Cal. SHC § 5152

Any property owner whose property is to be assessed to pay the costs and expenses of the proposed work may at the time fixed in the resolution of intention for hearing of objections to the proposed work, appear before the legislative body and make objection to the proposed grade or proposed modification of grade. A failure to make objection at that time shall be deemed to be a waiver of all objections to the proposed grade or proposed change or modification of grade and shall operate as a bar to any claim for damages or any subsequent action looking to the prevention of the work or the recovery of damages on account of the performance of the work to such grade or changed grade.