If you are searching the internet for a free PDF of ASCE 113-15, you need to be aware of the following:
ASCE standards are copyrighted. Free downloads from unauthorized websites (e.g., PDF repositories, academia.edu without permission, or "free PDF" search results) are almost certainly pirated copies and may be outdated, incomplete, or corrupted.
Having ASCE 113 plus these four documents gives you a near-complete substation design library.