"Watercourse", as used in RSA 485-A:2, XIV, means a channel providing for the conveyance of water, whether natural or artificial, which is scoured, indicating periods of concentrated flow. The term does not include drainage swales and areas of poorly drained soils in which no scour channel exists.
N.H. Admin. Code § Env-Wq 1002.77
(See Revision Note at chapter heading for Env-Wq 1000) #9086, eff 2-9-08; renumbered by #9904-A (from Env-Wq 1002.75)