report. A detailed feasibility evaluation of specific conceptual alternatives was completed and documented in a draft report dated December 2002. The current phase of the master planning effort includes the documentation of the selected plan of drainage improvements for the Old Town Basin, and formulation and evaluation of an alternative system of improvements within the basin based on the 50-year event. II. TECHNICAL EVALUATION OF THE SELECTED PLAN Alternative No. 3 from the alternatives feasibility analysis will be modified to create the Selected Plan of Improvements. These modifications will include: (a) revisions to the Oak Street Outfall extension to accommodate the addition of a storm sewer lateral along Shields Street from Mountain Avenue to Laporte Avenue; (b) replacement of the Maple Street Lateral with a storm sewer along Cherry Street from the Howes Street Outfall west to Grant Avenue, including laterals to serve Maple Street; and (c) identification of an alternative to the currently proposed storm sewer in the vicinity of Mulberry Street and Riverside Avenue. In addition to the conceptual design of the improvements/modifications identified above, all technical analyses conducted as part of the alternatives feasibility analysis will be completed for the Selected Plan of Improvements. These analyses will include: (1) hydrologic modeling of the ANdERSON Colmuh Nq Elvq&EE/2f, INC. Scope of Work for the Page 2 of 6 Old Town Basin Selected Plan of Improvements basin with the Selected Plan of Improvements; (2) hydraulic analyses of the affected flow paths; (3) evaluation of flood damage reduction; (4) preparation of project costs; and (5) a benefit -cost analysis. III. SELECTED PLAN OF IMPROVEMENTS A. Written Summary A written summary will be provided which will clearly describe the following: 1. The components of the selected alternative including: (a) structural improvements (approximate sizes and types of improvements); (b) water quality/habitat enhancement and groundwater issues; (c) development criteria for undeveloped and redeveloping land (i.e., on -site detention requirements, water quality requirements); and (d) floodplain criteria, if unique to the basin; 2. A discussion of issues associated with impacts to compensatory storage in the basin; 3. A discussion of issues associated with operation and maintenance aspects of the selected plan of improvements; 4. Recommendations for the installation of additional flood warning gages, either in proposed project areas of other locations within the basin; 5. A discussion of any deviations from City criteria or requirements; 6. A description of any required phasing of improvements in the basin as well as any isolated improvements (major or local improvements) that could be implemented independent of other improvements; 7. A summary of costs associated with the selected alternative by improvement areas divided into the following: (a) construction costs; (b) right-of-way costs; (c) design and administration costs; and (d) contingency costs; 8. An explanation of the benefit -cost analysis, including project life and interest rates used; and 9. An explanation of which indirect and/or intangible benefits/costs were considered and how or if dollar values were assigned; ANdbn" COwvh,%N(j EAKj&FERS, INC. Scope of Work for the Page 3 of 6 Old Town Basin Selected Plan of Improvements B. Tabular Presentation of Results Tables will be provided in the documentation to summarize the following information: 1. Estimated capacity of proposed storm sewers; and 2. Existing street flows versus estimated street flows assuming improvements are in place. C. Maps, Drawings, and Illustrations Maps, drawings, and illustrations will be provided in support of the written summary. The maps, drawings, and illustrations will be presented such that they are legible when reproduced in a black and white, 11" x 17" format. The drawings will be prepared in AutoCAD per the Master Planning map standards. It is noted that for this phase the maps, drawings, and illustrations will not be converted to a GIS format. The maps, drawings, and illustration will provide, at a minimum, the following information: 1. The selected plan's components and the extent of existing condition flooding for the 100- year event flows; 2. Approximate locations where the existing floodplain will be reduced when projects are built (not residual floodplain mapping), while damages will likely be reduced in these areas damages will not necessarily be eliminated; and 3. Typical cross sectional information and details (e.g. street cross sections with proposed storm sewers and existing sanitary sewers. D. Submittal of Documents 1. The summary will be submitted in a three-ring binder(s). Two (2) draft copies of the Selected Plan Summary will be submitted to the City of Fort Collins for review. 2. After review and acceptance of the draft submittal of the Selected Plan Summary, two (2) copies of the completed final submittal of the Selected Plan Summary will be provided to the City for further distribution. 3. All text, tables, maps figures, etc. will be included on CD-R and will be submitted along with the final submittal of the Selected Plan Summary. E. Technical and Backup Documentation 1. All technical and backup information similar to that prepared during the Feasibility Alternatives phase of this study will be prepared for the selected alternative and provided with the Selected Plan Summary. 2. All documents, drawings, plans, reports, studies, surveys, maps, photographs, photographic negatives, specifications, work notes, worksheets, data and other materials ANd£RfON COnwb&Q ENgIN££2f, INC. Scope of Work for the Page 4 of 6 Old Town Basin Selected Plan of Improvements prepared, made, compiled or used by the Professional hereunder, whether finished and completed or not, shall be the property of the City and may be reproduced, distributed and published in whole or in part without permission or any additional payments or fees to the professional or others. Upon completion of services provided for hereunder, or upon termination of this Agreement, said documents, drawings, plans, reports, studies, surveys, maps, photographs, photographic negatives, specifications, work notes, worksheets, data and other materials, whether finished and completed or not, shall be delivered to the City by the Professional, and organized in such a manner as to permit it to be easily identified. F. Schedule 1. The schedule for the completion of the work is indicated below; tasks are referenced to the project budget (Exhibit B): • Task 1 Selected Plan of Improvements, Draft 02/28/2003 Selected Plan of Improvements, Final 04/11/2003 • Task 2 50-Year Plan of Improvements 04/17/2003 2. The Professional shall submit work called for to the City for written approval by the City. The City will provide approval or the reason for the lack thereof, within forty-five (45) days after each submittal. 3. The Professional shall provide a progress report on budget and schedule on a weekly basis. 4. Prior to the City furnishing such approval to the Professional, the City will obtain as applicable, comments from any other parties to this Agreement. G. Documentation The City will appoint a Project Manager who shall represent the City in matters related to the work under this Agreement. The Professional shall identify key staff for the Agreement. It shall be the Professional's responsibility to document all meetings and telephone conversations between the Professional and any representatives of the City and, within three (3) days, deliver documentation to the City Project Manager. H. Quality Control It is understood and agreed that all work performed under this Agreement shall be subject to inspection and approval by the Stormwater Division of the City of Fort Collins, and any maps or data not meeting the specifications set forth in the Agreement will be replaced or corrected at the sole expense of the Professional. The Professional will meet with the City staff monthly and will be available for public hearings and/or presentations. AN&RsoN Co whiNq &ghmms, INC. Scope of Work for the Page 5 of 6 Old Town Basin Selected Plan of Imarovements IV. 50-YEAR PLAN OF IMPROVEMENTS Analyses will be performed to develop a plan of improvements based on the 50-year event utilizing improvement components similar to those described in the Selected Plan Summary. Since the Selected Plan of Improvements does not provide 100-year protection for the basin, this analysis will focus on leaving approximately the same discharge in the street during the 50-year event as would be left in the street during the 100-year event with implementation of the Selected Plan of Improvements. A. Formulation of the 50-Year Plan of Improvements A plan of improvements will be formulated based on the 50-year event within the Old Town Basin. This plan will parallel, to the extent possible and applicable, the selected plan of improvements. This analysis will focus on leaving approximately the same discharge in the street during the 50-year event as would be left in the street during the 100-year event with implementation of the Selected Plan of Improvements. B. Hydrologic and Hydraulic Analyses Hydrologic models will be prepared for the 10-, 50- and 100-year events assuming fully developed conditions and implementation of the 50-year drainage improvement plan, with upstream Master Plan improvements. The hydrologic models will be used to evaluate the operation of the 50-year improvement plan for a range of rainfall events. Hydrologic conditions will be defined for the 10-, 50- and 100-year events, including discharge profiles within the Old Town Basin. The 10- and 100-year hydraulic analyses will be revised to reflect the 50-year plan of improvements. Water surface profiles will be defined for the two return periods. C. Benefit/Cost Analysis A benefit/cost analysis for the 50-year plan of improvements will be conducted. Residual damages will be determined for the 10- and 100-year events using the depth -damage spreadsheets developed as part of the Problem Identification Phase. The analysis will include the following: Benefits (Direct and Indirect) — Flood damages will be prepared for each frequency storm event after the proposed project utilizing the damage spreadsheets. Indirect damages for each frequency storm event after the proposed project will also be determined. Expected annual damages will be calculated and a present worth determined. Project benefits will be calculated by subtracting the "Post -Project' direct and indirect damages from the existing direct and indirect damages calculated in the Problem Identification Phase. 2. Costs — The costs for the 50-year plan of improvements will be determined. All calculations, quantities, and unit costs will be documented and included in the technical appendix. The format of the cost estimate will be identical to that used in the alternatives feasibility analysis. ANdEBfoN CoAwh,%Nq ENf&mfiS, INC. Scope of Work for the Old Town Basin Selected Plan of Improvements Page 6 of 6 3. Benefit/Cost Ratio — The benefit/cost ratio will be computed based on only the projects that reduced damage to structures. All other costs will be listed by not included in the benefit/cost ratio. D. Documentation of the 50-Year Plan of Improvements A written description of the 50-year plan of improvements will be provided in a report including pertinent documentation associated with the hydrologic, hydraulic, and benefit/cost analyses. The report will be submitted separately from that of the Selected Plan Summary. ANdmsoN GbAwh%Nq ElvgiNEERS, INC.