Water System Assessment & Rate Study
Water System Assessment - In Progress
Water and sewer payments made by Village of Lisle water customers serve to sustain the operation and maintenance of the water distribution system. To understand more about the condition of the water distribution system, and collect comprehensive data on system components, the Village has engaged an engineering consultant, Baxter and Woodman, to complete a water system needs assessment and water rate analysis.
Background information on the Water System Needs Assessment & Water Rate Analysis.
March 2, 2020 Preliminary Water Assessment Presentation
A water system needs assessment consists of an evaluation of the age and condition of water towers, water treatment equipment, water mains, and other system components in an effort to determine the future needs of the system. Information gathered during this process is then used to develop a plan for future capital investment.
Develop System InventoryThe first step in the Village’s Water System Assessment is to review the Village’s water system inventory. Conducting the inventory process includes data gathering as well as a visual site inspection of pumping stations and storage tanks. Critical information on the water distribution system such as size, pipe type, and age is included.
Analyze Water System ConditionsNext, the consultant will engage in a conditions analysis to gain an understanding of the condition of the 121 miles of water main, the pumping station, the four above ground water storage facilities and other system components. Once the current conditions are established, the consultant will prepare recommendations based on best management practices for maintaining water systems which will recommendation regarding ongoing maintenance, rehabilitation or replacement of system components. This step includes gathering input from Village staff on areas with less than adequate pressure or fire flow, evaluation of main break history, and assessment of water quality.
Evaluate Main Break HistoryThe consultant will then create a Water Main Replacement ranking system by utilizing recent main break and service leak records. In addition, the consultant will look at trends of main breaks, pipe age and soil condition. Using the data gathered from these trends they will develop a priority recommendation for distribution system improvements. Any underground improvements will be carefully aligned with the Village's road resurfacing program in order to make sure that road resurfacing does not occur prior to water main rehabilitation.
Assess Water System OperationsDuring this step, the consultant will work with Village Water System Operators to discuss operation procedures and identify any process improvements that could lead to energy savings while continuing to maintain provide high levels of service.
Develop RecommendationsOnce the areas of highest needs have been prioritized, solutions to address those needs will be developed into specific recommendations and a preliminary capital improvement plan will be presented to the Village Board for public discussion and input.
Water Rate Study
Once a capital investment plan is developed for the system, revenues are analyzed and recommendations are made for the development of a sustainable financing model that will enable the capital investment plan to be carried out. This work is referred to as conducting a water rate analysis where current water rates, costs of provisioning water, anticipated increases in the cost of wholesale water (from DuPage Water Commission and the City of Chicago), and the revenues generated from the water system operation are taken into account in addition to consumer trends, neighboring water rates, and other factors.
Prepare Cost of Service
The first step in a rate analysis is to understand the current financial position of the Water Fund. The consultant will create a financial model and observe patterns and trends from previous years such as water consumption, water purchasing, capital expenses and fixed operating costs.
Determine Costs by User Type
During this step, the consultant will evaluate the existing water rate structure and the ability of the structure to finance needed future improvements to the system. The evaluation includes a review of the application of the water rate structure across all water customers.
Evaluate Infrastructure Replacement Costs
The recommended projects from the Water System Needs Assessment will be used to develop and prioritize capital investments for the Village. The consultant will work with the Village to develop a capital plan and financing structure to balance the needs of the system with the rates charged to residents.
Recommend Rate Structure
During this step the consultant will prepare a water rate scenario evaluation where various rate structures are presented that will finance operational and capital needs into the future. These rate structures will be presented to the Village Board for discussion and feedback prior to any implementation.
Develop Implementation Strategy
Depending upon the outcome of the rate analysis, the Village will prepare information that will be shared to the community giving an overview of the water system and rate analysis, and ultimately any decisions that will develop from this process.