(AP) — Missouri Gov. Jay Nixon says diverting Missouri River water to Kansas would be “ill-advised.”

In a letter sent Thursday to Kansas Gov. Sam Brownback, Nixon says Kansas water officials should reconsider studying the feasibility of building a 360-mile aqueduct. Kansas officials envision diverting as much as 4 million acre feet of Missouri River water and sending it west to support irrigated farming of corn and other crops.

Plans to move forward with the aqueduct study were announced Tuesday. The talk comes amid concerns that the current use of the Ogallala Aquifer to support Kansas agriculture is unsustainable.

Nixon says the river is “the lifeblood of numerous Missouri communities.” He noted the river is used for drinking water and to ship goods to market.