为满足合同规定的30 MGD弗吉尼亚海滩、加斯顿湖供水项目对摩尔桥水处理厂的用水需求，并提供可靠且一致的工厂出水水质，该水质将符合《安全饮用水法案》和弗吉尼亚州卫生部法规的现行规定，该市承担了一项耗资8200万美元的资本改造项目，以升级并扩建其摩尔桥水处理厂，使其达到108 MGD。该项目的一个关键要素是设计和安装综合分布式控制系统（DCS）/监控和数据采集（SCADA）系统。 该系统将监控摩尔桥工厂的设施和所有远程水系统设施。此外，DCS/SCADA系统将接收来自126个远程废水收集泵站和监控现场的信号。该项目的初始阶段包括现场调查，以确定需要监测和控制的设施的数量和位置，与城市工作人员进行讨论，以确定需求和愿望，并与过程和其他工程专业会面，以满足监测和控制要求。 然后编写了一份技术备忘录，其中讨论了各个现场，包括其位置、每个现场的仪器、仪器状况和控制系统建议。下一阶段涉及编制设计文件，以实施选定的建议。本文讨论了文件编制过程中考虑的各种选择。

To satisfy the contracted 30 MGD Virginia Beach, Lake Gaston Water Supply Project water demands on the Moores Bridges Water Treatment Plant and provide a reliable and consistent plant effluent water quality which will meet current provisions of the Safe Drinking Water Act and Virginia Department of Health regulations, the City undertook an $82,000,000 capital improvement project to upgrade and expand to 108 MGD its Moores Bridges Water Treatment Plant. A critical element of this project was the design and installation of a comprehensive distributed control system (DCS)/supervisory control and data acquisition (SCADA) system. This system will monitor and control the facilities at the Moores bridges plant and all remote water system facilities. In addition, the DCS/SCADA system will accept signals from 126 remote wastewater collection pumping station and monitoring sites. The intital phase of the project included field investigations to ascertain the number and locations of facilities to be monitored and controlled, discussions with City personnel to determine needs and desires, and meeting with process and other engineering disciplines for monitoring and control requirements. A technical memorandum was then prepared which discussed the various sites including their locations, instruments at each site, condition of the instruments and control system recommendations. The next phase involved the preparation of design documents to implement the selected recommendations. This paper presents a discussion of the various options considered in the preparation of the documents.