"Native American encampment on landfill, circa 1900, south of South Royal Brougham Way and east of First Avenue South." Source: crosscut.com
At the ASBC talk last night it was clear that major industrial development can still leave substantial and highly significant archaeological materials interspersed even within the boundaries of heavy impact – in this case within a few dozen metres of a major hydroelectric dam. This reminded me of a recent story I read about downtown Seattle archaeology. Due mainly to concerns about what would happen in even a moderate earthquake comparable to the Nisqually event of 2001, Seattle is planning to replace the Alaska Way viaduct – that multi-level highway which blocks the city from its own waterfront. You can watch a video of a simulation of the collapse of the viaduct here – I am sure most Seattlers would like to be done with that uncivic monstrosity, but not, perhaps, so suddenly. Ironically, the ASBC talk on Ruskin Dam was also a seismic upgrade project.
Anyway, the current plan in Seattle is to put a cut-and-cover tunnel in its place – similar to some of the tunnels recently built in Vancouver’s new Canada Line LRT. Crosscut.com’s Archaeology-savvy reporter “Mossback” (Knute Berger) has two excellent articles on the problems likely to arise when you dig such a large ditch through dense pre-contact and historic archaeology. The first article ran on May 11th, with the followup article on May 12th. If you are truly dedicated, there is a 200 page overview (6 meg PDF) of cultural resource management for the project, though it largely focuses on historic buildings and it relatively vague.
Northwest Coast Archaeology 