Digest: The Act allows WRD to say yes to a temporary lease of existing water rights to become in-stream water rights, if WRD finds certain facts and conditions. The Act sunsets on Jan. 1, 2030. (Flesch Readability Score: 60.1). [Digest: The Act gives money to WRD for projects in the Walla Walla basin. (Flesch Readability Score: 76.5).] [Appropriates moneys from the General Fund to the Water Resources Department to implement projects that benefit water demands in the Walla Walla basin.] Authorizes the Water Resources Department to approve applications by certain water districts within the Walla Walla basin to lease existing water rights for temporary conversion to in-stream water rights if certain conditions exist and the department makes certain determinations. Establishes procedures for how applications may be considered and establishes the terms of leases that are created under the Act. Sunsets on January 2, 2030.