Every company assessed under the provisions of this chapter shall be entitled on its own motion to a hearing and to present evidence before the department of revenue, within the ten working days following the hearing request period, relating to the value of the operating property of such company and to the value of the other taxable property in the counties in which the operating property of such company is situate. Upon request in writing for such hearing, which must be presented to the department of revenue within the first ten working days of July following the making of the assessment, the department shall appoint a time and place therefor, within the respective periods aforesaid, the hearing to be conducted in such manner as the department shall direct. Hearings provided for in this section may be held at such times and in such places throughout the state as the department may deem proper or necessary and may be adjourned from time to time and from place to place.