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11.7. Miles of Line and Interruptions <br />Analyzing interruptions by miles of line can help utilities explore the relationship <br />between outages, distribution line exposure, and customer density. This analysis <br />separates utilities into groups of similar average customer density (customers served <br />per mile). As shown in Table 16, utilities that use the eReliability Tracker were split into <br />five customer density groups of approximately 46 utilities each. Note that customer <br />density classes include utilities that either provided their miles of line data in the 2022 <br />eReliability Tracker data verification survey or recorded their data in the eReliability <br />Tracker. You can use the miles of line -related metrics shown in Table 15 and Table 16 as <br />an additional benchmark for your utility's reliability along with the customer <br />normalized -metrics included in the rest of the report. These metrics can be helpful in <br />understanding, for example, utility reliability against weather and animal -related <br />outages relative to similarly dense and exposed utilities. <br />Your utility's total miles of line: 595.68 <br />Your utility's overhead miles of line: 244.84 <br />Your utility's underground miles of line: 350.84 <br />Table 15. Total miles of line and interruptions <br />Customers <br />Interruptions <br />Minutes of <br />Interrupted per Mile <br />per Mile <br />Interruption per Mile <br />3.25 <br />0.08 <br />9.59 <br />Your utility <br />Utilities that use the <br />eReliability Tracker <br />31.29 <br />0.5 <br />126 <br />Utilities in vour region <br />19.11 <br />0.341 <br />256.52 <br />Your utility's customer density (customers per mile): 22.23 <br />Your utility belongs to customer density class <br />Table 16. Miles of line -related metrics by customer density class <br />Customer Density Customer <br />AverageAverage <br />Customers <br />Average Minutes <br />Class (Customers Density <br />Interruptions <br />Interrupted per <br />of Interruption <br />per Mile) Range <br />per Mile <br />Mile <br />per Mile <br />Class 1 0.0 - 20.85 <br />18.25 0.29 <br />60.47 <br />Class 2 20.85 <br />35.27 <br />21.74 <br />0.38 <br />89.12 <br />_ <br />Class 3 35.27 <br />46.79 <br />25.28 <br />0.42 <br />267.1 <br />Class 4 46.79 <br />38.43 <br />0.62 114.39 <br />63.41 <br />j 0.77 83.08 <br />Class 5 63.41 - <br />54.95 <br />917.68 <br />14 <br />196 <br />