“Mudline datum” means
- for a beach location, the plane of mean low water depth extended beneath the well site;
- for a location on a shifting natural island, the depth at which a horizontal plane through the toe of the island intersects the wellbore;
- for a location on an artificial island, the depth of the mudline as it existed before construction of the island; or
- for other offshore locations, the mudline.
Source: Alaska Oil and Gas Conservation Commission, Definitions, Alaska Admin. Code tit. 20, § 25.990, December 7, 2012. Regulations