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2019-166C
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Last modified
11/19/2019 1:13:01 PM
Creation date
11/19/2019 1:10:44 PM
Metadata
Fields
Template:
Official Documents
Official Document Type
Work Order
Approved Date
10/08/2019
Control Number
2019-166C
Agenda Item Number
8.G.
Entity Name
Kimley-Horn and Associates, Inc.
Subject
Work Order 22
Water Distribution System Hydraulic model: Calibration, Evaluation, and Flushing Plan
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EXHIBIT #A <br />PROJECT UNDERSTANDING <br />In 2014, Indian River County Utilities (IRCU) authorized Kimley-Horn to perform the first phase <br />of developing a new water distribution system hydraulic model to reflect IRCU's current GIS <br />(Geographical Information System) data and better represent their existing water distribution <br />system configuration. As part of this work, Kimley-Horn developed a representative water <br />distribution model of IRCU's service area based on IRCU's GIS data at that time. The next <br />phase includes calibration and further development of the model for existing conditions. This <br />consists of: <br />• Collecting field pressure recordings and flow testing data using existing hydrants <br />• Hydraulic system calibration <br />• Developing and running extended period simulations with the remote storage tanks, <br />North Beach Repump, and the ground storage tanks at South Oslo <br />• Better defining existing operation of remote elevated storage tanks and high service <br />pumps (i.e. drain and fill versus keeping full) <br />• Evaluating the system's ability to achieve the PBS&J recommended ISO fire flow <br />requirements <br />• Providing recommendations for future storage tank operations and infrastructure <br />improvements. <br />• Identifying areas of low pressure and/or areas with potentially closed valves <br />• Defining residence times within the distribution system including at Total <br />Trihalomethanes (TTHMs) and Haloacetic acids five (HAAS) sites <br />• Identifying critical valves within the system <br />• Developing limited unidirectional flushing (UDF) maps to address pockets of poor water <br />quality <br />Consultant will update the model to account for infrastructure and operational changes that <br />have occurred since the model was developed in 2014, this consists of updating the model for <br />recent developments, water demands, infrastructure improvements and water plant operations. <br />Based on this understanding, the following tasks will be performed by the Consultant. <br />
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