PURPOSE: This rule streamlines provisions from rules formerly in Chapter 3.

1. (1) Each gas utility subject to the commission’s jurisdiction shall submit a depreciation study, database, and property unit catalog to the manager of the commission’s engineering analysis unit and to the Office of the Public Counsel, as required by the terms of subsection (l)(B).

   1. (A) The depreciation study, database, and property unit catalog shall be compiled as follows:

      1. 1. The study shall reflect the average life and remaining

life of each primary plant account or subaccount;

1. 2. The database shall consist of dollar amounts, by plant

account or subaccount, representing—

1. A. Annual dollar additions and dollar retirements by

vintage year and year retired, beginning with the earliest year of available data;

1. B. Reserve for depreciation;
2. C. Surviving plant balance as of the study date; and
3. D. Estimated date of final retirement and surviving

dollar investment for each warehouse, propane/air production facility, liquefied natural gas facility, underground natural gas storage facility, general office building, or other large structure; and

1. 3. The property unit catalog shall contain a description of

each retirement unit used by the utility.

1. (B) A gas utility shall submit its depreciation study, database, and property unit catalog on the following occasions:

   1. 1. Upon the date five (5) years from the last time the

commission’s staff received a depreciation study, database, and property unit catalog from the utility; and

1. 2. Upon submission of a general rate increase request.

However, a gas utility need not submit a depreciation study, database, or property unit catalog to the extent that the commission’s staff received these items from the utility during the three (3) years prior to the utility’s filing for a general rate increase request.

AUTHORITY: section 386.250, RSMo 2016.* This rule originally filed as 4 CSR 240-40.090. Original rule filed Nov. 28, 2018, effective July 30, 2019. Moved to 20 CSR 4240-40.090, effective Aug. 28, 2019. *Original authority: 386.250, RSMo 1939, amended 1963, 1967, 1977, 1980, 1987, 1988, 1991, 1993, 1995, 1996.