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61 HOUSTON <br />engineering, inc. <br />Technical Memorandum <br />To: Rice Creek Watershed District Model User <br />From: Bret Zimmerman PE; Houston Engineering, Inc. <br />Through: Chris Otterness PE; Houston Engineering, Inc. <br />CC: Nick Tomczik; Rice Creek Watershed District Administrator <br />Subject: Rice Creek Watershed District — Hydrologic and Hydraulic Modeling Guidelines <br />Date: February 23, 2022 <br />BACKGROUND <br />The Rice Creek Watershed District (District) currently maintains hydrologic and hydraulic models for the <br />watershed through the District Wide Modeling Program (DWMP). These models and products were originally <br />completed in 2011. The initial model development methodology was presented in a 2011 report titled Hydraulic <br />and Hydrologic Modeling Report Rice Creek'. The original 15 models developed in various modeling software <br />including InfoSWMM, Autodesk Storm and Sanitary Analysis (ASSA), and HEC-RAS. <br />The District maintains and updates the models through the DWMP on an annual basis. The main purpose of the <br />annual updates is to incorporate projects that have been implemented within the watershed. Several other <br />updates have been made to the models including software conversions, combining smaller models, methodology <br />updates to conform to industry standards. There are currently a total of 11 hydrologic and hydraulic models that <br />are maintained as part of the DWMP. Table 1 shows the current modeling software and software version for the <br />Rice Creek Models. <br />Table 1: RCWD Models and Modeling Software <br />ACID 10-22-32 <br />ACID 31 <br />ACID 46 <br />ACD 15 JD 4 <br />ACID 25 <br />JD2 (HWC) <br />JD3 (CWC) <br />LRC (Merged) <br />RCD 2345 <br />URC (Direct Drainage) <br />HEC-RAS <br />XPSWMM <br />AutoDesk Storm and Sanitary Analysis <br />AutoDesk Storm and Sanitary Analysis <br />AutoDesk Storm and Sanitary Analysis <br />InfoSWMM <br />XPSWMM <br />XPSWMM <br />XPSWMM <br />XPSWMM <br />InfoSWMM <br />HEC-RAS <br />2018.1 <br />2020 <br />2020 <br />2020 <br />13.0 Service Pack 1 Update #2 <br />2018.1 <br />2018.1 <br />2018.1 <br />2018.1 <br />13.0 Service Pack 1 Update #2 <br />5.0.6 <br />' Hydraulic and Hydrologic Modeling Report— Rice Creek; Houston Engineering, Inc.; December 23, 2011 <br />PAGE 1 OF 2 <br />