Interpretting phastConsElements from USCS Table Browser

I am trying to understand the information present in PhastCons elements bed files from USCS Table Browser. Following the information I found here I managed to get a description of the column names, but not a description of what they are measuring. I checked other BioStars posts, and apparently, the PhastCons have scores that range from 0-100, but this is not true according to the description from Table Browser (see below):

I also checked the distribution of the the “score” column, and on the file that is available to download, the smallest score is 117. So I am assuming the phastConsElements46wayPrimates bed file only contains the conserved regions. Is this correct? Also, where can I get a description of what the LOD score is measuring here.