Third in a series on water boundaries.
There are several reasons why a surveyor might be asked to construct apportionment lines along waterfront parcels. The most common occurrence, and generally the most contentious, is when a party wishes to build or extend a pier in front of his or her upland holdings. Another occurs when accretion adds land to several contiguous upland parcels, or, conversely, when contiguous upland parcel owners also hold title to adjoining submerged lands. Each owner's property rights-either riparian or fee title-will be bounded by some lateral line extending from the point where his or her upland boundary intersects the line of submerged interest (usually either ordinary high or low water) or (in the case of accretion) the line of an "ancient bank."