If that’s true it means Whiteface is prioritizing snowmaking over curtailment payments which is invite opposite of Gore. But the real questions are how much are operations disrupted and why participate at all if there is a high probability of significant disruption? Participants get a notification of a possible event the day before but only a 2 hour notice of an actual curtailment. I think there have been 4 day ahead notices but only one curtailment this week. How does Gore respond? Did they send their overworked people home all 4days? Do they call them in at 10pm or not at all? Also, NYISO requires only 4 hours of load reduction, not 6 as ORDA has said it will provide.
Considering how badly Gore has performed this year and how little time there is to build the Hole Shot course, ORDA should consider dropping out of the curtailment program or moving Hole Shot to LP or both.
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Curtailments are not something you opt in and out of. The utility company in any given area has to supply power to a wide variety of customers in a wide variety of demand scenarios. Demand is at its highest in the evenings before very cold nights. They can't overload the grid, or there will be outages. So they will ask (or require) large commercial customers to reduce their load during that specific time period to avoid outages. There can be varying degrees, or varying times. Sometimes, there will be the option to "buy through" the curtailment. That is, operations continue as normal, but electric rates during that time are 3-4x higher. Sometimes it is mandatory, and there is no option to buy through. This isn't a change from the past, but there were hardly any very cold nights the last 2 years, so it wasn't something they had to deal with.
Regarding the timeframe, I believe they are notified of a possible curtailment ahead of time and given a timeframe. That was where the 6 hours (4pm to 10pm) came from, where there was the possibility of the lifts closing early. Then, closer to the time, they are given more specifics. I'm sure the utility company has very detailed data on power supply and demand, and knows when and to what degree the grid could become stressed. The lifts actually never closed early, and I think there was only one evening where the snowmaking was shut down, from 6pm to 10pm. Power demand is always at its lowest in the overnight hours, so snowmaking can come back after 10pm, but draining and charging lines in these temps can be risky and lead to freezing, especially with a shorthanded and inexperienced crew.
Whiteface was subject to the same thing as Gore, and there was also I think one night where snowmaking was shut down. They opted to only work on the lower mountain when there was a possibility of a curtailment to avoid having to drain and charge their multiple booster stations. I think this yielded the most water actually turned into snow, and the best long-term results (base building for spring on critical routes), but in the short term, many, myself included, would like them to finish their remaining snowmaking trails.