(a) An outline of the project insofar as it affects the district and as adopted by the Congress of the United States must be filed in the office of the district and made available for inspection by any interested parties.
(b) There must also be filed with the outline an estimate prepared by the engineer of the district showing the total approximate cost of the project which the district will be required to pay in the event the district exercises the authority conferred by this subchapter with respect to the project. However, if the district does not have a regularly retained engineer, the district may employ a competent engineer to prepare and file the estimate, and, in that event, the district may pay reasonable compensation to the engineer so employed.
(c) Notice of the filing of the outline and estimate shall be given in each county of the district by publication of a notice for at least one (1) insertion in a newspaper published and having a bona fide circulation in each of the counties of the district.