S. Rept. 115-250: Reliable Investment in Vital Energy Reauthorization Act, Report to Accompany S. 1336, Including Cost Estimate of the Congressional Budget Office, May 21, 2018 [open pdf - 225KB]
"The purpose of S. 1336 is to reauthorize hydroelectric production incentives and hydroelectric efficiency improvement incentives, and for other purposes."
S. Rept. 115-250; Senate Report 115-250
Government Publishing Office: http://www.gpo.gov/