For an improvement project under section 61-35-48 and defraying the cost of the project by special assessments, a district may create water districts, sewer districts, and water and sewer districts, and may extend any such district when necessary. The appropriate special improvement district must be created by resolution. The district must be designated by a name appropriate to the type of improvement for which it is created and by a number distinguishing it from other improvement districts. Nothing in this chapter prevents a district from making and financing any improvement and levying special assessments for the improvement under any alternate procedure in this title. For examinations or surveys, the board or its employees, after written notice to each landowner, may enter upon any land on which the proposed project is located or any other lands necessary to gain access.