The assessors in apportioning the assessment on each tract of land shall, as information for the board set out, opposite each sum assessed for each particular tract of land, in separate columns respectively, the amount that they determine that each tract is so assessed by reason of benefit from the flood control features of the works involved in the plans, and also the amount that they deem each tract of land is so assessed by reason of all other benefit from the works.
Ca. Water Code § 8788