Timpanogos Cave
Environment Impact Statement

Author: U.S. Department of Interior
Publisher: U.S. Department of Interior, NPS, Rocky Mountain Region, August 1993.
Number of Pages: 164

From the Summary:

This plan was initiated to fulfill the legal requirements as mandated by section 604 of Public Law 95-625 and is in compliance with NPS management policies, applicable legislation, and executive requirements.

Yeah, in other words, this is really boring, old, and probably irrelevant.