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o Table 15 (CONTI' Stream classifi f os and water quality standards Colorado v. w oa 10 "'":.? Numeric Standards Temporary N Basin: Piedra River Inorganic Metals Modificatio"U Stream Senrnent OescriDtion Desla C1anifications Ph"sical and 81010";081 mo}1 '-/I Qualifiers 1. All tributaries to the Piedra River, Aq Life Cold 1 D.O. = 6.0 mg/l NH3 (ae) = TVS S = 0.002 As (ae) = 50 (Tree) Fe (chi = 300 (dls) NI lac/ch) = TVS -..: including alllak8s and reservoirs-. Recreation 1 D.O. (ap) = 7.0 mgll NH3 (ch) = 0.02 B = 0.75 Cd (ac) = TVS (tr) Fe (ch) = 1000 (Tree) Sa (ae) = 10 (Tree) which are within the Wemlnuche Water Supply pH = 6.5-9.0 C12 (ac) = 0.019 N02 = 0.05 Cd (chI = TVS Pb (ae/ch) = TVS Ag (acl = TVS Wilderness Area. Agriculture F. Coli = 2001100 ml CI2 lch) = 0.011 N03 = 10 Crill (ac) = 50 (Tree) Mn (chI = 50 (dia) Ag (chI = lVS ltrl CN = 0.005 CI = 250 CrVI (ac/ch) = lVS Mn (chi = 1000 (Tree) Zn (ac/chl = TVS 504 = 250 Cu (ae/ch) = lV5 Hg (ch) = 0.01 (Tree) 2. Mainstem of the Piedra River, Aq life Cold 1 D.O. = 6.0 mgll NHa tac) = lV5 5 = 0.002 As Cae) = 50 (Tree) Fe (eh) = 300 (dis) Ni lac/chI = TV5 Including the East and Middle Forks, Recreation 1 D.O. (sp) = 7.0 mgll NHa (chi = 0.02 B = 0.75 Cd (acl = TV5 ttr) Fe (chi = 1000 ITrecl Se (acl = 10 (Tree)_ from the boundary of the Weminuche Water Supply pH = 6.5.9.0 CI2 (ac) = 0.019 N02 = 0.05 Cd Ichl = TVS Pb (ac/ch) = TVS Ag lac) = TVS Wilderness Area to the confluence Agriculture F. Coli = 2001100 ml CI2 (eh) = 0.011 N03 = 10 Crllllacl = 50 (Tree) Mn (eh) = 50 (dis) Ag lch) = TVS (trl with Indian Creek, except for the CN = 0.005 CI = 250 CrVI (ae/eh) = TV5 Mn (ch) = 1000 (Trecl Zn (ae/chl = TVS specific listing in Segment 3. 504 = 250 Cu (ac/ch) = TVS Hg (ch) = 0.01 (Tree) 3. Mainstem of the East Fork of the Aq Ufe Cold 1 D.O. = 6.0 mg/I NH3 lac) = TVS S = 0.002 As (acl = 50 ITrec) Fe (ch) = 300 (disl Ni lac/chI = TV5 Piedra River from the Piedra Falls Recreation 1 D.O. (spl = 7.0 mg/I NHa (ch) = 0.02 B = 0.75 Cd (acl = TVS (tr) Fe (ch) = 1000 (Trecl Se (ac) = 10 (Trec) Ditch to the confluence with Pagosa Water Supply pH = 6.5-9.0 CI2 lacl = 0.019 N02 = 0.05 Cd (chi = TVS Pb (ac/ch) = TVS Ag (ac) = TVS Creek. Agriculture F. Coli = 2001100 ml CI2 (ch) = 0.011 N03 = 10 Crill (acl = 50 (Trec) Mn (chI = 50 ldis) Ag lch) = TVS {trl eN = 0.005 CI = 250 CrVI (ae/chl = TV5 Mn (chi = 1000 ITrec) Zn (ae/chl = TVS 504 = 250 Cu (ac/chl = TVS Hg (ch) = 0.01 (Trec) 4. Mainstem of the Piedra River from Aq Ufe Cold 1 D.O. = 6.0 mg/I NHa lac) = TVS S = 0.002 As (ch) = 50 Fe (ch) = '500 5e {chi = 20 All metals are the confluence with Indian Creek to Recreation 1 D.O. (spl = 7.0 mgll NH3 (chi = 0.02 B = 0.75 Cd {chi = 0.4 Pb lchl = 4 Ag (ch) = 0.1 T rec unless Navajo Reservoir. Agriculture pH = 6.5-9.0 CI2 (ac) = 0.019 N02 = 0.05 Crill (chi = 100 Mn lchl = 1000 Zn (chi = 50 otherwise F. Coli = 20011 00 ml CI2 lch) = 0.011 NOa = 100 CrVI (ch) = 25 Hg lchl = 0.05 noted. eN = 0.005 Culch) =16 Ni (ch) = 50 5. All tributaries to the Piedra River, Aq life Cold 1 D.O. = 6.0 mg/l NHa (acl = TVS S = 0.002 As (ac) '" 50 (Trecl Fe (ch) = 300 (disl Ni lac/chi = TVS including all lakes and reservoirs, from Recreation 1 D.O. (sp) = 7.0 mg/l NHa (chi = 0.02 B = 0.75 Cd lac) = lVS (trl Fe (chi = 1000 ITrecl Se (ac) = 10 (Trec) the boundary of the Weminuche Water Supply pH = 6.5-9.0 CI2 (acl = 0.019 N02 = 0.05 Cd (chI = TVS Pb (ac/chl = TVS Ag lac) = TV5 Wilderness Area to a point Agriculture F. Coli = 2001100 ml CI2 (ch) = 0.011 N03 = 10 Crill (ac) = 50 (Treel Mn (chi = 50 ldis) Ag (chI = TVS (trl immediately below the confluence CN = 0.005 CI = 250 CrVI (ac/ch} = TVS Mn (chi = 1000 (Trecl Zn (ac/chl = TVS with Devil Creek. S04 = 250 Cu lac/chi '" TV5 Hg {chi = 0.01 (Trecl , 6. All tributaries to the Piedra River, UP Aq life Warm 2 0.0. = 5.0 mgll including all lakes and reservoirs, from Recreation 2 pH = 6.5-9.0 a point immediately below the Agriculture F. Coli = 2000/1 OOml confluence with Devil Creek to Navajo Reservoir, except for the specific listings in Segment 7.