I am struggling with the best way to summarize data.

Here is an example of what I am trying to do. I manage several projects
where one project might affect multiple site locations. In addition, I might
have several projects occuring at one site. I am trying to better understand
and manage timelines at each site for all projects. Here is how the data is
feeding...

I have a raw data feed that contains in multiple rows, a name of a project,
site name where project is occuring, and a column for each construction
target dates/milestones for that project. I did a PIVOT to bring each site
name in the data rows and each project across in the data columns. I did
copy/paste special/values to a separate worksheet and from there I want to
insert (via a lookup function I assume) one of the specific construction
milestone dates that would correspond to both the site and the project. Just
doing a vlookup against the site wouldn't necessarily bring in the right
project and just doing a vlookup against the project wouldn't bring in the
right site. How/what would be the best way to be able to use both as a
reference? Is there a way?
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CJ