1. Short title This Act may be cited as the National Park Service Legacy Act of 2017 . 2. National Park Service Legacy Restoration Fund (a) In general Chapter 1049 of title 54, United States Code, is amended by adding at the end the following: 104908. National Park Service Legacy Restoration Fund (a) In general There is established in the Treasury of the United States a fund, to be known as the National Park Service Legacy Restoration Fund (referred to in this section as the Fund ). (b) Deposits At the beginning of each applicable fiscal year, there shall be deposited in the Fund from mineral revenues due and payable to the United States that are not otherwise credited, covered, or deposited under Federal law— (1) $50,000,000 for each of fiscal years 2018, 2019, and 2020; (2) $150,000,000 for each of fiscal years 2021, 2022, and 2023; (3) $250,000,000 for each of fiscal years 2024, 2025, and 2026; and (4) $500,000,000 for each of fiscal years 2027 through 2047. (c) Availability of funds (1) In general Except as provided in paragraph (2), amounts deposited in the Fund shall be available to the Service for expenditure without further appropriation. (2) Unobligated amounts Any amounts not obligated by the date that is 2 years after the date on which the amounts are first available shall be credited to miscellaneous receipts of the Treasury. (d) Use of funds Amounts in the Fund shall be used for the high-priority deferred maintenance needs of the Service, as determined by the Director, as follows: (1) 80 percent of amounts in the Fund shall be allocated for projects that are not eligible for the funding described in subparagraph (A) or (B) of paragraph (2) for the repair and rehabilitation of assets, including— (A) historic structures, facilities, and other historic assets; (B) nonhistoric assets that relate directly to visitor— (i) access, including making facilities accessible to visitors with disabilities; (ii) health and safety; and (iii) recreation