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Property, Plant and Equipment
 12 Months Ended
Sep. 30, 2017
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment
PROPERTY, PLANT AND EQUIPMENT
Property, plant and equipment comprise the following categories at September 30:
 
2017
 
2016
Distribution
$
2,835,339

 
$
2,634,191

Transmission
96,430

 
93,454

Construction in process
112,563

 
103,929

General and other
240,997

 
167,341

Total property, plant and equipment
$
3,285,329

 
$
2,998,915