16 U.S.C. § 8412: Identifying opportunities for recreation

conduct an inventory and assessment of recreation resources for Federal recreational lands and waters; develop the inventory and assessment with support from public comment; and update the inventory and assessment as the Secretary concerned determines appropriate. any unique recreation values and recreation opportunities; and areas of concentrated recreational use; and type of recreation opportunity and type of natural or artificial recreation infrastructure; to the extent available, the level of use of the recreation resource as of the date of the inventory; and identifying, to the extent practicable, any trend relating to recreation opportunities or use at a recreation resource identified under subparagraph (A). the maintenance needs of, and expenses necessary to administer, the recreation resource; the suitability for developing, expanding, or enhancing the recreation resource; and the adequacy of the current management of the recreation resource. To the extent practicable, the Secretary concerned shall use or incorporate existing applicable research and planning decisions and processes in carrying out this section.