Professional Services Agreement - Lawson Fisher Assoc. - Corby Street Storm Sewer Evaluation

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APPENDIX 2 SCOPE OF WORK Scope of Work: PROCURE AND REVIEW EXISTING INFORMATION LFA will obtain and review available information such as planning studies, maps, design criteria, and drawings for the existing storm water facilities and combined sewers within the project area. It is assumed for this proposal that the City will supply all available information such as -built drawings, GIS data, previous studies, geotechnical reports, and existing survey data to LFA. The City will also provide information on their redevelopment plans within the study area to determine future land use. 2. FIELD INVESTIGATION AND SURVEY The as -built drawings and GIS data, to be provided by the City, will be used for the study. However, it is assumed for this proposal that some field verification and survey to verify critical elevations will be required. One day of field investigations has been included in our proposal. Manhole inspections will be performed at the structures where meters are to be installed and where additional information or verification of existing data is necessary to evaluate the existing system and recommended alternative. Our proposal does not include obtaining a geotechnical evaluation in the study area LFA will use existing information, if available, for this preliminary engineering study. 3. METERING OF CORBY STREET SEWER LFA will install and monitor at least two (2) area/velocity flow meters at strategic points within the Corby Street storm sewer to evaluate the flows during wet -weather events. It would be desirable to capture at least three (3) major rain events (112" or larger) to be used for the calibration and verification of the hydrologic/hydraulic model. The amount of time required for the metering will be dependent on the weather following the installation of the meters. For purposes of this proposal, twenty-four (24) weeks of flow metering are included. 4. DETAILED HYDROLOGIC/HYDRAULIC MODELING A hydrologic/hydraulic model of the Corby Street storm sewer will be developed using XP-SWMM. The model will be utilized to determine flow rates at various points along Corby Street taking into account the impact of the University of Notre Dame (University) retention basin contributions. The Rational Method will be used to determine peak discharge from all other areas within the study limits. Appendix 2, Scope of Work EJCDC E-520 Short Form of Agreement Between Owner and Engineer for Professional Services. Copyright ©2009 National Society of Professional Engineers for EJCDC. All rights reserved. Page 1