Most states charge Differently zoned customers different rates. Businesses and pay less than residential. A PUC usually has reasons for that, but are they valid? If they are valid, are they still valid for a data center?
On the one hand I can understand residential rates being somewhat higher, they are still running service to your neighborhood, running a drop to your house, providing a meter and having to maintain that, but are selling a relatively small amount of electricity on that meter.
But a huge new consumer should not be paid for by raising residential rates. If their demand exceeds supply, that price should be paid by that consumer not all the other customers whose usage hasn't changed.