Perteet Inc 2/1/2018 - Laserfiche WebLink

EVERETT STATION PARK-AND-RIDE EXPANSION Agreement with Perteet Inc. January 2018 4.5 Water Quality Treatment Calculations Consultant will prepare sizing calculations for the proposed water quality treatment facilities. Assumptions: • The hydrologic analysis conducted as part of this work element will be done using MGS FloodTM,a continuous simulation modeling software accepted by the Washington State Department of Ecology. Deliverables: • Water Quality Treatment calculations(to be included in the Drainage Report) 4.6 Flow Control Calculations Consultant will prepare sizing calculations for flow control(detention or infiltration)facilities. Assumptions: • The hydrologic analysis conducted as part of this work element will be done using MGS FloodTM' a continuous simulation modeling software accepted by the Washington State Department of Ecology. Deliverables: • Flow Control Calculations(to be included in the Drainage Report) 4.7 Pipe Conveyance Calculations Consultant will prepare storm pipe conveyance capacity calculations for pipe segments associated with the project site: • 60%PS&E:Prepare preliminary pipe sizing calculations, using full-flow conditions with the Manning equation and SBUH Method. • 90%PS&E:Update conveyance calculations for the Drainage Report. Deliverables: • Conveyance Calculations(to be included in Drainage Report) 4.8 Drainage Report Consultant will assemble a draft(60%)and final Drainage Report.The drainage report will include a written assessment and summary of the surface water design features on the project,summary of tables,flow control and water quality treatment calculations,pipe capacity calculations,drainage basin maps,backwater analysis (Hydraulic Grade Line),and supporting exhibits. This subtask will also include independent QA/QC reviews of the full drainage report for each submittal(60% and Final).QA/QC reviews will be conducted by senior staff. Deliverables: 8 File location: X:\Everett,City of\Promo Efforts\20170146-Everett Station P&R Expansion\Promo\Business Development\Scope\Everett Transit Parking Lot_Sc ope_2018-1-10.d ocx