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PSA - Long-Termed Control Plan Stantec Consulting Services
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PSA - Long-Termed Control Plan Stantec Consulting Services
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11/12/2024 3:56:44 PM
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11/12/2024 3:56:29 PM
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Board of Public Works
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Projects
Document Date
11/12/2024
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Stantec Consulting Services Inc. 11 of 16 <br />TO1 – Randolph-Sampson RTB PER <br /> <br />Subtask 4.1- Hydraulic Design <br />The hydraulic design analysis for the improvements will determine the following key design criteria: <br />• Flow diversion structure (overflow structure to RTB) hydraulic control approach and parameters. <br />• RTB influent and effluent conduits/junction chamber size and configuration. <br />• RTB storage size and flow/level control approach and parameters. <br />• Recommended CSO 022 regulator hydraulic modifications. <br />• Active monitoring and throttle control approach and setting to prevent overflows at CSO 48 <br />near River Crossing #1. It is assumed this will include an active gate control and require <br />connection to the City’s control system. <br />As part of this scope, STANTEC will also define key hydraulic design criteria for the regulators/throttles <br />upstream of the East Race at CSOs 014, 018, 021, 040. <br />STANTEC will evaluate the alternatives using the updated H&H model against the LTCP “Typical Year <br />Performance Criteria”, i.e., no more than 9 CSO Discharges during the typical year rainfall. Model <br />simulations will also be conducted for the alternatives with up to three (3) design storms (1-year, 5-year <br />and 10-year). The purpose of design storm simulation is to understand the hydraulic profiles in the <br />system and assess the risk of undesirable surcharge conditions. <br />Results of the hydraulic design analyses will be reviewed in a hydraulics workshop during which <br />computational fluid dynamics (CFD) modeling specialists will review and comment on proposed <br />hydraulic design criteria for the facilities at the Randolph Sampson site. Comments will be considered in
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