; (bb) a more or less continuous deposit of fine shell or debris on the foreshore or berm; (cc) other physical markings or characteristics; (dd) vegetation lines; (ee) tidal gages; or (ff) other suitable means that delineate the general height reached by a rising tide. (vi) Intermittent The term intermittent means surface water that flows continuously during certain times of the year and more than in direct response to precipitation, such as water that flows seasonally when the groundwater table is elevated or when snowpack melts. (vii) Lake, pond, or covered impoundment (I) In general The term lake, pond, or covered impoundment means a standing body of open water that contributes surface water flow to a body of water described in clause (i) or (ii) of subparagraph (A) during a typical year through— (aa) direct means; or (bb) 1 or more bodies of water described in clause (iii), (iv), or (v) of that subparagraph. (II) Inclusion The term lake, pond, or covered impoundment includes a body of water described in subclause (I) that— (aa) contributes surface water flow to a downstream body of water described in subparagraph (A) in a typical year through— (AA) a channelized surface water feature that is not otherwise described in that subparagraph; (BB) a culvert, dike, spillway, or other similar artificial feature; or (CC) a debris pile boulder field, or similar natural feature; or (bb) is inundated by flooding from a body of water described in clause (i), (ii), (iii), or (iv) of subparagraph (A) during a typical year. (viii) Ordinary high water mark The term ordinary high water mark means a line on the shore of a body of water— (I) established by the fluctuations of the water; and (II) indicated by physical characteristics such as— (aa) a clear, natural line impressed on the bank; (bb) shelving; (cc) changes in the character of the soil; (dd) destruction of terrestrial vegetation; (ee) the presence of litter and debris