In those counties in which road funds have been used for marine navigation and moorage purposes as specified in RCW 36.82.070, the county engineer shall submit a certification showing the amount of county road fund used for those activities related to marine navigation and moorage purposes performed contiguous with, adjacent to, or offshore concomitant to the county road right of way. Such certification shall be submitted to the county road administration board no later than April 1st of each year.