Wis. Admin. Code Public Service Commission PSC 134.20
A utility shall preserve the following records in a readable format and keep them available for inspection by the commission for the periods indicated. The list is not a complete list of all types of utility records.
Description of Record | Period to be Retained | |
(1) | Maps showing the location and physical characteristics of existing plant | Currently |
(2) | Engineering records in connection with construction projects | Permanently |
(3) | Supply records: | |
(a) | Station and system supply records | Permanently |
(b) | All other records taken in the plant | 6 years |
(4) | Operating records: | |
(a) | Load dispatcher data | 6 years |
(b) | Interruption records | 6 years |
(c) | Meter test records | Until the information in the meter test record is entered in the meter history record and the meter is tested again* |
(d) | Meter history records | Life of meter plus 6 years |
(e) | Annual meter accuracy summary | 6 years |
(f) | Heating value records | 6 years |
(g) | Pressure records | 6 years |
(h) | Specific gravity records | 6 years |
(i) | All other records of operation | 6 years |
(5) | Equipment record: | |
Must be placed in mortality | Life of | |
study before destroying | equipment | |
(6) | Customers' records: | |
(a) | Inspection of customers' equipment | 10 years |
(b) | Complaint record | 6 years after the complaint is resolved |
(c) | Meter reading records used for billing | 6 years |
(d) | Billing record | 6 years |
(e) | Customer deposits | 6 years after refund |
(7) | Filed rates and rules | Permanently |
Note: See Federal Power Commission Orders 54 and 156 for preservation of records. Public Service Commission's Classification of Accounts, and s. 18.01, Stats.
Note: *Note that if meter test records are being used as meter history records under PSC 134.19(1) (c), the meter test records must be preserved for the time period required for meter history records.
Wis. Admin. Code Public Service Commission PSC 134.20
See also Investigation to Consider Proposed Changes to Records Retention Requirements for Electric, Gas and Water Utilities adopted by the commission in docket 5-US-114, December 12, 2006, as amended March 19, 2009, for a more comprehensive listing of retention periods of specific records.