In the filling of any marshland, swampland, tideland or tideflats no canal or waterway shall be constructed in connection therewith less than three hundred feet wide at the top between the shore lines and with sufficient slope to the sides or banks thereof to as nearly as practicable render bulkheadings or other protection against caving or falling in of said sides or banks unnecessary and of sufficient depth to meet all ordinary requirements of navigation and commerce.
RCW 35.56.200
Waterways constructed—Requirements.
1965 c 7 s 35.56.200
Official source: Washington State Legislature. Reproduced from public-domain Washington statutes; confirm against the official source for the current text. Not legal advice.