1. Within thirty days after organizing, the board of trustees may appoint a competent sanitary engineer as chief engineer, who may be an individual, copartnership or corporation, and who shall engage such assistants as the board of trustees may approve by resolution. The chief engineer shall have control of the engineering work in the district; he shall make all necessary surveys of the land and other property within the district and shall make a report, in writing, to the board of trustees with maps and profiles of said survey or surveys where necessary, which report shall contain a plan for sewerage system and the disposal of sewage. The said maps and profiles shall also indicate, as far as necessary, the location of any public roads, streets or highways, railroads and other rights-of-way, and other property or improvements in said district.

2. Upon receipt of the said final report and plan for sewage disposal, the board of trustees may adopt such report or any modification thereof after consulting with the chief engineer, and thereafter such adopted report shall be known and designated as the “Sewer Plan of ______ District”, which plan shall be filed with the board of trustees and embodied in the records of the district. The board of trustees may purchase upon such terms as they may deem best, existing surveys, maps, profiles, and/or plans suitable for use in the whole or in part of the sewer plan.

3. Such engineer or engineering firm shall not receive as a salary, or an aggregate of salary and fees, in any one year, a sum in excess of the sum fixed by law as the limit of salary provided for the highway engineer in the county in which such district is located.