Congressional Budget Office Cost Estimate: S. 664, Navajo Utah Water Rights Settlement Act of 2018 [open pdf - 126KB]
From the Summary: "S. 664 would secure up to 81,500 acre-feet of water annually for the Navajo Nation by ratifying a settlement being negotiated between the United States, the state of Utah, and the Navajo Nation. The bill would authorize the appropriation of $209 million to capitalize the Navajo Utah Settlement Trust Fund, an interest-bearing fund established under the bill. After the parties meet certain conditions, the federal government would transfer ownership of the fund (including any earned interest that is appropriated to the fund) to the nation for constructing projects to deliver water to the reservation of the Navajo Nation in Utah. The bill also would direct the Bureau of Reclamation (BOR) to survey water use on the reservation. Using information from BOR, CBO [Congressional Budget Office] estimates that enacting those provisions would cost $242 million over the 2019-2023 period, assuming appropriation of the authorized and necessary amounts."
Congressional Budget Office: http://www.cbo.gov/