Call Before You DigState law requires that before anyone begins digging or excavating, they need to first make the “One Call” for utility locations.The number to Stop-Call Before You Dig is 1-800-424-5555. Washington Utilities Coordinating Council Supporting Documents Toppenish Construction Standards 8.36 MB 2017 Toppenish Water System Plan 11.05 MB Toppenish General Sewer Plan 45.46 MB Print