California Code, Streets and Highways Code - SHC § 18091

(a) An estimate of the cost and expense of the improvement for the ensuing 12-month period or the ensuing fiscal year.

(b) A diagram showing the assessment district referred to in the resolution of intention, also the boundaries and dimensions of the respective lots or parcels of land within the district as it existed at the time of the making of the last mentioned diagram, each of which lots or parcels shall be given a separate number on the diagram.

(c) A schedule showing the proportionate amount of the assessment to be charged in proportion to the benefits to be received by each lot or parcel shown on the diagram required by subdivision (b) of this section.