You CAN Have It Both Ways: Building a Water Transmission Line and Pump Station to Meet Today's and Tomorrow's Customer Needs, Upper Trinity Regional Water District and CH2M Hill

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The Upper Trinity Regional Water District (UTRWD) currently provides treated water service on a wholesale basis to towns, cities and utility districts throughout Denton County and a portion of Collin County. UTRWD serves the majority of its members and customers directly through its Regional Treated Water System (RTWS). The RTWS is comprised of the Tom Taylor Water Treatment Plant, the Tom Harpool Water Treatment Plant, ground storage tanks, an elevated storage tank, pump stations and approximately 87 miles of large transmission pipelines. UTRWD’s members and customers subscribe for an amount of water which is delivered to them at their point(s) of delivery. UTRWD maintains sufficient capacity in its finished water system to deliver the subscribed capacity to its members and customers. In order to ensure a reliable system, UTRWD retained CH2M HILL to perform a hydraulic analysis for several demand scenarios for customers in the western portion of their system. The analysis, which reviewed flows ranging from 10-26 mgd, indicated that several pipeline diameter combinations ranging from 30-42 inch and two pump station options should be considered. Additionally, 2 pump station locations and 2 alignments were available for construction. This paper will discuss how running numerous hydraulic model scenarios revealed several possible pipe combinations for near and long term demands. It will also discuss how the inclusion of these combinations as bid alternates with multiple pipe materials encouraged competition and enabled UTRWD’s Board to select the most advantageous option.