Hi, fincent!
My name is Kate, and I’m a mapper on the OSM team at Lyft. In this changeset, some of the tags have been copied due to remodeling of the existing roads.  In our practice, we try to avoid removing earlier-added tags if they don't have an impact on routing. 
As far as I understand, the tag  ‘oc_1926_road_bond_issue' was added by another mapper in the previous changeset in 2010 - https://pewu.github.io/osm-history/#/way/86977618. Therefore, I’m unable to fully explain the rationale behind the addition of this tag.  
Regarding the ‘zHFCS' tag, it was misspelled, and it corresponds to the ‘HFCS’ tag. Thanks a lot for noticing this mistake, and I have already fixed it in the changeset - https://www.openstreetmap.org/changeset/137363101. Sorry for that and for any inconvenience these edits may have caused.  

Regards, Kate.