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Last modified
11/19/2019 1:13:01 PM
Creation date
11/19/2019 1:10:44 PM
Metadata
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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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SCOPE OF SERVICES <br />Task 1 — Update the Water System Hydraulic Model <br />Consultant will collect information provided by IRCU and other departments including, <br />but not limited to IRCU's GIS shape files for existing water meter billing data, existing <br />and future land uses, densities and development information, record drawings for <br />infrastructure improvements constructed since 2014, MOR data, SCADA data, areas <br />with potential water quality concerns, automatic flushing locations, Hydromax <br />information for valves and fire hydrants, and current population data. <br />Consultant will attend a kick-off meeting with IRCU staff to discuss and collect <br />information on the existing water system, consisting of current and proposed water <br />system improvements, new developments (pending or approved), areas of known low <br />system pressures, current water plant and pump station operations, new fire flow <br />requirements, and to define the approach to updating the water system model. <br />Consultant will update the model to add any improvements that have been added to the <br />system since the last model update in 2014. It is assumed that the County can provide <br />a list of all new projects constructed during that time frame. The model will also be <br />updated using the County's GIS data and available record drawings. The model will <br />only include pipes that are 6 -inch in diameter or larger. <br />Consultant will update the model to reflect any changes in operating parameters that <br />have been enacted since the 2014 model was developed. The Consultant will also add <br />the locations of automatic flushers in the distribution system. <br />The Consultant will review current MOR data and SCADA data to verify peaking factors <br />for peak hour flow and maximum daily flow that were estimated as part of the 2014 <br />model development. <br />• Using the LoadBuilder feature of WaterGEMS, the Consultant will update the demands <br />in the system with more recent water meter billing data. It is assumed that existing <br />customer meter data can be geocoded by the County for one years' worth of billing data. <br />The system demand will then be scaled to match the existing system demands for <br />maximum daily flow and peak hour flow scenarios to the MOR data. Loadbuilder will <br />also be used to assign a land use to each node in the model based on the GIS land use <br />map. Once both the land use data and billing data are updated in the model, the <br />information will be used to estimate potable water demands for different land uses. <br />Task 2 — Calibrate the Water System Hydraulic Model <br />Consultant will develop a calibration plan to test a portion of the hydraulically significant <br />transmission watermains in the Indian River County water distribution system. <br />Development of the calibration plan will require coordination with and support from IRCU <br />
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