Iowa Administrative Code

below: “FERC rules” means the rules and regulations of the Federal Energy Regulatory Commission under the Federal Power Act and Natural Gas Act as published in the CFR. “NARUC guidelines” means the guidelines published by the National Association of Regulatory Utility Commissione…

necessary for the administration thereof, shall be kept or made accessible within this state unless otherwise authorized by the commission, including: 18.2(1) The utility’s tariffs. 18.2(2) A record of the telephone number and business location of the utility’s administrative, te…

of a general corporate nature or otherwise pertain to the utility’s operations as a whole shall be made available for examination by the commission during normal business hours, unless otherwise authorized by the commission. Upon receipt by a utility of a formal request in writin…

18.4(1) Units of property. Rate-regulated electric utilities shall maintain an accounting system for Units of Property in Accounting for Additions and Retirements of Electric Plant in accordance with the “Uniform systems of accounts—electric rules” rule in 199—Chapter 16. 18.4(2)…

18.5(1) Units of property. Rural electric cooperatives (RECs) subject to rate regulation by the commission shall adopt the RUS rules contained in 7 CFR Part 1767 published May 27, 2008. The REC shall maintain sufficient records to support additions to plant, retirement units, and…

18.6(1) Units of property. Rate-regulated gas utilities shall maintain an accounting system for Units of Property in Accounting for Additions and Retirements of Gas Plant in accordance with the “Uniform systems of accounts—electric rules” rule in 199—Chapter 16. 18.6(2) Preservat…

18.7(1) Units of property. Rate-regulated water, sanitary sewage, and storm water drainage utilities shall maintain an accounting system for Units of Property in Accounting for Additions and Retirements of Water Plant in accordance with the “Uniform systems of accounts—electric r…

19.1(1) Purpose and application of rules. The rules shall apply to any rate-regulated gas utility operating within the state of Iowa as defined in Iowa Code chapter 476 and shall supersede any tariff on file with this commission that is in conflict with these rules. These rules a…

19.10(1) Procurement plan. Pursuant to Iowa Code section 476.6(11), the commission shall periodically conduct a contested case proceeding for the purpose of evaluating the reasonableness and prudence of a rate-regulated public utility’s natural gas procurement and contracting pra…

19.11(1) Purpose. This rule is intended to allow gas utility companies to offer, at their option, incentive or discount rates to their sales and transportation customers. 19.11(2) General criteria. a. Natural gas utility companies may offer discounts to individual customers, to s…

19.12(1) Purpose. This subrule requires gas distribution utility companies to transport natural gas owned by an end user on a nondiscriminatory basis, subject to the capacity limitations of the specific system. “System capacity” means the maximum flow of gas the relevant portion …

19.13(1) Definitions. The following words and terms, when used in this rule, shall have the meanings indicated below: “Large-volume user” means any end user whose usage exceeds 25,000 therms in any month or 100,000 therms in any consecutive 12-month period. “Small-volume user” me…

19.14(1) Applicability and purpose. This rule applies to each gas public utility, as defined in Iowa Code sections 476.1 and 476.1B, and is intended to implement Iowa Code section 476.66. 19.14(2) Notification. Each utility shall notify all customers of the customer contribution …

19.15(1) Applicability. All rate-regulated gas utility companies may maintain a reserve of contract services in excess of their maximum daily system demand requirement and recover the cost of the reserve from their customers through the PGA. 19.15(2) Definitions. The following de…

19.16(1) Notification. Utilities will notify the commission immediately, or as soon as practical, of any incident involving the release of gas, failure of equipment, or interruption of facility operations, which results in any of the following: a. Any reportable incidents as defi…

19.17(1) Eligible capital infrastructure investment. A rate-regulated natural gas utility may file for commission approval of a capital infrastructure investment automatic adjustment mechanism to allow recovery of certain costs from customers. To be eligible for recovery through …

19.2(1) Tariffs to be filed with the commission. The schedules of rates and rules of rate-regulated gas utilities shall be filed with the commission in accordance with this chapter. Tariff provisions will be definite and clear. Utilities that are not subject to the rate regulatio…

19.3(1) Disposition of gas. The meter and any service line pressure regulator shall be owned by the utility. The utility shall place a visible seal on all meters and service line regulators in customer use, such that the seal must be broken to gain entry. a. All gas sold by a uti…

19.4(1) Customer information. Each utility shall: a. Maintain up-to-date maps, plans or records of its entire transmission and distribution systems, with such other information as may be necessary to enable the utility to advise prospective customers, and others entitled to the i…

19.5(1) Requirement for good engineering practice. The gas plant of the utility shall be constructed, installed, maintained, and operated in accordance with accepted good engineering practice in the gas industry to ensure, as far as reasonably possible, continuity of service, uni…

19.6(1) Inspection and testing program. Each utility shall adopt a written program for the inspection and testing of its meters to determine the necessity for adjustment, replacement or repair. The frequency of inspection and methods of testing shall be based on the utility’s exp…

19.7(1) Purity. All gas supplied to customers shall be substantially free of impurities that may cause corrosion of mains or piping or from corrosive or harmful fumes when burned in a properly designed and adjusted burner. 19.7(2) Pressure limits. The maximum allowable operating …

19.8(1) Acceptable standards. As criteria of accepted good safety practice, the commission will use the applicable provisions of the standards incorporated by reference in subrule 19.5(2). 19.8(2) Protective measures. Utilities will exercise reasonable care to reduce hazards inhe…

19.9(1) PGA clause. Pursuant to Iowa Code section 476.6(11), PGAs shall be computed separately for each customer classification or grouping previously approved by the commission and will use the same unit of measure as the utility’s tariffed rates. PGAs shall be calculated using …

20.1(1) Authorization of rules. Iowa Code chapter 476 provides that the Iowa utilities commission shall establish all needful, just and reasonable rules, not inconsistent with law, to govern the exercise of its powers and duties, the practice and procedure before it, and to gover…

20.10(1) Coverage. Standards for ratemaking shall apply to all rate-regulated utilities in the state of Iowa. The commission may, by rule or by order in specific cases, exempt a utility or class of utilities from any or all ratemaking standards. The standards are recommended to a…

20.11(1) Pursuant to Iowa Code section 476.17, each investor-owned utility shall have a plan to notify its customers of an approaching peak demand on the day when peak demand is likely to occur. The plan shall be made available to the commission upon request. 20.11(2) The plan sh…

section 476.6(12), the commission shall periodically conduct a contested case proceeding for the purpose of evaluating the reasonableness and prudence of a rate-regulated public utility’s practices related to procurement of and contracting for fuel used in generating electricity.…

20.13(1) Purpose. This rule is intended to allow electric utility companies to offer, at their option, incentive or discount rates to their customers. 20.13(2) General criteria. a. Electric utility companies may offer discounts to individual customers, to selected groups of custo…

20.14(1) Applicability and purpose. This rule applies to each electric public utility, as defined in Iowa Code sections 476.1, 476.1A, and 476.1B. Pursuant to Iowa Code section 476.66, each utility shall maintain a program plan to assist the utility’s low-income customers with we…

20.15(1) Newly installed lighting. All newly installed public utility-owned exterior flood lighting shall be solid-state lighting or lighting with equivalent or better energy efficiency. 20.15(2) In-service lighting replacement schedule. In-service lighting shall be replaced with…

20.16(1) Applicability and purpose. This rule applies to all rate-regulated utilities providing electric service in Iowa. Under the Act, each electric utility is required to hold sufficient emission allowances to offset emissions at all affected and new units. The acquisition and…

20.17(1) Applicability. This rule is applicable to investor-owned electric utilities operating within the state of Iowa subject to Iowa Code chapter 476 and to the construction, operation, and maintenance of electric transmission lines by electric utilities as defined in subrule …

20.18(1) Notification. The notification requirements in this rule are for the timely collection of electric outage information that may be useful to emergency management agencies in providing for the welfare of individual Iowa citizens. Each electric utility shall notify the comm…

20.19(1) Transmission cost adjustment. Pursuant to Iowa Code section 476.6(8)“b,” public utilities may automatically adjust rates and charges to recover transmission-related costs incurred by or charged to the public utility consistent with a tariff or agreement that is subject t…

20.2(1) Location and retention of records. Unless otherwise specified by this chapter, all records required by these rules shall be kept and preserved in accordance with the applicable provisions of 199—Chapter 18. 20.2(2) Tariffs to be filed with the commission. The schedules of…

20.20(1) A commercial or public electric vehicle charging station is not a public utility under Iowa Code section 476.1 if the charging station receives all electric power from the electric utility in whose service area the charging station is located. If an electric vehicle char…

20.3(1) Disposition of electricity. The meter, any associated instrument transformers, and the wiring between the instrument transformers and the meters shall be owned by the utility. The utility shall place a visible seal on all meters in customer use, such that the seal must be…

20.4(1) Customer information. Each utility shall: a. Maintain up-to-date maps, plans, or records of its entire transmission and distribution systems, together with such other information as may be necessary to enable the utility to advise prospective customers, and others entitle…

20.5(1) Requirement for good engineering practice. The electric plant of the utility shall be constructed, installed, maintained, and operated in accordance with accepted good engineering practice in the electric industry to ensure, as far as reasonably possible, continuity of se…

20.6(1) Inspection and testing program. Each utility shall adopt a written program for the inspection and testing of its meters to determine the necessity for adjustment, replacement, or repair. The frequency of inspection and methods of testing shall be based on the utility’s ex…

20.7(1) Standard frequency. The standard frequency for alternating current distribution systems shall be 60 cycles per second. The frequency shall be maintained within limits that will permit the satisfactory operation of customer’s clocks connected to the system. 20.7(2) Voltage…

20.8(1) Protective measures. Each utility shall exercise reasonable care to reduce those hazards inherent in connection with its utility service and to which its employees, its customers, and the general public may be subjected and shall adopt and execute a safety program designe…

charge shall be an energy adjustment clause. 20.9(1) Applicability. A utility’s electric energy adjustment shall recover from consumers only those costs that: a. Are incurred in supplying energy; b. Are beyond direct control of management; c. Are subject to sudden important chang…

21.1(1) Purpose. These rules establish standards of service to the public by utilities providing water by piped distribution systems and utilities providing sanitary sewage or storm water drainage disposal by piped collection systems that are subject to the jurisdiction of the Io…

substantial part of a water system with a purchase price of $3 million or more from a non-rate-regulated entity described in Iowa Code section 476.1(3) will maintain separate books and records for the acquired system until the utility’s next general rate case unless otherwise ord…

21.11(1) Sanitary sewage disposal service. a. Metered measurement of sanitary sewage. All sanitary sewage disposal service sold by a utility shall be on the basis of metered measurement, except that the utility may at its option, pursuant to commission-approved tariffs, provide f…

21.12(1) Customer information. a. Each utility shall: (1) Post a notice in a conspicuous place in each office of the utility where applications for service are received, informing the public that copies of the rates and rules relating to the service of the utility are available f…

so long as the standards do not mandate a particular supplier. All connections to the utility-owned equipment or facilities are to be made by the utility at the applicant’s expense. At the time of attachment to the utility-owned equipment or facilities, the applicant will transfe…

measure the volume of sewage disposal, the separate meters will be tested in substantial conformity with the requirements of rule 199—21.6(476). [ARC 8846C, IAB 1/22/25, effective 2/26/25]