Rule 17.30.615 - WATER-USE CLASSIFICATIONS AND DESCRIPTIONS - CONSTRUCTED DITCHES, SEASONAL AND SEMI-PERMANENT LAKES, AND EPHEMERAL STREAMS(1) The water-use classifications for waters in constructed irrigation ditches and drain ditches that are state waters as defined in 75-5-103, MCA, and the water-use classification for waters in ephemeral streams and seasonal and semi-permanent lakes and ponds are as follows: (a) waters in constructed irrigation and drain ditches that contain controlled flows of surface water and are de-watered during the non-irrigation season............................................ D-1(b) waters in constructed irrigation and drain ditches that contain controlled flows of surface water mixed with ground water............................................................................................ D-2(c) ephemeral streams including ephemeral streams with flows that are periodically augmented by discharges from point sources.................................................................. E-1(d) ephemeral streams with flows that are augmented by continuous discharges from point sources................................................................................................................................... E-2(e) seasonal lakes and ponds................................................................................ E-3(f) semi-permanent lakes and ponds, not including reservoirs, that have an electrical conductivity (EC) less than 7,000 µS/cm........................................................................... E-4(g) semi-permanent lakes and ponds, not including reservoirs, that seasonally have an EC equal to or greater than 7,000 µS/cm................................................................................ E-5(h) streams with low or sporadic flow that, because of natural hydro-geomorphic and hydrologic conditions, are not able to support fish............................................................ F-1(2) Prior to reclassifying a specific water body classified in ARM 17.30.607 through 17.30.614 under one of the water-use classifications identified in (1) (a) through (h) and before the U.S. Environmental Protection Agency's approval of the water body's revised classification, a use attainability analysis must be conducted in accordance with 40 CFR 131.10 (g), (h), and (j).Mont. Admin. r. 17.30.615
NEW, 2002 MAR p. 2196, Eff. 8/16/02; AMD, 2004 MAR p. 725, Eff. 4/9/04; AMD, 2006 MAR p. 528, Eff. 2/24/06.75-5-301, MCA; IMP, 75-5-301, MCA;