Joel Ferry, the executive director of Utah's DNR retooled state laws to allow water right leasing and promoted HB187 which allows you to hold water rights without developing them.
He also happens to be a large shareholder in Bear River Canal Company and has been going around quietly buying up water rights from smaller canals and municipalities.
Grow The Flow is closely aligned with Great Salt Lake Rising (ran by the son of Mitt Romney), who plan to solve the issue ahead of the 2034 Olympics by buying up water rights from private owners. They committed $100 million of their own money, but got it matched with $300 million in state funds and a $1 billion budget line item from the Trump administration.
Be wary of environmentalism that is being driven by the wealthiest families in the state.