Hello woodpeck,

"ref:borden" is in reference to the Borden System, a Canadian system of uniquely identifying archaeological sites. The first four letters reference a grid cell and the trailing numbers are specific to a certain site within that grid cell.

https://en.wikipedia.org/wiki/Borden_System

There is no public database source for archaeological sites in Canada. Instead, one can sometimes find the details on in-person signage, books, research papers, or land use planning documents.

Hope this helps! eerib