Is this a good beach to dig for large cockle clams?

No

No, we don't have those type of clams here. You would be better off in a Puget Sound area park.

I don't think so. The water and grounds seem contaminated.

Bummer. I saw a guy on You Tube digging them up in Grays Harbor... any ideas on where he might have been? They were nice sized clams too... not the smaller ones.