RBF CONSULTING 3 - 2013 - Laserfiche WebLink

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2. Field reconnaissance photo log 3. Documentation of County downstream water surface elevations Task 1.2 Identification of Existing Initial Needs Assessment RBF will prepare a qualitative assessment of the drainage constraints and conditions based upon existing data of the watershed and historical flooding problems for this area. Existing conditions and current design criteria will be evaluated to formulate initial assessment of the drainage needs. RBF will identify and summarize critical drainage related problems, including existing flood hazard zones and published floodplain and will identify existing physical or regulatory constraints based upon the baseline information researched for the watershed. Deliverables: 1. Need Assessment Memo Task 1.3 Establish Engineering Design Criteria RBF will provide preliminary engineering services to establish the design criteria for hydraulic and hydrologic design requirements prior to initiating the preliminary design process. The necessary planning criteria and standards will be established to ensure that the required level of flood protection is provided to meet the various jurisdictional agency requirements, and are in conformance with the City's criteria. This work item will include establishment of the following critical design features: ■ Hydraulic controls ■ Street inlet requirements • Outlet requirements ■ Local drainage system hydraulic modeling ■ Review of master plan design assumptions ■ Distribution of flows to the proposed storm drain and street section • Critical design water surfaces (committed elevations) ■ Allowable street flooding and storage ■ Deficiency upgrade requirements • Allowable design deviations (i.e., min. Flood protection levels) A memo summarizing the recommended design criteria and guidelines will be prepared for review. This document will serve as a reference framework to base decisions as work progresses and unique opportunities are encountered. Deliverables: 1. Design Critieria Memo Task 1.4 Field Facility Inventory RBF will perform an "above -ground" field review and inspection of the main existing storm drain facilities. This inventory will include the facilities that have been constructed since the previous storm drain masterplan (1994) and GIS mapping and the existing facilities on the index map. The investigation will provide verification of the facility information in comparison to the plan data, and augment data gaps where possible. The inspection will include limited field measurements, if possible, for depth of pipe, pipe size, and pipe condition (if visible). Field inventory information will be recorded and provided to the City for inclusion into the City database. Task excludes field survey of existing facilities constructed since 1994. Deliverables: 1. GIS database updated with new storm drain data (completed since 1994) 22