The county engineer may be appointed by the board of county commissioners to perform the necessary civil engineering work of the county. He shall receive a salary to be fixed by the county commissioners. In addition, the board of county commissioners shall pay the county engineer’s actual and necessary traveling expenses incurred in the performance of his official duties upon the filing of itemized and verified vouchers signed by the county engineer and approved by the board of county commissioners. The said board shall allow the county engineer the necessary and required assistants, engineers, surveyors, superintendents, foremen, accountants, clerks and all other help needed for the performance of his duties. Allowances for such assistants or help herein referred to shall be for work actually performed per diem and such allowance shall be paid only to the person or persons employed upon sworn claims presented to the board of county commissioners.

All compensation or salaries hereinbefore provided for and for the county’s civil engineering work, the building and maintenance of roads and bridges, and the various duties performed under the county engineer’s supervision, shall be paid from the county road and bridge fund in counties not under the county unit system, which funds are derived from the tax levies authorized by Kan. Stat. Ann. § 79-1947. The engineer shall not receive and retain any fees, costs, mileage, commissions or compensation of any kind for any service which he is authorized to perform because of his office, except as herein elsewhere provided, but shall turn over such fees, costs, mileage, commissions or compensation to the county treasurer, and the same shall become a part of the general revenue fund of the county.