Some links I find useful include:

Kentucky State Data Center for demographic data from the United States Census for the Commonwealth of Kentucky;
FRED is an online economic data repository;
The Social Security Administration publishes Cost of Living Adjustments;
The current Prime Rate is available from
Treasury (US) Yield Curve Rates for various maturity series are listed at US Treasury Bonds; the Federal Reserve's Selected Daily Interest Rates for US Treasuries is also helpful in determining the cost of debt for utilities;
American Water Works Association (AWWA) publishes manuals for use by water professionals. AWWA Manual M1 is the foremost guide in utility rate making and cost of service studies;
Kentucky Revised Statutes authorize the formation of municipal utilities (KRS 96) and water districts and water associations (KRS 74) for the purpose of providing water (and sewer) service;
PSC-regulated utilities may access filing documents on PSC's website forms for electronic filingThe Uniform System of Accounting guidelines are also available;
Rainfall data for Kentucky stations is available at NOAA

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