65B - PROPOSED WATER AND SEWER RATE ADJ

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134 WATER RATE STUDY I City of Santa Ana, CA GIS Improvement Opportunities Based on a high -level review of the City's GIS database for water and sewer facilities, several opportunities for possible improvement were noted. Suggested changes fall into several categories to identify and specify: • Database design changes to improve storage, tracking and analysis capabilities; especially for time - dependent data such as inspections or maintenance activities. • Data attribution cleanup processes to provide unique ID fields, improve data integrity, and extend data analysis capabilities. • Business work process changes that could acquire missing or conflicting data attribution. • Additional source data to better support the Asset Management system; especially on the risk and replacement prioritization analysis. • Integration with hydraulic modeling. The above consulting tasks could likely be done for about $20,000 — 40,000;however, actually making these changes to the database (especially acquiring missing data) will take more effort based on the selected approach, the level of implementation and who is to make the changes. An additional $100,000 would be an appropriate estimate for the level of effort. Planning Recommendations A Water Distribution System Master Plan is recommended to • Develop an initial assessment program to refine prioritization, • Complete computer hydraulic modeling for (a) identifying capacity -based recommendations and (b) improving consequence of failure scoring in the prioritization, and • Compile a more complete capital improvements program containing specific projects and more precise planning level cost - estimates. Assessment Recommendations • A more detailed engineering review of maps, as -built drawings, and discussions with staff regarding the high risk pipes will enable development of a targeted assessment plan. Inspection and assessment techniques can vary depending on the material and location in particular, but also based on other relevant factors. • As a preliminary measure, assessment of all high risk pipe is recommended as soon as possible, followed by subsequent assessments to obtain better characteristic information on a system- wide basis. The subsequent assessments would be identified and planned as part of the water system master planning process, to align results with the overall master plan. • Costs associated with assessment can vary significantly depending on the techniques selected and the testing environment. Recent programs have involved inspection and engineering costs ranging from $100,000 to $200,000 per mile. Based on these ranges, costs were assumed to be $150,000 per mile. This allows for a broad range of testing technologies as well as engineering 65B -146 NOVEMBER 2014