Hawaii Revised Statutes Division 1. Government § 264-9

(a) All excess materials remaining at the site of the work done under any permit shall be removed at the expense of the permit holder. The excess material shall not be deposited or placed within any highway right-of-way except with the approval of the director of transportation or the director's authorized representative.

(b) The permit holder, at the permit holder's own expense and upon completion of the work for which the permit was issued, shall backfill all trenches or other openings and make all necessary repairs to or replacement of any concrete gutter, curb, sidewalk, or any other structure in public use and restore or replace any plants, landscaping, signs, markers, or other facilities or improvements that were cut or damaged by the permit holder to a condition similar to that which existed before work was begun under the permit.

(c) Except as otherwise provided in section 264-33, the permit holder shall be responsible for all costs in the installation, construction, repair, removal, restoration, reconstruction or replacement of any improvement within the right-of-way of any state highway.