The average foreman salary at Walnut was $113,871 , which is 16 percent lower than the average salary for this job in California, but 68 percent higher than the national average for this job . Foreman salaries at Walnut typically range from $102,409 to $125,333 (25th to 75th percentile). The highest reported foreman salary was $125,333. There are 2 employees at Walnut with the job title foreman.