The main purpose of the Help Hoover Dam Act is to allow the Secretary of the Interior to spend money from the Colorado River Dam fund for various activities related to the Hoover Dam. This includes operations, maintenance, investigations, cleanup actions, and capital improvements. The goal is to ensure the continued functionality and safety of the Hoover Dam and the surrounding areas. Key provisions of the Act include the authorization for the Secretary of the Interior to use funds that have been recovered on a non-reimbursable basis.