Tri Counties Bank, Grass Valley Olympia Park Branch Basic Info Reviews Routing Numbers Map & Direction Name: Tri Counties Bank, Grass Valley Olympia Park Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 709 Sutton Way, Suite A Grass Valley, California 95945 Nevada County View other branches Phone: 530-477-4020 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer121132394YY121135045YY121141738NY121142313YY121142766NY121143422YN From: To: