The engineer shall prior to completion of the contract make a diagram of the property affected or benefited by the proposed work, as described in the resolution of intention, which is to be assessed to pay the costs and expenses thereof.

The diagram shall show each separate lot or parcel of land within the limits of the assessment district, and the dimensions of each such lot or parcel of land, and the relative location of the same to the work proposed to be done.

Immediately after its completion the diagram shall be delivered to the superintendent of streets, who shall immediately, after the contractor has fulfilled his contract to the satisfaction of the superintendent of streets or the legislative body, on appeal, proceed to estimate upon the lots or parcels of land within the assessment district, as shown by the diagram, the benefits arising from such work, and to be received by each such lot or parcel of land. He shall thereupon assess upon and against the lands in the assessment district the total amount of the costs and expenses of such work, and in so doing shall assess the total sum upon the several lots or parcels of land in the assessment district, benefited thereby, in proportion to the estimated benefits to be received by each of the said several lots or parcels of land.

In other respects the assessment shall be made in accordance with the provisions of Chapter 16.