I've done the archive search and come up with these State Parks/Public areas that have places to pump sand shrimp.

Tolmie State Park
Burfoot County Park, near Steamboat Island
Howarth Park just north of Mukilteo
Siletz Bay, Oregon
Netarts Bay, Oregon
Waldport Bay, Oregon
Yaquina Bay, Oregon
Any other areas in Washington or Oregon with public access? I'm doing research for an article I'm writing.

VHawk