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Rate Matters
12 Months Ended
Dec. 31, 2017
Rate Matters [Abstract]  
Rate Matters
8.
Rate Matters

From time to time, the Company files applications for rate increases with the PPUC and is granted rate relief as a result of such requests.  Most recently, the PPUC authorized an increase in rates effective February 28, 2014. The Company anticipates that it will file a rate increase request in 2018.

The PPUC permits water utilities to collect a distribution system improvement charge, or DSIC.  The DSIC allows the Company to add a charge to customers' bills for qualified replacement costs of certain infrastructure without submitting a rate filing.  This surcharge mechanism typically adjusts periodically based on additional qualified capital expenditures completed or anticipated in a future period.  The DSIC is capped at 5% of base rates, and is reset to zero when new base rates that reflect the costs of those additions become effective or when a utility's earnings exceed a regulatory benchmark.  The surcharge reset to zero when the new base rates took effect in February 28, 2014.  The Company's earnings are currently below the regulatory benchmark, allowing the Company to collect DSIC. The DSIC provided revenues of $899 in 2017, $0 in 2016, and $0 in 2015. The DSIC is subject to audit by the PPUC.