Added USGS stream definition constructor method
Added USGS stream definition constructor method

mkl-/scioncc,ooici/pyon,mkl-/scioncc,crchemist/scioncc,mkl-/scioncc,ooici/pyon,scionrep/scioncc,scionrep/scioncc,crchemist/scioncc,scionrep/scioncc,crchemist/scioncc