It must be clear and apparent by the grant, Riparian owner is entitled to all accessions made to his land by the retreating of the river from its former limits, or by slow and secret deposit so as to leave the soil theretofore inundated uncovered by water.

—the common law rule is applied to non-navigable lakes in that state; hence owners of land upon Lake Malheur having riparian rights, take to the center of that lake.

The rule as adopted in Oregon is that it is a well-established principle that formations by slow and gradual accretion belong to the owner of the land when made by a stream forming his boundary and opposite thereto

—it was held that the river is the boundary of lands lying along the Willamette, and that accretions belong to the riparian owner.

Where a navigable stream has been meandered in making the public surveys the meander line is run for the purpose of marking the sinuosities of the stream rather than the boundaries of the tract of land bordering on such streams, the stream itself and not the meander line as actually run on the ground, is the true boundary of tracts bordering on such stream.

[BOOK] River & Lake Boundaries: Surveying Water Boundaries--a Manual

[BOOK] Public trust rights

[CITATION] Survey of Oregon's water laws

[CITATION] Cases and materials on environmental law