Reliability

The City of Shasta Lake practices cost-effective management and consistent implementation of reliability investments and initiatives critical to maintaining and/or improving customer satisfaction and system reliability. The City strives to choose the most cost effective discretionary projects/practices with the greatest benefit to cost ratio to improve reliability.

Reliability Projects and Practices:

• Aggressive tree trimming to minimize tree related outages
• Installed New SCADA Master w/ alarm notification
• Mitigate recurring outages by employing such things as squirrel transformer bushing cover-ups
• Advanced Meter Infrastructures so we are notified of an outage as soon as possible
• Fusing Distribution tap lines so the protection zones are more localized
• Install additional line reclosing devices to keep the most customers on when we have an event
• Implemented a new mobile electronic inspection program to track and triage issues in the electric distribution system.
• Implemented minimally invasive pole testing program using the IML resistance drill needle system.  Allows for immediate analysis to evaluate pole stability and remaining strength to forecast critical failures or amount of cavity decay early.
• Upgraded critical connections to reliable wedge connectors (Boltless Connectors).
• Bought and implemented a new fault location mapping program, which enables the Utility to dispatch crews to a more pinpointed area when electrical issues arise.

Shasta Lake Reliability Indices:

TABLE TERMS

• SAIDI - This term represents the average number of outage minutes (due to sustained outages) per customer served.
• SAIFI - This term represents the average number of interruptions (due to sustained outages) per customer served.
• CAIDI - This term gives the average outage duration that any given customer would experience (restoration time).
• ASAI - This term is the ratio of the total number of customer hours that service was available to the number of hours in a year.