When used in this subchapter, unless a different meaning clearly appears from the context:
(1) "Bed" means an area on or above state-owned land between the low-water marks of a navigable river channel, excepting any portion of the land greater than 50 feet vertically below the thalweg of the channel and excepting any minerals therein.
(2) "Board" means the state Board of Land Commissioners.
(3) "Calculated market value" means the market value of a footprint derived by multiplying the current per acre value of the land above the low-water mark on the adjacent larger parcel nearest the footprint by the footprint area, then discounting the result by fifty percent.
(4) "Commercial use" means an activity conducted on, within, or over a navigable river for profit, excluding any extraction of minerals, but including, but not limited to:
(b) restaurants; or
(c) retail service outlets at that location.
(5) "Department" means the Department of Natural Resources and Conservation.
(6) "Easement" means a nonpossessory right of use issued either permanently or for a term of years for a particular purpose in a defined area of servient real property appurtenant to, and for the benefit of a dominant tenement property, which is binding upon subsequent lessees, users, and owners of the real property.
(7) "Footprint" means:
(a) an area which may be occupied by a structure;
(b) an area which may be occupied for the construction or maintenance of a structure; or
(c) an interruption or modification to the bed of a navigable river below the low-water mark as provided in 70-16-201, MCA.
(8) "Hazard" means a physical condition of an improvement, structure, or facility which creates an extraordinary risk of physical harm to persons or property which is so obvious and immediately dangerous that an ordinarily prudent person would observe and appreciate such extraordinary risk and take action to address or eliminate such risk.
(9) "Land classification" means a categorization of land according to its principal value, as defined in 77-1-401, MCA.
(10) "Land use license" means a contract issued by the department for land use, not to exceed a ten-year term, for any use of state land other than its primary classification which is compatible with the department's multiple use objectives and the primary classification of the land.
(11) "Lease" means a contractual authorization issued by the department to another party or entity for use of a footprint not to exceed 99 years.
(12) "Low-water mark" means the location of the water line of a navigable river at the lowest tenth percentile of historic annual flow as measured by the nearest upstream hydrograph station.
(a) As utilized in this definition, "historic annual flow" is a graph of water flow in the stream expressed in cubic feet per second (cfs) derived from an average of all existing hydrograph records for each day of the year at a hydrograph station immediately above the river segment in question (with water flows in cubic feet per second expressed on the 'y' axis and calendar days expressed on the 'x' axis).
(b) The "lowest tenth percentile" is determined by constructing a cumulative frequency graph of the average annual historic water flow rates measured by a particular hydrograph station, and determining the average annual flow rate which is exceeded 90 percent of the time in that cumulative frequency graph.
(13) "Marina" means a small harbor, boat basin, or moorage facility operated by a private club, enterprise, or municipality that provides boat berthing, docking and mooring, and incidental services such as mooring buoys, boat hoists/lifts, boat launch ramp, fishing, or retail services.
(14) "Navigable river" means a segment of a river adjudicated as navigable for title purposes by a court of competent jurisdiction.
(15) "Public use" means activities on navigable waters that are guaranteed by law to the general public to use navigable waters to fish, hunt, trap, navigate, camp, install docks and wharves, and recreate; provided that no physical occupation by a boat positioned, moored, or anchored in a specific location is made for any longer than fourteen days in any thirty-day period.
(16) "Specific location" means within a radius of 500 feet of any location where a structure or vessel was previously positioned, moored, or anchored upon the bed of a navigable river.
(17) "Thalweg" means the deepest portion of the active channel of a stream or river in any given cross-section of the stream or river.