Del. Code tit. 7, § 4211

The Department shall require that dam owners and operators develop, use and update as necessary an operation and maintenance plan which provides guidance and instruction to personnel for the proper operation and maintenance of any reservoir or dam to which this chapter applies to safeguard life and property. The operation and maintenance plan shall be subject to the approval of the Department and may be reviewed, modified or amended by the Department as deemed necessary to safeguard life and property. The Secretary may adopt, amend, modify or repeal standards for the maintenance and operation of dams as may be necessary for the purposes of this section. The Department may vary the standards applicable to the various dams giving due consideration to the type and location of the structure, the hazards to which it may be exposed, and the peril of life and property in the event of a failure or misoperation of the dam.