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City of Santa Ana, CAI WATER RATE STUDY <br />Number of Breaks per Year per 100 Miles of Total Installed Pipe <br />The City's water distribution system is a dynamic, evolving network. Pipes have been installed and /or <br />replaced for the past century. However, the City only has break records since 1990. To understand the <br />system -wide break history the following graph was generated (see Figure B - 19). It indicates the annual <br />breaks per 100 miles of actual installed pipe as of that year. Overall the City's average annual water <br />main break rate (since 1990) is 2.64 per 100 miles per year. This compares to a national average of 12 -14 <br />breaks per 100 miles per year. <br />The anomaly spike in the graph for 2010 is because the City's GIS database indicates that no mains were <br />installed that year even though there were 47 breaks listed for 2010. <br />Figure B -19: Number of Breaks per Year per 100 Miles of Installed Pipe <br />Figure B - 20 provides a map depicting the location of breaks color coded by break year since 1990. <br />BLACK & VEATCH ' Aonend'a: R_ VVat =_r CIP PnonYizafior Process <br />65B -113 <br />