The Truckee Carson Irrigation District and four of its Fallon employees were indicted Wednesday on 10 charges of conspiring to defraud the federal government, making false claims and falsifying records in a scam to secure Sierra water and gain credits from the federal government.

David Overvold, 58, project manager for the irrigation district based in Fallon; Lyman McConnell, 64, the district’s lawyer; Shelby Cecil, 65; and John Baker, 63, manipulated or disabled water meters, changed numbers on water-use reports and submitted inflated figures from 2000 to 2005 in order to secure additional water credits from the U.S. Bureau of Reclamation, the indictment said.

The four men and the district are scheduled to be arraigned Tuesday in U.S. District Court in Reno. If convicted, they could face up to 20 years in prison for each of the three falsification of records counts and five years for the conspiracy to defraud and each of the three false claims and false statement counts.

They also face a possible $250,000 fine for each of 10 counts.