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City of Everett Edgewater Creek Bridge Replacement <br /> (1)water quality facility. This information will be used during the preliminary bridge <br /> Type, Size and Location analysis. Only one of the concepts developed by the bridge <br /> designer will be studied from a drainage standpoint. This concept will be mutually <br /> agreed upon by the bridge and stormwater designer. <br /> • Once a concept has been selected for final design the stormwater flow control and water <br /> quality treatment calculations will be updated as necessary. <br /> Deliverables: <br /> • Preliminary flow control and water quality treatment calculations(to be used for showing <br /> Type, Size and Location of the proposed flow control and water quality treatment <br /> facilities in support of the preliminary bridge design alternatives analysis. <br /> • Final flow control and water quality treatment calculations(to be included in the <br /> Drainage Report). <br /> 11.1.6 Pipe Conveyance Calculations <br /> Consultant will prepare storm pipe conveyance capacity calculations for new pipe segments <br /> associated with the project site: <br /> • Design Development(60%): Prepare preliminary pipe sizing calculations, using full-flow <br /> conditions with the Manning equation and the Rational Method. <br /> • Final design: Finalize pipe sizing calculations <br /> • Gutter flow and sag analysis: Prepare gutter flow and sag analysis (if low point is within <br /> project limits)to make sure the flow spread is contained with the roadway shoulders. <br /> Assumptions: <br /> • No new outfalls will be needed. The new conveyance system will tie into existing storm <br /> drain systems that already lead to existing outfalls. It is further assumed that these <br /> existing outfall systems have the capacity to accommodate project flows. <br /> Deliverables: <br /> • Conveyance Calculations (to be included in the Drainage Report) <br /> • Gutter flow analysis (to be included in the Drainage Report) <br /> 11.1.7 Drainage Report <br /> Consultant will assemble a draft drainage report(60%design phase)and final drainage report <br /> (90%design phase). The drainage report will include a written assessment and summary of the <br /> surface water design features on the project, summary of tables, flow control and water quality <br /> treatment calculations,pipe capacity calculations,drainage basin maps, backwater analysis <br /> (Hydraulic Grade Line), and supporting exhibits. <br /> Deliverables: <br /> • Draft Drainage Report at 60%PS&E phase (two [2] comb bound hard copies and one [1] <br /> electronic PDF copy) <br /> • Final Drainage Report at 90%PS&E phase(two [2] comb bound hard copies one [1] <br /> electronic PDF copy) <br /> Page 33 of 42 <br />