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REGULATORY PROCEEDINGS (Tables)
 12 Months Ended
Dec. 31, 2017
REGULATORY PROCEEDINGS [Abstract]  
Eligible plant improvements
The following table summarizes (1) Artesian Water's applications with the DEPSC to collect DSIC rates and (2) the rates upon which eligible plant improvements  are based:

Application Date
 
11/26/2014
  
5/28/2015
  
11/24/2015
  
05/31/2016
  
11/29/2016
 
DEPSC Approval Date
 
12/16/2014
  
6/16/2015
  
12/15/2015
  
06/28/2016
  
12/20/2016
 
Effective Date
 
1/1/2015
  
7/1/2015
  
01/01/2016
  
07/01/2016
  
01/01/2017
 
Cumulative DSIC Rate
  
0.34
%
  
1.15
%
  
1.57
%
  
2.30
%
  
4.71
%
Eligible Plant Improvements – Cumulative Dollars (in millions)
 
$
1.3
  
$
4.6
  
$
7.0
  
$
10.3
  
$
16.6
 
Eligible Plant Improvements – Installed Beginning Date
 
10/1/2014
  
10/1/2014
  
10/01/2014
  
10/01/2014
  
10/01/2014
 
Eligible Plant Improvements – Installed Ending Date
 
10/31/2014
  
4/30/2015
  
10/31/2015
  
04/30/2016
  
12/20/16