The magistrate's office decided to collect the annual amount of 9950 ryo, which originally came from the Sahaisho, by 'tax for dredging,' and after 1775, the citizens had to pay three times per year (in February, May, and October), and eventually, 4900 ryo out of these installed payments were used for the dredging.
差配所から納めていた冥加金1年9950両を「川浚冥加金」という名目で市民から徴収することとし、安永4年（1775年）以後は1年3回2月、5月、10月に分納させ、この金額のなかからなお4900両を川浚費に支弁した。