Visual characteristics of apparent sub-marine channel on orthophoto maps.End of parallel banks: point at which bank to bank river mouth line loses approximate "perpendicular" nature.In addition, one or more of the following criteria were used by MassDEP to determine the final Mouth of Coastal River maps: Designations of perennial streams on the United States Geological Survey quadrangle maps served as the basis for the initial identification of all rivers in Massachusetts. The final maps are a culmination of a year's effort that included distribution of draft maps for public comment, receipt and review of over 100 written comments, and field surveys for many of the more difficult mouth of river lines.īy adopting a uniform approach to mapping river mouths, these maps should reduce the need for individual MOR delineations and in turn provide a predictable means for project review for landowners, conservation commissions and MassDEP. Each community received a set of maps corresponding to the rivers in their community. These maps, dated March 1, 2005, represent the final MOR maps for each community. Land upstream of the MOR lines includes Riverfront Areas subject to the protections afforded by the wetlands regulations any land seaward of the MOR line is not subject to jurisdiction as a Riverfront Area but remains subject to other inland and coastal provisions of the Wetlands Protection Act. The MOR lines represent the limit of Riverfront Area jurisdiction under the Wetlands Protection Act. These maps identify the Mouth Of The River (MOR) for coastal rivers in order to provide a clear, consistent, and predictable means of locating all river mouths in the Commonwealth. General coastal project review plan requirements can be obtained from Commission staff upon request.On March 1, 2005, DEP published the Massachusetts Mouth of Coastal River Maps. Elevation datum must match that of the tidal datum (NAVD88).Control benchmarks are the monuments on the ground that have been precisely located and referenced to the local tide stations and vertical datum used to calculate the Mean High Tide elevation. Local published control benchmarks should be used in determining elevations at the survey site. The most current tidal epoch should also be used (Presently 1983-2001 epoch).The current tidal datum should be used (Presently NAVD88).To determine the elevation of Mean High Tide Line on the shore one should use either the published Mean High Water elevation from a National Oceanic and Atmospheric Agency published tide station closest to the project or a linear interpolation between two adjacent tide stations, depending on the most appropriate approach in light of tidal regime characteristics. Tips on how to conduct a Mean High Tide Line Survey where the boundary remains ambulatory: Resources Code § 6357) and is a necessary party to any title or boundary action involving granted tide and submerged lands (Pub. The Commission is authorized to establish the ordinary high water mark (or ordinary low water mark) by agreement or action to quiet title (Pub. Typically, this includes using the National Oceanic and Atmospheric Agency’s measurement and calculation of the mean high tide tidal datum in the vicinity of the lands involved. The United States Supreme Court has ruled that in tidal areas the boundary is to be located by identifying the intersection of the mean high tide line with the shore ( Borax Consol., Ltd v. The Commission is the recognized authority for determining the location of the ordinary high water mark in California. (Civil Code §§ 670, 830) The Commission has exclusive jurisdiction over ungranted tide and submerged lands and is the successor agency to the Surveyor General and the Division of State Lands (Pub. The California Civil Code defines the boundary of tidelands as the ordinary high water mark. One of the important responsibilities of the Commission is to determine the extent and location of California’s sovereign tide and submerged lands.
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