Congressional Budget Office Cost Estimate: S. 346: National Volcano Early Warning and Monitoring System Act [open pdf - 70KB]
"S. [Senate Bill] 346 would authorize the appropriation of such sums as are necessary for the U.S. Geological Survey (USGS) to establish a system to improve monitoring of active volcanoes. The bill also would authorize USGS to enter into cooperative partnerships with universities and state agencies to implement the system. Based on an analysis of information provided by USGS and assuming appropriation of the necessary amounts, CBO [Congressional Budget Office] estimates that implementing S. 346 would cost $55 million over the 2018-2022 period."
Congressional Budget Office: http://www.cbo.gov/