Found this link elsewhere on the web tonight:
ftp://ftp.modot.mo.gov/St.%20Louis/Poplar%20Street%20Bridge/PSB%20AJR/PSB%20Interchange%20Draft%20AJR%20July%202012%20appendices%20compressed.pdf (http://ftp://ftp.modot.mo.gov/St.%20Louis/Poplar%20Street%20Bridge/PSB%20AJR/PSB%20Interchange%20Draft%20AJR%20July%202012%20appendices%20compressed.pdf)
(Side note: In case there is concern from the moderators about accessing MoDOT's ftp site, MoDOT has given the address of their ftp site before in news releases such as this one: http://www.modot.gov/northeast/newsandinformation/District3News.shtml?action=displaySSI&newsId=46599 (http://www.modot.gov/northeast/newsandinformation/District3News.shtml?action=displaySSI&newsId=46599))
Highlights from what I have read so far:
* Page 3/466: The last sentence on the left side column seems oddly worded; it seems MoDOT is saying I-170 would get extended southward before the missing movements would be added at the PSB interchange.
* Page 10/466: Good map of alignments for the new ramps.