REGION: 10 Desig Classifications NUMERIC STANDARDS TEMPORARY

35.6(4) STREAM CLASSIFICATIONS and WATER QUALITY STANDARDS

PHYSICAL MODIFICATIONS INORGANIC METALS and AND BASIN: Upper Gunnison River Basin mg/l ug/l Stream Segment Description BIOLOGICAL QUALIFIERS

o 1. All tributaries to the Gunnison River, including and wetlands, within OW Aq Life Cold 1 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS the La Garita, Powderhorn, West Elk, Collegiate Peaks, Maroon Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Bells, Fossil Ridge, or Uncompahgre Wilderness Areas. Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.02 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Zn(ac/ch)=TVS SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS

o 2. All tributaries and wetlands from North Beaver Creek to Meyers OW Aq Life Cold 1 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS Gulch, from the West Elk Wilderness boundary to their Recreation E D.O. = 6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS confluences with Blue Mesa Reservoir, Morrow Point Reservoir, Water Supply D.O. (sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.02 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS or the Gunnison River, excluding Steuben Creek, North Willow Agriculture pH = 6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) Creek, and Soap Creek. E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Zn(ac/ch)=TVS SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS

3. Deleted.

o 4. Mainstem of the Taylor River, including all tributaries and Aq Life Cold 1 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS wetlands, from the source to the confluence with the Gunnison Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS River except for those in Segment 1. Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Zn(ac/ch)=TVS SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS

o 5a. Mainstem of the East River, including all tributaries and wetlands, Aq Life Cold 1 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS from its sources to a point immediately above the confluence with Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS the Slate River, except for Segment 1. Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Zn(ac/ch)=TVS SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS

o 5b. Mainstem of the East River from a point immediately above the Aq Life Cold 1 T=TVS(CS-II) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS Slate River to the confluence with the Gunnison River. Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture pH=6.5-9.0 CN=0.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Zn(ac/ch)=TVS SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS

o 6a. All tributaries to the East River from a point immediately above its Aq Life Cold 2 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)= 340 Fe(ch)=1000(Trec) Ni(ac/ch)=TVS confluence with the Slate River to its confluence with the Recreation U D.O.=6.0 mg/l Cl2(ac)=0.019 B(ch)=0.75 As(ch)=100(Trec) Pb(ac/ch)=TVS Se(ac/ch)=TVS Gunnison, excluding the listings in Segments 6b and 6c. Agriculture D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.5 Cd(ac)=TVS(tr) Mn(ac/ch)=TVS Ag(ac)=TVS pH=6.5-9.0 CN=.005 NO3(ac)=100 Cd(ch)=TVS Hg(ch)=0.01(tot) Ag(ch)=TVS(tr) E.Coli=126/100ml CrIII(ac/ch)= TVS Mo(ch)=160(Trec) Zn(ac/ch)=TVS CrIII(ch)=100(Trec) CrVI(ac/ch)=TVS Cu(ac/ch)=TVS

o 6b. Cement Creek and all its tributaries and wetlands from the source Aq Life Cold 1 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS to a point immediately above the confluence with Horse Basin Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Creek. Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Zn(ac/ch)=TVS SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS

o 6c. Cement Creek, including all tributaries and wetlands, from a point Aq Life Cold 1 T=TVS(CS-II) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS immediately above the confluence with Horse Basin Creek to the Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS confluence with the East River. Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture pH=6.5-9.0 CN=0.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Zn(ac/ch)=TVS SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS

35.6(4) STREAM CLASSIFICATIONS and WATER QUALITY STANDARDS

REGION: 10 Desig Classifications NUMERIC STANDARDS TEMPORARY

PHYSICAL MODIFICATIONS INORGANIC METALS and AND BASIN: Upper Gunnison River Basin mg/l ug/l Stream Segment Description BIOLOGICAL QUALIFIERS

o 7. Mainstem of the Slate River from its source to a point immediately Aq Life Cold 1 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS above the confluence with Coal Creek. Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) E.Coli=126/100ml Cl=250 CrIII(ac)=50(rec) Mn(ch)=WS(dis) Zn(ac/ch)=TVS SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS

o 8. Mainstem of the Slate River from a point immediately above the Aq Life Cold 1 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS confluence with Coal Creek to the confluence with the East River. Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Zn(ac/ch)=TVS SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS

o 9. All tributaries and wetlands to the Slate River except for specific Aq Life Cold 1 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS listings in Segments 1, 10a, 10b, 11, 12 and 13. Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Zn(ac/ch)=TVS SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) CrVI(ac/ch)=TVS Mo(ch)=210(Trec) Cu(ac/ch)=TVS

o 10a. Mainstem of Oh-Be-Joyful Creek from the boundary of the Aq Life Cold 1 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=1000(Trec) Ni(ac/ch)=TVS Raggeds Wilderness Area to the confluence with Slate River. Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=7.6(Trec) Pb(ac)=TVS Se(ac/ch)=TVS Agriculture D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ch)= 6.6 Ag(ac)=TVS pH=6.5-9.0 CN=.005 NO3=100 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) E.Coli=126/100ml CrIII(ac/ch)=TVS Hg(ch)=0.01(tot) Zn(ac/ch)=TVS CrIII(ch)=100(Trec) Mo(ch)=160(Trec) CrVI(ac/ch)=TVS Ni(ac/ch)=TVS Cu(ac)/(ch)=TVS

o 10b. All tributaries, including wetlands, to Redwell Creek. Aq Life Cold 1 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=1000(Trec) Se(ac/ch)=TVS Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=7.6(Trec) Pb(ac)=TVS Ag(ac)=TVS Agriculture D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ch)=407 Ag(ch)=TVS(tr) pH=6.5-9.0 CN=0.005 NO3=100 Cd(ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS E.Coli=126/100ml CrIII(ac/ch)=TVS Hg(ch)=0.01(tot) CrIII(ch)=100(Trec) Mo(ch)=160(Trec) CrVI(ac/ch)=TVS Ni(ac/ch)=TVS Cu(ac)/(ch)=TVS

o 11. Mainstem of Coal Creek from a point immediately above the Aq Life Cold 1 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=1000(Trec) Se(ac/ch)=TVS confluence with Elk Creek to a point immediately below the Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Pb(ac/ch)=TVS Ag(ac)=TVS Crested Butte Water Supply intake which is above the confluence Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 CrIII(ac)=50(Trec) Mn(ac/ch)=TVS Ag(ch)=TVS(tr) with the Mount Emmons/Red Lady Basin drainage; and Elk Creek Agriculture pH=6.5-9.0 CN=.005 NO3=10 CrIII(ch)=TVS Mn(ch)=WS(dis) Zn(ac/ch)=TVS and its tributaries and wetlands from its source to its confluence E.Coli=126/100ml Cl=250 Cd(ac)=TVS(tr) Hg(ch)=0.01(tot) with Coal Creek. SO4=WS Cd(ch)=TVS Mo(ch)=210(Trec) CrVI(ac/ch)=TVS Ni(ac/ch)=TVS Cu(ac/ch)=TVS Fe(ch)=WS(dis)

o 12. Mainstem of Coal Creek, including all tributaries and wetlands from Aq Life Cold 1 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ag(ac)=TVS Temporary a point immediately below the Crested Butte Water Supply intake Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)= 0.02(Trec) Fe(ch)=1000(Trec) Ag(ch)=TVS(tr) Modifications: which is above the confluence with the Mount Emmons/Red Lady Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Zn(ac/ch)=TVS Type A Basin drainage to the confluence with the Slate River, with the Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS As(ch)=current exception of Wildcat Creek. E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=191(dis) conditions(Trec) SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) Expiration date CrVI(ac/ch)=TVS Mo(ch)=160(Trec) June 30, 2014 Cu(ac/ch)=TVS Ni(ac/ch)=TVS Se(ac/ch)=TVS Type B Cd(ch)= 2.1 Cu(ch)=current conditions Zn(ch)= 440 Expiration date June 30, 2016

35.6(4) STREAM CLASSIFICATIONS and WATER QUALITY STANDARDS

REGION: 10 Desig Classifications NUMERIC STANDARDS TEMPORARY

PHYSICAL MODIFICATIONS INORGANIC METALS and AND BASIN: Upper Gunnison River Basin mg/l ug/l Stream Segment Description BIOLOGICAL QUALIFIERS

o 13. Mainstem of Woods Creek from the source to the confluence with Aq Life Cold 2 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS Water+Fish Washington Gulch. Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Standards Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Zn(ac/ch)=TVS SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS

o 14. Mainstem of the Gunnison River from its inception at the Aq Life Cold 1 T=TVS(CS-II) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Se(ac/ch)=TVS confluence of the East and Taylor rivers to the inlet of Blue Mesa Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Ag(ac)=TVS Reservoir. Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ch)=TVS(tr) Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS Ni(ac/ch)=TVS

o 15a. All tributaries and wetlands to the Gunnison River from its inception Aq Life Cold 2 T=TVS(CS-II) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Hg(ch)=0.01(tot) at the confluence of the East and Taylor Rivers to the County Road Recreation U D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02- Fe(ch)= 1800(Trec) Mo(ch)=160(Trec) 1 32 road crossing near the inlet of Blue Mesa Reservoir except for Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 10(Trec) Pb(ac/ch)=TVS Ni(ac/ch)=TVS the specific listings in Segments 1, 15b, 16a, 16b, 17 through 24, Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ac/ch)=TVS Mn(ac/ch)=TVS Se(ac/ch)=TVS and 26. E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Ag(ac/ch)=TVS SO4=WS CrIII(ch)=TVS Zn(ac/ch)=TVS CrVI(ac/ch)=TVS Cu(ac/ch)=TVS

o 15b. South Beaver Creek, including all tributaries and wetlands, from Aq Life Cold 1 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Se(ac/ch)=TVS the source to the Saguache/Gunnison County line. Recreation U D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Ag(ac/ch)=TVS Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac/ch)=TVS Pb(ac/ch)=TVS Zn(ac)=TVS Agriculture pH=6.5-9.0 CN=0.005 NO3=10 CrIII(ac)=50(Trec) Mn(ac/ch)=TVS Zn(ch)=TVS E.Coli=126/100ml Cl=250 CrIII(ch)=TVS Mn(ch)=WS(dis) SO4=WS CrVI(ac/ch)=TVS Hg(ch)=0.01(tot) Cu(ac/ch)=TVS Mo(ch)=160(Trec) Ni(ac/ch)=TVS

o 16a. Mainstem of Ohio Creek, from the source to a point immediately Aq Life Cold 1 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS below 7 Road. All tributaries to Ohio Creek with the exception of Recreation U D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Segment 1. Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Zn(ac/ch)=TVS SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS

16b. Mainstem of Ohio Creek from a point immediately below 7 Road to Aq Life Cold 1 Apr 16-Nov 15 NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS o the confluence with the Gunnison River. Recreation U T(DM)=21.7 C Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS o Water Supply T(MW AT)=17.0 C Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture Nov 16-Apr 15 CN=0.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) o T(DM)=13.0 C Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Zn(ac/ch)=TVS o T(MW AT)=9.0 C SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) D.O.=6.0 mg/l CrVI(ac/ch)=TVS Mo(ch)=160(Trec) D.O.(sp)=7.0 mg/l Cu(ac/ch)=TVS pH=6.5-9.0 E.Coli=126/100ml

o 17a. West Antelope Creek, including all tributaries and wetlands, from Aq Life Cold 1 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS the source to the confluence with Antelope Creek. Recreation U D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Zn(ac/ch)=TVS SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS

o 17b. Mainstem of Antelope Creek, including all tributaries and wetlands, Aq Life Cold 1 T=TVS(CS-II) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS from the source to the confluence with the Gunnison River, Recreation U D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS excluding the listings in Segment 17a. Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture pH=6.5-9.0 CN=0.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Zn(ac/ch)=TVS SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS 11

35.6(4) STREAM CLASSIFICATIONS and WATER QUALITY STANDARDS

REGION: 10 Desig Classifications NUMERIC STANDARDS TEMPORARY

PHYSICAL MODIFICATIONS INORGANIC METALS and AND BASIN: Upper Gunnison River Basin mg/l ug/l Stream Segment Description BIOLOGICAL QUALIFIERS

o 18a. Mainstem of Tomichi Creek and its wetlands from the source to Aq Life Cold 1 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Hg(ch)=0.01(tot) the confluence with Porphyry Creek. Recreation U D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Mo(ch)=160(Trec) Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ni(ac/ch)=TVS Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Se (ac/ch)=TVS E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Ag(ac)=TVS SO4=WS CrIII(ch)=TVS Ag(ch)=TVS(tr) CrVI(ac/ch)=TVS Zn(ac/ch)=TVS Cu(ac/ch)=TVS

o 18b. Mainstem of Tomichi Creek and its wetlands from the confluence Aq Life Cold 1 T=TVS(CS-II) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS with Porphyry Creek to the confluence with the Gunnison River. Recreation U D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se (ac/ch)=TVS Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture pH=6.5-9.0 CN=0.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Zn(ac/ch)=TVS SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS

o 19. All tributaries to Tomichi Creek, including wetlands, which are Aq Life Cold 1 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS within the boundaries of the Gunnison National Forest, except for Recreation U D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS specific listings in Segments 20 through 24. Mainstems of Barret, Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS Hot Springs, Razor and Quartz Creeks from their sources to their Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) confluences with Tomichi Creek. E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Zn(ac/ch)=TVS SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS

20. Mainstem of Indian Creek, including all tributaries, from the source Aq Life Cold 1 T=TVS(CS-I) oC S=0.002 As(ac)=340 Fe(ch)=1000(Trec) Se(ac/ch)=TVS Temporary to the confluence with Marshall Creek. Recreation E D.O.=6.0 mg/l NH3(ac/ch)=TVS B=0.75 As(ch)=7.6(Trec) Pb(ac/ch)=TVS Ag(ac)=TVS Modification at Agriculture D.O.(sp)=7.0 mg/l Cl2(ac)=0.019 NO2=0.05 Cd(ac)=TVS(tr) Mn(ac/ch)=TVS Ag(ch)=TVS(tr) sampling site SW-33 pH=6.5-9.0 Cl2(ch)=0.011 NO3=100 Cd(ch)=TVS Hg(ch)=0.01(tot) U(ac)= lowest (38.399519, - E.Coli=126/100ml CN=.005 CrIII(ac/ch)=TVS Mo(ch)=160(Trec) practical level 106.308190 WGS84) CrIII(ch)=100(Trec) Ni(ac/ch)=TVS U(ch)= lowest Type B CrVI(ac/ch)=TVS practical level June-July Cu(ac/ch)=TVS Zn(ac/ch)=TVS U(ac)=1515(tot) U(ch)=1349(tot) Aug-May U(ac)=1144(tot) U(ch)=1080(tot) Expiration date June 30, 2015

o 21. Mainstem of Marshall Creek, including all tributaries and wetlands, Aq Life Cold 1 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS from the source to the confluence with Tomichi Creek, except for Recreation U D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS specific listings in Segment 20. Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Zn(ac/ch)=TVS SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS

o 22. Mainstem of Gold Creek from Browns Gulch to the confluence with Aq Life Cold 1 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS Quartz Creek. Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Zn(ac/ch)=TVS SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS

o 23. Mainstem of Cochetopa Creek, including all tributaries and Aq Life Cold 1 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS wetlands, from the source to a point immediately below the Recreation U D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS confluence with West Pass Creek with the exception of Segment 1. Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) E.Coli=126/100ml Cl=250 CrIII(ac)= 50(Trec) Mn(ch)=WS(dis) Zn(ac/ch)=TVS SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS

35.6(4) STREAM CLASSIFICATIONS and WATER QUALITY STANDARDS

REGION: 10 Desig Classifications NUMERIC STANDARDS TEMPORARY

PHYSICAL MODIFICATIONS INORGANIC METALS and AND BASIN: Upper Gunnison River Basin mg/l ug/l Stream Segment Description BIOLOGICAL QUALIFIERS

o 24. Mainstem of Cochetopa Creek from a point immediately below the Aq Life Cold 1 T=TVS(CS-II) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS confluence with West Pass Creek to the confluence with Tomichi Recreation U D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Creek. Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Zn(ac/ch)=TVS SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS

o 25. The segments of the Gunnison River which inter-connect Blue Aq Life Cold 1 T=TVS(CS-II) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS Mesa Reservoir, Morrow Point Reservoir, and Crystal Reservoir. Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Zn(ac/ch)=TVS SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS

o 26. All tributaries, including wetlands, which are tributary to the Aq Life Cold 1 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS Gunnison River from County Road 32 to the inlet of Blue Mesa Recreation U D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Reservoir, Blue Mesa Reservoir, Morrow Point Reservoir, Crystal Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS Reservoir or the segments of the Gunnison River that interconnect Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) those reservoirs, with the exception of Segments 1,2, 29a, 29b, E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Zn(ac/ch)=TVS and 30 through 32. SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS

27. Deleted.

28. Deleted.

o 29a. Mainstem of the Lake Fork of the Gunnison including all Aq Life Cold 1 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS tributaries and wetlands, from the source to a point immediately Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS above the confluence with Eaton Creek, except for the specific Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS listing in Segments 1, 9b, 29b, 30, 31 and 32. Cebolla Creek, Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) including all tributaries and wetlands, from the source to the E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Zn(ac/ch)=TVS Hinsdale/Gunnison County line. Powderhorn Creek, including all SO4=WS CrIII(ch)=TVS Hg(ch)=0.01 (tot) tributaries and wetlands, from the source to the confluence with CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cebolla Creek. Cu(ac/ch)=TVS

o 29b. Mainstem of the Lake Fork of the Gunnison, including all Aq Life Cold 1 T=TVS(CS-II) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS tributaries and wetlands, from a point immediately above the Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS confluence with Eaton Creek, to Blue Mesa Reservoir. Cebolla Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS Creek, including all tributaries and wetlands, from the Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) Hinsdale/Gunnison County line, to Blue Mesa Reservoir, excluding E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Zn(ac/ch)=TVS the listings in Segment 29a. SO4=WS CrIII(ch)=TVS Hg(ch)=0.01 (tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS

o 30. Mainstem of Henson Creek, including all tributaries and wetlands, Aq Life Cold 1 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS from the source to the confluence with the Lake Fork of the Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000 (Trec) Se(ac/ch)=TVS Gunnison, except for the specific listing in Segments 31 and 32. Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) E.Coli=126/100ml Cl=250 CrIII(ch)=50(Trec) Mn(ch)=WS(dis) Zn(ac/ch)=TVS SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) CrVI (ac/ch)=TVS Mo(ch)=160(Trec) Cu (ac/ch)=TVS

o 31. Mainstem of Palmetto Gulch Creek including all tributaries. Aq Life Cold 2 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Cu(ac/ch)=TVS Ni(ac/ch)=TVS UP Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=100(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Agriculture D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac/ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS pH=6.5-9.0 CN=.005 NO3=100 CrIII(ac/ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS E.Coli=126/100ml CrIII(ch)=100(Trec) Hg(ch)=0.01(tot) Zn(ac/ch)=TVS CrVI(ac/ch)=TVS Mo(ch)=160(Trec)

o 32. North Fork of Henson Creek including all tributaries and wetlands, Aq Life Cold 1 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS from its source to the confluence with Henson Creek, except for Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS specific listings in Segment 1. Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Zn(ac/ch)=TVS SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS

35.6(4) STREAM CLASSIFICATIONS and WATER QUALITY STANDARDS

REGION: 10 Desig Classifications NUMERIC STANDARDS TEMPORARY

PHYSICAL MODIFICATIONS INORGANIC METALS and AND BASIN: Upper Gunnison River Basin mg/l ug/l Stream Segment Description BIOLOGICAL QUALIFIERS

o 33. All lakes and reservoirs that are tributary to the Gunnison River Aq Life Cold 1 T=TVS(CL) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Se(ac/ch)=TVS and within the La Garita, Powderhorn, West Elk, Collegiate Peaks, OW Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Ag(ac)=TVS Maroon Bells, Raggeds, Fossil Ridge, or Uncompahgre Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.02 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ch)=TVS(tr) Wilderness Areas. Agriculture pH=6.5-9.0 CN=0.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS Ni(ac/ch)=TVS

o 34. All lakes and reservoirs tributary to the Taylor River and the East Aq Life Cold 1 T=TVS(CL) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Se(ac/ch)=TVS River, from their sources to their confluence at the inception of the Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Ag(ac)=TVS Gunnison River, excluding the listings in Segments 33, 35 and 37. Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ch)=TVS(tr) This segment includes Meridian Lake, Nicholson Lake, Peanut Agriculture pH=6.5-9.0 CN=0.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS Lake, Lake Grant, Lily Pond, Pothole Reservoirs 1 and 2, Texas E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Lake, Mirror Lake, and Spring Creek Reservoir. SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS Ni(ac/ch)=TVS

o 35. All lakes and reservoirs tributary to Redwell Creek. Aq Life Cold 1 T=TVS(CL) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=1000(Trec) Se(ac/ch)=TVS Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Pb(ac)=TVS Ag(ac/ch)=TVS Agriculture D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac/ch)=TVS Pb(ch)=8 Zn(ac/ch)=TVS pH=6.5-9.0 CN=0.005 NO3=100 CrIII(ch)=TVS Mn(ac/ch)=TVS E.Coli=126/100ml CrIII(ch)=100(Trec) Hg(ch)=0.01(tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS Ni(ac/ch)=TVS

o 36. All lakes and reservoirs tributary to Gunnison River from its Aq Life Cold 1 T=TVS(CL) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Se(ac/ch)=TVS inception at the confluence of the Taylor and East Rivers, to the Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Ag(ac/ch)=TVS inlet of Blue Mesa Reservoir, excluding the listings in Segment 33. Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac/ch)=TVS Pb(ac/ch)=TVS Zn(ac/ch)=TVS This segment includes Kenny Moore Reservoir, Hot Springs Agriculture pH=6.5-9.0 CN=0.005 NO3=10 CrIII(ac)=50(Trec) Mn(ac/ch)=TVS Reservoir, Needle Creek Reservoir, Vouga Reservoir, Moss Lake, E.Coli=126/100ml Cl=250 CrIII(ch)=TVS Mn(ch)=WS(dis) Dome Lakes, and McDonough Reservoirs 1 and 2. SO4=WS CrVI(ac/ch)=TVS Hg(ch)=0.01(tot) Cu(ac/ch)=TVS Mo(ch)=160(Trec) Ni(ac/ch)=TVS

o 37. All lakes and reservoirs tributary to Blue Mesa Reservoir, Morrow Aq Life Cold 1 T=TVS(CL) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Se(ac/ch)=TVS Point Reservoir, Crystal Reservoir or the segments of the Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Ag(ac)=TVS Gunnison River that interconnect them, excluding the listings in Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ch)=TVS(tr) Segments 33 and 37. This segment includes Fish Creek Agriculture pH=6.5-9.0 CN=0.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS Reservoirs 1 and 2, Hampton Lake, High Park Lake, Watson E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Lake, Butte Lake, Swanson Lake, Fitzpatrick Lake, Dry Lake, SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) Devils Lake, Powderhorn Lakes, Soderquist Reservoir, Rainbow CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Lake, Cataract Lake, Castle Lakes, Crystal Lake, and Waterdog Cu(ac/ch)=TVS Ni(ac/ch)=TVS Lake.

o 38. Lake San Cristobal, Taylor Park Reservoir, Blue Mesa Reservoir, Aq Life Cold 1 T=TVS(CLL) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS Morrow Point Reservoir, Crystal Reservoir, and Silver Jack Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Reservoir. Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture pH=6.5-9.0 CN=0.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Zn(ac/ch)=TVS SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS

35.6(4) STREAM CLASSIFICATIONS and WATER QUALITY STANDARDS

REGION: 10 Desig Classifications NUMERIC STANDARDS TEMPORARY PHYSICAL MODIFICATIONS BASIN: North Fork of the Gunnison INORGANIC METALS and AND mg/l ug/l River BIOLOGICAL QUALIFIERS Stream Segment Description

o 1. All tributaries to North Fork of the Gunnison River, including all Aq Life Cold 1 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS wetlands, within the West Elk or Raggeds Wilderness Areas. Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS OW Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Zn(ac/ch)=TVS SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) Zn(ch)=TVS(sc) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS

o 2. Mainstem of North Fork of the Gunnison River from its inception at Aq Life Cold 1 T=TVS(CS-II) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS Temporary the confluence of Muddy Creek and Coal Creek to the Black Bridge Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Modification: (41.75 Drive) above Paonia. Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS Type B Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) As(ch)=current E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Zn(ac/ch)=TVS conditions(Trec) SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) Zn(ch)=TVS(sc) Expiration date CrVI(ac/ch)=TVS Mo(ch)=160(Trec) July 1, 2015 Cu(ac/ch)=TVS

o 3. Mainstem of North Fork of the Gunnison River from the Black Aq Life Cold 1 T=TVS(CS-II) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ag(ac)=TVS Bridge (41.75 Drive) above Paonia to the confluence with the Recreation P D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)= 0.02(Trec) Fe(ch)=1000(Trec) Ag(ch)=TVS(tr) Gunnison River. Oct. 1 to Mar. 31 D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Zn(ac/ch)=TVS Recreation E pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Apr. 1 to Sept. 30 Oct. 1 to March 31 Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Water Supply E.Coli=205/100ml SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) Agriculture April 1 to Sept. 30 CrVI(ac/ch)=TVS Mo(ch)=160(Trec) E.Coli=126/100ml Cu(ac/ch)=TVS Ni(ac/ch)=TVS Se(ac/ch)=TVS

o 4. Muddy Creek, including all tributaries and wetlands, from the Aq Life Cold 1 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Se(ac/ch)=TVS source to the confluence with Coal Creek. Coal Creek, including all Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Ag(ac)=TVS tributaries and wetlands, from the source to the confluence with Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ch)=TVS(tr) Muddy Creek. All tributaries to the North Fork of the Gunnison from Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS its inception at the confluence of Muddy Creek and Coal Creek to E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Zn(ch)=TVS(sc) the confluence with the Gunnison River within national forest SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) boundaries, except for the specific listing in Segment 1. CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS Ni(ac/ch)=TVS

o 5a. Mainstems of Hubbard Creek, Terror Creek, Minnesota Creek, and Aq Life Cold 1 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Se(ac/ch)=TVS Leroux Creek from the national forest boundary to their confluences Recreation P D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Ag(ac)=TVS with the North Fork of the Gunnison River; mainstem of Jay Creek Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ch)=TVS(tr) from its source to its confluence with the North Fork of the Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS Gunnison River. E.Coli=205/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Zn(ch)=TVS(sc) SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS Ni(ac/ch)=TVS

o 5b Mainstem of Roatcap Creek, including all tributaries and wetlands, Aq Life Cold 1 T=TVS(CS-II) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Se(ac/ch)=TVS from the source to the confluence with the North Fork of the Recreation P D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Ag(ac)=TVS Gunnison. Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ch)=TVS(tr) Agriculture pH=6.5-9.0 CN=0.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS E.Coli=205/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS Ni(ac/ch)=TVS

o 6a. All tributaries, including wetlands, to the North Fork of the Gunnison Aq Life Warm 2 T=TVS(WS-II) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=1000(Trec) Se(ac/ch)=TVS River from its inception at the confluence of Muddy Creek and Coal Recreation P D.O.=5.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=100(Trec) Pb(ac/ch)=TVS Ag(ac)=TVS Creek to the confluence with the Gunnison River, and not within Agriculture pH=6.5-9.0 Cl2(ch)=0.011 NO2=0.05 Cd(ac/ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS national forest boundaries, except for the specific listings in E.Coli=205/100ml CN=.005 NO3(ac)=100 CrIII(ac/ch)=TVS Hg(ch)=0.01(tot) Zn(ac/ch)=TVS Segments 5a, 5b, and 6b. CrIII(ch)=100(Trec) Mo(ch)=160(Trec) CrVI(ac/ch)=TVS Ni(ac/ch)=TVS Cu(ac/ch)=TVS

35.6(4) STREAM CLASSIFICATIONS and WATER QUALITY STANDARDS

o 6b. Mainstem and all tributaries to Bear Creek and Stevens Gulch. All Aq Life Warm 2 T=TVS(WS-III) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Se(ac/ch)=TVS Water+Fish Standards tributaries, including wetlands, to the North Fork of the Gunnison Recreation P D.O.=5.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Ag(ac)=TVS River that are north of the North Fork of the Gunnison River, from a Water Supply pH=6.5-9.0 Cl2(ch)=0.011 NO2=0.05 Cd(ac/ch)=TVS Pb(ac/ch)=TVS Ag(ch)=TVS point immediately above the confluence with Roatcap Creek to the Agriculture E.Coli=205/100ml CN=.005 NO3=10 CrIII(ac)=50(Trec) Mn(ac/ch)=TVS Zn(ac/ch)=TVS confluence with the Gunnison River, and are not within national Cl=250 CrIII(ch)=TVS Mn(ch)=WS(dis) forest boundaries; all tributaries, including wetlands, to the North SO4=WS CrVI(ac/ch)=TVS Hg(ch)=0.01(tot) Fork of the Gunnison River that are south of the North Fork of the Cu(ac/ch)=TVS Mo(ch)=160(Trec) Gunnison River, from a point immediately above the confluence with Ni(ac/ch)=TVS` Minnesota Creek to the confluence with the Gunnison River, and are not within national forest boundaries, excluding the specific listings in Segments 5a and 5b.

o 7. Paonia Reservoir and Overland Reservoir. Aq Life Cold 1 T=TVS(CLL) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Zn(ac/ch)=TVS SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS

o 8. All lakes and reservoirs that are tributary to the North Fork of the Aq Life Cold 1 T=TVS(CL) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Se(ac/ch)=TVS Gunnison River and within the West Elk or Raggeds Wilderness Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Ag(ac)=TVS areas. Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ch)=TVS(tr) Agriculture pH=6.5-9.0 CN=0.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Zn(ac)=TVS OW E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Zn(ch)=TVS SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS Ni(ac/ch)=TVS

o 9. All lakes and reservoirs tributary to Muddy Creek, Paonia Reservoir, Aq Life Cold 1 T=TVS(CL) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Se(ac/ch)=TVS or Coal Creek. All lakes and reservoirs tributary to the North Fork of Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Ag(ac)=TVS the Gunnison River from its inception at the confluence with Muddy Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ch)=TVS(tr) Creek and Coal Creek to the confluence with the Gunnison River, Agriculture pH=6.5-9.0 CN=0.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Zn(ac)=TVS and within national forest boundaries, excluding the specific listing E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Zn(ch)=TVS in Segments 7 and 8. This segment includes Island Lake, Aspen SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) Leaf Reservoir, Floating Lake, Tomahawk Reservoir, Dollar Lake, CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Lost Lake, Lost Lake Slough, Terror Creek Reservoir, Minnesota Cu(ac/ch)=TVS Ni(ac/ch)=TVS Reservoir, Beaver Reservoir, Lone Cabin Reservoir, Todd Reservoir, Holy Terror Reservoir (aka Eagle River Reservoir), Goodenough Reservoir, Dogfish Reservoir, Hilltop Reservoir, Willow Reservoir, Doughty Reservoir, Reynolds Reservoir, Hanson Reservoir, Bailey Reservoir, Owens Reservoir, Gray Reservoir, and Patterson Reservoirs.

o 10. All lakes and reservoirs tributary to Roatcap Creek and Jay Creek Aq Life Cold 1 T=TVS(CL) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Se(ac/ch)=TVS from their sources to their confluences with the North Fork of the Recreation P D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Ag(ac)=TVS Gunnison River. All lakes and reservoirs tributary to Hubbard Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ch)=TVS(tr) Creek, Terror Creek, Minnesota Creek, or Leroux Creek, and are Agriculture pH=6.5-9.0 CN=0.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS not within national forest boundaries. E.Coli=205/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS Ni(ac/ch)=TVS

o 11. All lakes and reservoirs tributary to the North Fork of the Gunnison Aq Life Warm 2 T=TVS(WL) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Se(ac/ch)=TVS River from its inception at the confluence of Muddy Creek and Coal UP Recreation P D.O.=5.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02-10 Fe(ch)=1000(Trec) Ag(ac)=TVS 1 Creek to the confluence with the Gunnison River, and not within Water Supply pH=6.5-9.0 Cl2(ch)=0.011 NO2=0.05 (Trec) Mn(ac/ch)=TVS Ag(ch)=TVS national forest boundaries, except for the specific listings in Agriculture E.Coli=205/100ml CN=0.005 NO3(ac)=10 Cd(ac/ch)=TVS Mn(ch)=WS(dis) Zn(ac/ch)=TVS Segments 7, 9, and 10. This segment includes Roeber Reservoir. Cl(ch)=250 CrIII(ac)=50(Trec) Hg(ch)=0.01(tot) SO4=WS CrIII(ch)=TVS Mo(ch)=160(Trec) CrVI(ac/ch)=TVS Ni(ac/ch)=TVS` Cu(ac/ch)=TVS

35.6(4) STREAM CLASSIFICATIONS and WATER QUALITY STANDARDS

REGION: 10 Desig Classifications NUMERIC STANDARDS TEMPORARY

PHYSICAL MODIFICATIONS INORGANIC METALS and AND BASIN: Uncompahgre River mg/l ug/l Stream Segment Description BIOLOGICAL QUALIFIERS

o 1. All tributaries to the Uncompahgre River, including all wetlands, Aq Life Cold 1 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS which are within the Mt. Sneffels or Uncompahgre Wilderness OW Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Areas. Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ch)=50 Ag(ch)=TVS(tr) E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ac/ch)=TVS Zn(ac/ch)=TVS SO4=WS CrIII(ch)=TVS Mn(ch)=WS(dis) CrVI(ac/ch)=TVS Hg(ch)=0.01(Tot) Cu(ac/ch)=TVS Mo(ch)=160(Trec)

o 2. Mainstem of the Uncompahgre River from the source Aq Life Cold 1 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS (Poughkeepsie Gulch) to a point immediately above the confluence Recreation P D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS with Red Mountain Creek. Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) E.Coli=205/100ml Cl=250 CrIII(ch)=50 (Trec) Mn(ch)=WS(dis) Zn(ac/ch)=TVS SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(Tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS

o 3a. Mainstem of the Uncompahgre River from a point immediately Aq Life Cold 1 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Cu(ac/ch)=TVS Ni(ac/ch)=TVS above the confluence with Red Mountain Creek to a point Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02 (Trec) Fe(ch)=WS(dis) Se(ac/ch)=TVS immediately above the confluence with Cascade Creek. Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Fe(ch)= 2296(Trec) Ag(ac)=TVS Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ch)=TVS(tr) E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ac/ch)=TVS Zn(ac/ch)=TVS SO4=WS CrIII(ch)=TVS Mn(ch)=WS(dis) CrVI(ac/ch)=TVS Hg(ch)=0.01(Tot) Mo(ch)=160(Trec)

3b. Mainstem of the Uncompahgre River from a point immediately Aq Life Cold 1 June-Oct 15 NH3(ac/ch)=TVS S=0.002 As(ac)=340 Cu(ac/ch)=TVS Ni(ac/ch)=TVS o above the confluence with Cascade Creek to a point immediately Recreation E T(DM)=21.7 C Cl2(ac)=0.019 B=0.75 As(ch)= 0.02(Trec) Fe(ch)=WS(dis) Se(ac/ch)=TVS o above the confluence with Dexter Creek. Water Supply T(MW AT)=17.0 C Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Fe(ch)= 4067(Trec) Ag(ac)=TVS Agriculture Oct 16-May CN=.005 NO3=10 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ch)=TVS(tr) o T(DM)=13.0 C Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Zn(ac/ch)=TVS o T(MW AT)=9.0 C SO4=WS CrIII(ch)=TVS Mn(ac/ch)=TVS D.O.=6.0 mg/l CrVI(ac/ch)=TVS Hg(ch)=0.01(Tot) D.O.(sp)=7.0 mg/l Mo(ch)=160(Trec) pH=6.5-9.0 E.Coli=126/100ml

o 3c. Mainstem of the Uncompahgre River from a point immediately Aq Life Cold 1 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Se(ac/ch)=TVS above the confluence with Dexter Creek to a point immediately Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=2682(Trec) Ag(ac)=TVS below the confluence with Dallas Creek. Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ch)=TVS(tr) Agriculture pH=6.5-9.0 CN=0.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(Tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS Ni(ac/ch)=TVS

o 3d. Mainstem of the Uncompahgre River from a point immediately Aq Life Cold 1 T=TVS(CS-II) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Se(ac/ch)=TVS below the confluence with Dallas Creek to the inlet of Ridgway Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=2053(Trec) Ag(ac)=TVS Reservoir. Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ch)=TVS(tr) Agriculture pH=6.5-9.0 CN=0.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(Tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS Ni(ac/ch)=TVS

o 3e. Mainstem of the Uncompahgre River from the outlet of Ridgway Aq Life Cold 1 T=TVS(CS-II) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Cu(ac/ch)=TVS Se(ac/ch)=TVS Reservoir to a point immediately above the outlet of the South Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=WS(dis) Ag(ac)=TVS Canal near Uncompahgre. Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Ag(ch)=TVS(tr) Agriculture pH=6.5-9.0 CN=0.005 NO3=10 Cd(ch)=TVS Pb(ac/ch)=TVS Zn(ac/ch)=TVS E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ac/ch)=TVS SO4=WS CrIII(ch)=TVS Mn(ch)=WS(dis) CrVI(ac/ch)=TVS Hg(ch)=0.01(Tot) Mo(ch)=160(Trec) Ni(ac/ch)=TVS

35.6(4) STREAM CLASSIFICATIONS and WATER QUALITY STANDARDS

REGION: 10 Desig Classifications NUMERIC STANDARDS TEMPORARY

PHYSICAL MODIFICATIONS INORGANIC METALS and AND BASIN: Uncompahgre River mg/l ug/l Stream Segment Description BIOLOGICAL QUALIFIERS

o 3f. Mainstem of the Uncompahgre River from a point immediately Aq Life Cold 1 T=TVS(CS-II) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Cu(ac/ch)=TVS Se(ac/ch)=TVS above the outlet of the South Canal to a point immediately above Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=WS(dis) Ag(ac)=TVS the Highway 90 bridge in Montrose. Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Ag(ch)=TVS(tr) Agriculture pH=6.5-9.0 CN=0.005 NO3=10 Cd(ch)=TVS Pb(ac/ch)=TVS Zn(ac/ch)=TVS E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ac/ch)=TVS SO4=WS CrIII(ch)=TVS Mn(ch)=WS(dis) CrVI(ac/ch)=TVS Hg(ch)=0.01(Tot) Mo(ch)=160(Trec) Ni(ac/ch)=TVS

o 4a. Mainstem of the Uncompahgre River from the Highway 90 bridge at Aq Life Warm 1 T=TVS(WS-II) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Se(ac/ch)=TVS Montrose to Gunnison Road. Recreation E D.O.=5.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)= 0.02(Trec) Fe(ch)= 1000(Trec) Ag(ac)=TVS Water Supply pH=6.5-9.0 Cl2(ch)=0.011 NO2=0.5 Cd(ac/ch)=TVS Pb(ac/ch)=TVS Ag(ch)=TVS Agriculture E.Coli=126/100ml CN=.005 NO3=10 CrIII(ac)=50(Trec) Mn(ac/ch)=TVS Zn(ac/ch)=TVS Cl=250 CrIII(ch)=TVS Mn(ch)=WS(dis) SO4=WS CrVI(ac/ch)=TVS Hg(ch)=0.01(Tot) Cu(ac/ch)=TVS Mo(ch)=160(Trec) Ni(ac/ch)=TVS

o 4b. Mainstem of the Uncompahgre River from Gunnison Road to the Aq Life Warm 2 T=TVS(WS-II) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Se(ac/ch)=TVS Temporary upstream boundary of Confluence Park. UP Recreation P D.O.=5.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)= 0.02(Trec) Fe(ch)= 1800 (Trec) Ag(ac)=TVS Modification: Water Supply pH=6.5-9.0 Cl2(ch)=0.011 NO2=0.5 Cd(ac/ch)=TVS Pb(ac/ch)=TVS Ag(ch)=TVS Type A Agriculture E.Coli=205/100ml CN=.005 NO3=10 CrIII(ac)=50(Trec) Mn(ac/ch)=TVS Zn(ac/ch)=TVS Se(ch)= current Cl=250 CrIII(ch)=TVS Mn(ch)=WS(dis) conditions SO4=WS CrVI(ac/ch)=TVS Hg(ch)=0.01(Tot) Expiration date of Cu(ac/ch)=TVS Mo(ch)=160(Trec) Dec. 31, 2017 Ni(ac/ch)=TVS

o 4c. Mainstem of the Uncompahgre River from the upstream boundary Aq Life Warm 1 T=TVS(WS-II) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)= 2356(Trec) Se(ac/ch)=TVS of Confluence Park to the confluence with the Gunnison River. Recreation E D.O.=5.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)= 7.6(Trec) Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture pH=6.5-9.0 Cl2(ch)=0.011 NO2=0.5 Cd(ac/ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS E.Coli=126/100ml CN=.005 NO3=100 CrIII(ac/ch)=TVS Hg(ch)=0.01(Tot) Zn(ac/ch)=TVS CrIII(ch)=100(Trec) Mo(ch)=160(Trec) CrVI(ac/ch)=TVS Ni(ac/ch)=TVS Cu(ac/ch)=TVS

o 5. All tributaries to the Uncompahgre River, including all wetlands, Aq Life Cold 2 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS from the source to a point immediately below the confluence with Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02- Fe(ch)=1000(Trec) Se(ac/ch)=TVS 1 Dexter Creek, except for specific listings in Segments 1, 6a, 6b, and Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 10(Trec) Pb(ac/ch)=TVS Ag(ac)=TVS 7 through 9. Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ac)=TVS(tr) Mn(ac/ch)=TVS Ag(ch)=TVS(tr) E.Coli=126/100ml Cl=250 Cd(ch)=TVS Mn(ch)=WS(dis) Zn(ac/ch)=TVS SO4=WS CrIII(ac)=50(Trec) Hg(ch)=0.01(Tot) CrIII(ch)=TVS Mo(ch)=160(Trec) CrVI(ac/ch)=TVS Cu(ac/ch)=TVS

o 6a. Mainstem of Red Mountain Creek from the source to immediately Aq Life Cold 2 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=1000(Trec) Se(ac/ch)=TVS above the confluence with the East Fork of Red Mountain Creek. Recreation N D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)= 100(Trec) Pb(ac/ch)=TVS Ag(ac/ch)=TVS Agriculture D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS pH=6.5-9.0 CN=.005 NO3=100 CrIII(ac/ch)=TVS Hg(ch)=0.01(Tot) E.Coli=630/100ml CrIII(ch)=100(Trec) Mo(ch)=160(Trec) CrVI(ac/ch)=TVS Ni(ac/ch)=TVS Cu(ac/ch)=TVS

6b. Mainstem of Red Mountain Creek from immediately above the UP Recreation N D.O. = 3.0 mg/l confluence with the East Fork of Red Mountain Creek to the Agriculture pH = ambient confluence with the Uncompahgre River. All tributaries to Red E.Coli=630/100ml Mountain Creek within Corkscrew and Champion basins.

o 7. Mainstem of Gray Copper Gulch from the source to the confluence Aq Life Cold 2 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS 1 with Red Mountain Creek. Recreation P D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02-10(Trec) Fe(ch)= 2700(Trec) Se(ac/ch)=TVS Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ch)=655 Ag(ch)=TVS(tr) E.Coli=205/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ac/ch)=TVS Zn(ac/ch)=TVS SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(Tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS

35.6(4) STREAM CLASSIFICATIONS and WATER QUALITY STANDARDS

REGION: 10 Desig Classifications NUMERIC STANDARDS TEMPORARY

PHYSICAL MODIFICATIONS INORGANIC METALS and AND BASIN: Uncompahgre River mg/l ug/l Stream Segment Description BIOLOGICAL QUALIFIERS

o 8. Mainstem of Mineral Creek from the source to the confluence with Aq Life Cold 2 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Se(ac/ch)= TVS 1 the Uncompahgre River. Recreation P D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02-10(Trec) Fe(ch)=1000 (Trec) Ag(ac)=TVS Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ch)=4 Ag(ch)= TVS(tr) Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)= TVS Mn(ac/ch)=TVS Zn(ac/ch)= TVS E.Coli=205/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(Tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ch)=5 Ni(ac/ch)=TVS

o 9 Mainstem of Imogene Creek from its source to its confluence with Aq Life Cold 2 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=1000 (Trec) Se(ac/ch)=TVS Fish Ingestion Sneffels Creek. Mainstem and all tributaries of Sneffels Creek Recreation P D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=7.6(Trec) Pb(ac/ch)=TVS Ag(ac)=TVS from a point 1.5 miles above its confluence with Imogene Creek at Agriculture D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Mn(ac/ch)=TVS Ag(ch)=TVS(tr) 37.974979, -107.753960 (WGS84) to its confluence with Imogene pH=6.5-9.0 CN=.005 NO3=100 Cd(ch)=TVS Hg(ch)=0.01(Tot) Zn(ac/ch)=TVS Creek. Mainstem of Canyon Creek from its inception at the E.Coli=205/100ml CrIII(ac/ch)=TVS Mo(ch)=160(Trec) confluence of Imogene Creek and Sneffles Creek to the confluence CrIII(ch)=100(Trec) Ni(ac/ch)=TVS with the Uncompahgre River. CrVI(ac/ch)=TVS Cu(ac/ch)=TVS

o 10. All tributaries to the Uncompahgre River, including all wetlands, Aq Life Cold 1 T=TVS(CS-II) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS from a point immediately below the confluence with Dexter Creek Recreation P D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000 (Trec) Se(ac/ch)=TVS to the South Canal near Uncompahgre, except for specific listings Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS in Segments 1 and 11. Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ch)=WS(dis) Ag(ch)=TVS(tr) E.Coli=205/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ac/ch)=TVS Zn(ac/ch)=TVS SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(Tot) Zn(ch)=TVS(sc) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS

o 11. Mainstem of Coal Creek from the source to the Park Ditch, Aq Life Cold 1 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS mainstem of Dallas Creek from the source of the East and West Recreation P D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Forks to the confluence with the Uncompahgre River; mainstem of Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS Cow Creek, including all tributaries, from the Uncompahgre Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) Wilderness Area boundary to the confluence with the E.Coli=205/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Zn(ac/ch)=TVS Uncompahgre River; mainstems of Billy Creek, Onion Creek and SO4=WS CrIII(ch)=TVS Hg(ch)=0.01 (Tot) Beaton Creek from their sources to their confluences with CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Uncompahgre River; mainstem of Beaver Creek from the source to Cu(ac/ch)=TVS the confluence with the East Fork of Dallas Creek; and mainstem of Pleasant Valley Creek from the source to the confluence with Dallas Creek.

o 12. All tributaries to the Uncompahgre River, including all wetlands, Aq Life Warm 1 T=TVS(WS-II) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=1400(Trec) Se(ac/ch)=TVS from the South Canal near Uncompahgre to the confluence with UP Recreation P D.O.=5.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)= 7.6(Trec) Pb(ac/ch)=TVS Ag(ac/ch)=TVS the Gunnison River, except for specific listings in Segments 13, 14, Agriculture pH=6.5-9.0 Cl2(ch)=0.011 NO2=0.05 Cd(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS 15a and 15b. E.Coli=205/100ml CN=.005 NO3=100 CrIII(ac/ch)=TVS Hg(ch)=0.01(Tot) Cr(ch)=100(Trec) Mo(ch)=160(Trec) CrVI(ac/ch)=TVS Ni(ac/ch)=TVS Cu(ac/ch)=TVS

o 13. Mainstem of East Fork Dry Creek, Pryor Creek and West Fork Dry Aq Life Cold 1 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=1000(Trec) Ag(ac)=TVS Creek from their sources to their confluence; mainstem of Spring Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=7.6(Trec) Pb(ac/ch)=TVS Ag(ch)=TVS(tr) Creek, West Fork Spring Creek and Middle Spring Creek from the Agriculture D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Mn(ac/ch)=TVS Zn(ac/ch)=TVS source to Popular Road at the mouth of Spring Canyon, and pH=6.5-9.0 CN=.005 NO3=100 Cd(ch)=TVS Hg(ch)=0.01(Tot) mainstem of Mexican Gulch from the source to the Section line E.Coli=126/100ml CrIII(ac/ch)=TVS Mo(ch)=160(Trec) dividing Section 19 and 30, T49N, R9W. CrIII(ch)=100(Trec) Ni(ac/ch)=TVS CrVI(ac/ch)=TVS Se(ac/ch)=TVS Cu(ac/ch)=TVS

o 14. East and West Forks of Horsefly Creek, including all tributaries and Aq Life Cold 2 T=TVS(CS-II) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=1000(Trec) Se(ac/ch)=TVS wetlands, from their sources to a point immediately above their Recreation P D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=100(Trec) Pb(ac/ch)=TVS Ag(ac)=TVS confluence. Happy Canyon Creek, including all tributaries and Agriculture D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.5 Cd(ac)=TVS(tr) Mn(ac/ch)=TVS Ag(ch)=TVS(tr) wetlands, from the source to the most downstream national forest pH=6.5-9.0 CN=.005 NO3=100 Cd(ch)=TVS Hg(ch)=0.01(Tot) Zn(ac/ch)=TVS boundary. E.Coli=206/100ml CrIII(ac/ch)=TVS Mo(ch)=160(Trec) CrIII(ch)=100(Trec) Ni(ac/ch)=TVS CrVI(ac/ch)=TVS Cu(ac/ch)=TVS

o 15a. Mainstem of Happy Canyon from a point immediately below the Aq Life Warm 1 T=TVS(WS-II) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=1000(Trec) Se(ac/ch)=TVS West Canal to the confluence with the Uncompahgre River; Recreation P D.O.=5.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)= 7.6(Trec) Pb(ac/ch)=TVS Ag(ac)=TVS mainstem of Horsefly Creek from a point immediately below the Agriculture pH=6.5-9.0 Cl2(ch)=0.011 NO2=0.5 Cd(ac/ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS confluence with Wildcat Canyon to the confluence with the E.Coli=205/100ml CN=.005 NO3=100 CrIII(ac/ch)=TVS Hg(ch)=0.01(Tot) Zn(ac/ch)=TVS Uncompahgre River. CrIII(ch)=100(Trec) Mo(ch)=160(Trec) CrVI(ac/ch)=TVS Ni(ac/ch)=TVS Cu(ac/ch)=TVS

35.6(4) STREAM CLASSIFICATIONS and WATER QUALITY STANDARDS

REGION: 10 Desig Classifications NUMERIC STANDARDS TEMPORARY

PHYSICAL MODIFICATIONS INORGANIC METALS and AND BASIN: Uncompahgre River mg/l ug/l Stream Segment Description BIOLOGICAL QUALIFIERS

o 15b. Mainstem of Dry Creek from the confluence of the East and West Aq Life Cold 2 T=TVS(CS-II) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=1000(Trec) Se(ac/ch)=TVS Forks to immediately above the confluence with Coalbank Recreation E D.O.= 6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=100(Trec) Pb(ac/ch)=TVS Ag(ac)=TVS Canyon Creek. Agriculture D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.5 Cd(ac)=TVS(tr) Mn(ac/ch)=TVS Ag(ch)=TVS(tr) pH=6.5-9.0 CN=.005 Cd(ch)=TVS Hg(ch)=0.01(Tot) Zn(ac/ch)=TVS NO3=100 E.Coli=126/100ml CrIII(ac/ch)=TVS Mo(ch)=160(Trec) CrIII(ch)=100(Trec) Ni(ac/ch)=TVS CrVI(ac/ch)=TVS Cu(ac/ch)=TVS

o 16. All lakes and reservoirs tributary to the Uncompahgre River and Aq Life Cold 1 T=TVS(CL) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Se(ac/ch)=TVS within the Mt. Sneffels or Uncompahgre Wilderness Areas. OW Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Ag(ac)=TVS Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ch)=TVS(tr) Agriculture pH=6.5-9.0 CN=0.005 NO3=10 Cd(ch)=TVS Mn(ch)=50 Zn(ac/ch)=TVS E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ac/ch)=TVS SO4=WS CrIII(ch)=TVS Mn(ch)=WS(dis) CrVI(ac/ch)=TVS Hg(ch)=0.01(Tot) Cu(ac/ch)=TVS Mo(ch)=160(Trec) Ni(ac/ch)=TVS

o 17. All lakes and reservoirs tributary to the Uncompahgre River from Aq Life Cold 1 T=TVS(CL) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Se(ac/ch)=TVS 1 the source to a point immediately below the confluence with Dexter Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02-10(Trec) Fe(ch)=1000(Trec) Ag(ac)=TVS Creek, except for specific listings in Segments 16. This segment Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ch)=TVS(tr) includes Lake Como, Ptarmigan Lake, Crystal Lake, and Lake Agriculture pH=6.5-9.0 CN=0.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Zn(ac)=TVS Lenore. E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(Tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS Ni(ac/ch)=TVS

o 18. All lakes and reservoirs tributary to the Uncompahgre River from a Aq Life Cold 1 T=TVS(CL) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Se(ac/ch)=TVS point immediately below the confluence with Dexter Creek to a Recreation P D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000 (Trec) Ag(ac)=TVS point immediately below the South Canal near Uncompahgre, Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ch)=TVS(tr) excluding the listings in Segment 16 and 19. All lakes and Agriculture pH=6.5-9.0 CN=0.005 NO3=10 Cd(ch)=TVS Mn(ch)=WS(dis) Zn(ac/ch)=TVS reservoirs tributary to the East Fork of Dry Creek or the West Fork E.Coli=205/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ac/ch)=TVS of Dry Creek from their sources to their confluence. This segment SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(Tot) includes Black Lake, Blue Lakes, Ulah Brown Spring, Lake CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Otonawanda, West Lake, Dry Lake, Elephant Reservoir, Buckhorn Cu(ac/ch)=TVS Ni(ac/ch)=TVS Lakes, Silesca Pond and Olathe Reservoirs 1 and 2.

o 19. Ridgway Reservoir. Aq Life Cold 1 T=TVS(CLL) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Cu(ac/ch)=TVS Se(ac/ch)=TVS Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=7.6(Trec) Fe(ch)=1000(Trec) Ag(ac)=TVS Agriculture D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ch)=TVS(tr) pH=6.5-9.0 CN=0.005 NO3=100 Cd(ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS E.Coli=126/100ml CrIII(ac/ch)=TVS Hg(ch)=0.01(Tot) CrIII(ch)=100(Trec) Mo(ch)=160(Trec) CrVI(ac/ch)=TVS Ni(ac/ch)=TVS

o 20. Sweitzer Lake (a.k.a. Garnet Mesa Reservoir). Aq Life Warm 1 T=TVS(WL) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=1000(Trec) Se(ac/ch)=TVS Recreation E D.O.=5.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=7.6 (Trec) Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture pH=6.5-9.0 Cl2(ch)=0.011 NO2=0.5 Cd(ac/ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS E.Coli=126/100ml CN=0.005 NO3=100 CrIII(ac/ch)=TVS Hg(ch)=0.01(Tot) Zn(ac/ch)=TVS CrIII(ch)=100(Trec) Mo(ch)=160(Trec) CrVI(ac/ch)=TVS Ni(ac/ch)=TVS Cu(ac/ch)=TVS

o 21. All lakes and reservoirs tributary to the Uncompahgre River from a Aq Life Warm 2 T=TVS(WL) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=1000 (Trec) Se(ac/ch)=TVS point immediately below the South Canal near Uncompahgre to the UP Recreation P D.O.=5.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=100(Trec) Pb(ac/ch)=TVS Ag(ac/ch)=TVS confluence with the Gunnison River, excluding the listings in Agriculture pH=6.5-9.0 Cl2(ch)=0.011 NO2=0.05 Cd(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS Segments 20 and 18. E.Coli=205/100ml CN=0.005 NO3=100 CrIII(ac/ch)=TVS Hg(ch)=0.01(Tot) CrIII(ch)=100(Trec) Mo(ch)=160(Trec) CrVI(ac/ch)=TVS Ni(ac/ch)=TVS Cu(ac/ch)=TVS

35.6(4) STREAM CLASSIFICATIONS and WATER QUALITY STANDARDS

REGION: 10 Desig Classifications NUMERIC STANDARDS TEMPORARY

PHYSICAL MODIFICATIONS INORGANIC METALS and AND BASIN: Lower Gunnison River mg/l ug/l Stream Segment Description BIOLOGICAL QUALIFIERS

o Aq Life Cold 1 T=TVS(CS-II) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS 1. Mainstem of the Gunnison River from the outlet of Crystal Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Reservoir to a point immediately above the confluence with the Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS Uncompahgre River. Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Zn(ac/ch)=TVS SO4=WS CrIII(ch)=TVS Mo(ch)=160(Trec) Zn(ch)=TVS(sc) CrVI(ac/ch)=TVS Hg(ch)=0.01(Tot) Cu(ac/ch)=TVS

o 2. Mainstem of the Gunnison River from a point immediately above the Aq Life Warm 1 T=TVS(WS-II) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Hg(ch)=0.01(Tot) Temporary confluence with the Uncompahgre River to the confluence with the Recreation E D.O.=5.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Mo(ch)=160(Trec) Modification: Colorado River. Water Supply pH=6.5-9.0 Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ni(ac/ch)=TVS Type A Agriculture E.Coli=126/100ml CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Se(ac/ch)=TVS Se(ch)= current Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Ag(ac)=TVS conditions SO4=480 CrIII(ch)=TVS Ag(ch)=TVS(tr) Expiration date of CrVI(ac/ch)=TVS Zn(ac/ch)=TVS Dec. 31, 2017 Cu(ac/ch)=TVS

o 3. All tributaries to the Gunnison River, including all wetlands, which Aq Life Cold 1 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS are within national forest boundaries, from the outlet of Crystal Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Reservoir to the confluence with the Colorado River, except for Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS specific listings in the North Fork Gunnison River sub-basin, Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) Uncompahgre River sub-basins, and segments 10, 11a, 11b, and E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Zn(ac/ch)=TVS 12. SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(Tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS

o 4a. All tributaries to the Gunnison River, including all wetlands which Aq Life Warm 2 T=TVS(WS-II) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS are not within national forest boundaries, from the outlet of Crystal UP Recreation P D.O.=5.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02- Fe(ch)=1000(Trec) Se(ac/ch)=TVS 1 Reservoir to the confluence with the Colorado River, except for Water Supply pH=6.5-9.0 Cl2(ch)=0.011 NO2=0.5 10(Trec) Pb(ac/ch)=TVS Ag(ac)=TVS specific listings in the North Fork of the Gunnison River sub-basin, Agriculture E.Coli=205/100ml CN=.005 NO3=10 Cd(ac/ch)=TVS Mn(ch)=WS(dis) Ag(ch)=TVS the Uncompahgre River sub-basin, and in Segments 3, 4b, 4c, 5 Cl=250 CrIII(ac)=50(Trec) Mn(ac/ch)=TVS Zn(ac/ch)=TVS through 10, 12 and 13. SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(Tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS

o 4b. All tributaries to Reeder, Hollenbeck, and Juniata Reservoirs, and Aq Life Warm 2 T=TVS(WS-II) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS the mainstem of Kannah Creek below the point of diversion for Recreation E D.O.=5.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02- Fe(ch)=1000(Trec) Se(ac/ch)=TVS 1 public water supply. Water Supply pH=6.5-9.0 Cl2(ch)=0.011 NO2=0.5 10(Trec) Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture E.Coli=126/100ml CN=.005 NO3=10 Cd(ac/ch)=TVS Mn(ch)=WS(dis) Ag(ch)=TVS Cl=250 CrIII(ac)=50(Trec) Mn(ac/ch)=TVS Zn(ac/ch)=TVS SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(Tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS

o 4c. Mainstem of Red Rock Creek from the boundary of Black Canyon of Aq Life Warm 2 T=TVS(WS-III) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS the Gunnison National Park to the confluence of the Gunnison Recreation E D.O.=5.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02- Fe(ch)=1000(Trec) Se(ac/ch)=TVS 1 River. Water Supply pH=6.5-9.0 Cl2(ch)=0.011 NO2=0.5 10(Trec) Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture E.Coli=126/100ml CN=.005 NO3=10 Cd(ac/ch)=TVS Mn(ch)=WS(dis) Ag(ch)=TVS Cl=250 CrIII(ac)=50(Trec) Mn(ac/ch)=TVS Zn(ac/ch)=TVS SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(Tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS

o 5. Mainstem of Roubideau Creek from the national forest boundary to Aq Life Cold 1 T=TVS(CS-II) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS the confluence with Potter Creek; mainstem of Monitor Creek from Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS the national forest boundary to the confluence with Potter Creek; Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS mainstem of North Fork Escalante Creek from the national forest Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) boundary to the confluence with Escalante Creek. E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) U(ac)=TVS SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(Tot) U(ch)=16.8- CrVI(ac/ch)=TVS Mo(ch)=160(Trec) 301(Trec) Cu(ac/ch)=TVS Zn(ac/ch)=TVS

o 6. Mainstem of Roubideau Creek from Potter Creek to the Gunnison Aq Life Cold 1 T=TVS(CS-II) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Cu(ac/ch)=TVS Ni(ac/ch)=TVS River; mainstem of Escalante Creek from the national forest Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=7.6(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS boundary to the Gunnison River; mainstem of Little Dominguez Agriculture D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS from the national forest boundary to Big Dominguez Creek; pH=6.5-9.0 CN=.005 NO3=100 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) mainstem of Big Dominguez from the national forest boundary to E.Coli=126/100ml CrIII(ac/ch)=TVS Hg(ch)=0.01(Tot) U(ac) =TVS the Gunnison River, mainstem of East Creek from the source to the CrIII(ch)=100(Trec) Mo(ch)=160(Trec) U(ch)=16.8- Gunnison River. CrVI(ac/ch)=TVS 301(Trec) Zn(ac/ch)=TVS

35.6(4) STREAM CLASSIFICATIONS and WATER QUALITY STANDARDS

REGION: 10 Desig Classifications NUMERIC STANDARDS TEMPORARY

PHYSICAL MODIFICATIONS INORGANIC METALS and AND BASIN: Lower Gunnison River mg/l ug/l Stream Segment Description BIOLOGICAL QUALIFIERS

o 7a. Mainstem of Ward Creek, from the national forest boundary to the Aq Life Cold 2 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS confluence with Dirty George Creek. Recreation P D.O. =6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02- Fe(ch)=1000(Trec) Se(ac/ch)=TVS 1 Water Supply S.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 10(Trec) Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture pH=6.5-9.0 CN=0.005 NO3=10 Cd(ac)=TVS(tr) Mn(ac/ch)=TVS Ag(ch)=TVS(tr) E.Coli=205/100ml Cl=250 Cd(ch)=TVS Mn(ch)=WS(dis) Zn(ac/ch)=TVS SO4=WS CrIII(ac)=50(Trec) Hg(ch)=0.01(Tot) CrIII(ch)=TVS Mo(ch)=160(Trec) CrVI(ac/ch)=TVS Cu(ac/ch)=TVS

o 7b. Mainstem of Surface Creek from the point of diversion of water Aq Life Cold 1 T=TVS(CS-II) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS supply to the confluence with Tongue Creek; mainstem of Tongue Recreation P D.O. = 6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)= 0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Creek from its inception at the confluence of Ward Creek and Dirty Water Supply S.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS George Creek to the confluence with the Gunnison River; Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) mainstem of Youngs Creek from the national forest boundary to E.Coli=205/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Zn(ac/ch)=TVS the confluence with Kiser Creek; mainstem of Kiser Creek from the SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(Tot) Zn(ch)=TVS(sc) national forest boundary to the confluence with Youngs Creek. CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS

o 8. Mainstem of Surface Creek and Kannah Creek, including all Aq Life Cold 1 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Hg(ch)=0.01(Tot) tributaries, from the national forest boundary to the point of Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Mo(ch)=160(Trec) diversion for public water supply. Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ni(ac/ch)=TVS Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Se(ac/ch)=TVS E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Ag(ac)=TVS SO4=WS CrIII(ch)=TVS Mn(ch)=1000 Ag(ch)=TVS(tr) CrVI(ac/ch)=TVS Zn(ac/ch)=TVS Cu(ac/ch)=TVS Zn(ch)=TVS(sc)

o 9. Fruitgrowers Reservoir. Aq Life Warm 2 T=TVS(WL) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=1000(Trec) Se(ac/ch)=TVS UP Agriculture D.O.=5.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=100(Trec) Pb(ac/ch)=TVS Ag(ac)=TVS April 1 to Oct. 31 pH=6.5-9.0 Cl2(ch)=0.011 NO2=0.05 Cd(ac/ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS Recreation E April 1 to Oct. 31 CN=.005 NO3=100 CrIII(ac/ch)=TVS Hg(ch)=0.01(Tot) Zn(ac/ch)=TVS Nov. 1 to March E.Coli=126/100ml CrIII(ch)=100(Trec) Mo(ch)=160(Trec) 31 Recreation P Nov. 1 to March 31 CrVI(ac/ch)=TVS Ni(ac/ch)=TVS E.Coli=205/100ml Cu(ac/ch)=TVS

o 10. Mainstem of the Smith Fork from the confluence of the North Smith T=TVS(CS-II) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ag(ac)=TVS Fork and South Smith Fork to the confluence with the Gunnison Aq Life Cold 1 D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)= 0.02(Trec) Fe(ch)=1000(Trec) Ag(ch)=TVS(tr) River. Recreation E D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Zn(ac/ch)=TVS Water Supply pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Zn(ch)=TVS(sc) Agriculture E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(Tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS Ni(ac/ch)=TVS Se(ac/ch)=TVS

o 11a. All tributaries to the Smith Fork, including all wetlands, which are Aq Life Cold 1 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS within national forest boundaries except for specific listings in Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Segment 11b; Doug Creek from the source to the confluence with Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS Muddy Creek. Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Zn(ac/ch)=TVS SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(Tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS

o 11b. All tributaries to the Smith Fork, including all wetlands, which are Aq Life Cold 1 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS within the West Elk Wilderness Area. OW Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Zn(ac/ch)=TVS SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(Tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS

35.6(4) STREAM CLASSIFICATIONS and WATER QUALITY STANDARDS

REGION: 10 Desig Classifications NUMERIC STANDARDS TEMPORARY

PHYSICAL MODIFICATIONS INORGANIC METALS and AND BASIN: Lower Gunnison River mg/l ug/l Stream Segment Description BIOLOGICAL QUALIFIERS

o 12. All tributaries to the Smith Fork, including all wetlands, which are Aq Life Warm 2 T=TVS(WS-III) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) not within national forest boundaries, except for the specific listing Recreation P D.O. = 5.0 mg/l Cl2(ac)=0.019 As(ch)= 0.02- Fe(ch)=1000(Trec) Se(ac/ch)= TVS B(ch)=0.75 1 in Segment 11a. Water Supply pH=6.5-9.0 Cl2(ch)=0.011 NO2=0.05 10(Trec) Pb(ac/ch)= TVS Ag(ac/ch)=TVS Agriculture E.Coli=205/100ml CN=0.005 NO3=10 Cd(ac/ch)= TVS Mn(ac/ch)= TVS Zn(ac/ch)= TVS Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(Tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS Ni(ac/ch)=TVS

o 13. Crawford Reservoir. Aq Life Warm 1 T=TVS(WL) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=1000(Trec) Ag(ac/ch)=TVS Recreation E D.O.= 5.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=7.6(Trec) Pb(ac/ch)=TVS Zn(ac/ch)=TVS Agriculture pH=6.5-9.0 Cl2(ch)=0.011 NO2=0.05 Cd(ac/ch)=TVS Mn(ac/ch)=TVS E.Coli=126/100ml CN=.005 NO3=100 CrIII(ac/ch)=TVS Hg(ch)=0.01(Tot) CrIII(ch)=100(Trec) Mo(ch)=160(Trec) CrVI(ac/ch)=TVS Ni(ac/ch)=TVS Cu(ac/ch)=TVS Se(ac/ch)=TVS

o 14. All lakes and reservoirs tributary to the Gunnison River, from the Aq Life Cold 1 T=TVS(CL) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS outlet of Crystal Reservoir to the confluence with the Colorado Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS River, and within national forest boundaries, excluding listings in the Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS North Fork of the Gunnison River sub-basin, the Uncompahgre Agriculture pH=6.4-9.0 CN=0.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) River sub-basin, and Segments 15, 17 and 18. This segment E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Zn(ac/ch)=TVS includes Trickle Reservoir, Hale Reservoir, Marcott Park Reservoir, SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(Tot) Cherry Lane Reservoir, Cole Reservoirs, Cedar Mesa Reservoir, CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Kehmeier Reservoir, Weir and Johnson Reservoir, Bonita Cu(ac/ch)=TVS Reservoir, Blanche Park Reservoir, Vela Reservoir, Knox Reservoir, Military Park Reservoir, Eureka Park Reservoir, Carbonate Park Reservoirs, Prebble Reservoir, Youngs Creek Reservoirs, Kiser Reservoir, Donnely Reservoir, Kiser Slough Reservoir, Baron Lake, Upper Eggleston Lake, Upper Hotel Lake, Hotel Lake, Arch Slough, Alexander Lake, Deep Ward Lake, Kennicott Slough Reservoir, Womack Reservoirs, Deep Slough Reservoir, Scotland Peak Reservoir, Boulder Lake Reservoir, Basin Reservoir 1, Clear Lake, Granby Reservoirs, Dugger Reservoir, Carson Lake, Crane Lake, Flowing Park, Blue Lake, Chambers Reservoir, Scales Lakes, Grand Mesa Reservoirs, Anderson Reservoirs, Bolen Reservoir, Bolen-Anderson-Jacobs Reservoir 2, Hollenbeck Reservoir 2, Cliff Lake Reservoir, Lee Reservoirs, Lone Pine Reservoirs, Bullfrog Reservoir, Twin Lake, Harry White Reservoirs, Beaver Dam Reservoir, and Fruita Reservoirs 1 and 2.

o 15. Island Lake, Eggleston Lake, and Trickle Park Reservoir (aka Park Aq Life Cold 1 T=TVS(CLL) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Se(ac/ch)=TVS Reservoir). Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Ag(ac)=TVS Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ch)=TVS(tr) Agriculture pH=6.4-9.0 CN=0.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(Tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS Ni(ac/ch)=TVS

o 16. All lakes and reservoirs that are tributary to the Gunnison River, Aq Life Warm 1 T=TVS(WL) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Se(ac/ch)=TVS from the outlet of Crystal Reservoir to the confluence with the Recreation E D.O.=5.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Ag(ac/ch)=TVS Colorado River, and not within national forest boundaries, excluding Water Supply pH=6.5-9.0 Cl2(ch)=0.011 NO2=0.5 Cd(ac/ch)=TVS Pb(ac/ch)=TVS Zn(ac/ch)=TVS the listings in the North Fork of the Gunnison sub-basin, the Agriculture E.Coli=126/100ml CN=0.005 NO3=10 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Uncompahgre River sub-basin, and Segments 9, 13, and 19. This Cl=250 CrIII(ch)=TVS Mn(ac/ch)=TVS segment includes Poison Springs Reservoir, Dry Fork Reservoir, SO4=WS CrVI(ac/ch)=TVS Hg(ch)=0.01(Tot) Delta Reservoir, Winkler Reservoir, Desert Reservoir, Alkali Cu(ac/ch)=TVS Mo(ch)=160(Trec) Reservoir, Cheney Reservoir, Juniata Reservoir, Hallenbeck Ni(ac/ch)=TVS Reservoir, Reeder Reservoir, Enochs Lake, Gobbo Reservoir, Schrader Reservoir, and King Reservoir.

o 17. All lakes and reservoirs tributary to the Smith Fork, and within Aq Life Cold 1 T=TVS(CL) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Se(ac/ch)=TVS national forest boundaries excluding the listings in Segment 18. All Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Ag(ac)=TVS lakes and reservoirs tributary to Doug Creek. Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ch)=TVS(tr) Agriculture pH=6.5-9.0 CN=0.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(Tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS Ni(ac/ch)=TVS

35.6(4) STREAM CLASSIFICATIONS and WATER QUALITY STANDARDS

REGION: 10 Desig Classifications NUMERIC STANDARDS TEMPORARY

PHYSICAL MODIFICATIONS INORGANIC METALS and AND BASIN: Lower Gunnison River mg/l ug/l Stream Segment Description BIOLOGICAL QUALIFIERS

o 18. All lakes and reservoirs tributary to the Smith Fork, and are within Aq Life Cold 1 T=TVS(CL) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Se(ac/ch)=TVS the West Elk Wilderness Area. OW Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Ag(ac)=TVS Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ch)=TVS(tr) Agriculture pH=6.5-9.0 CN=0.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(Tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS Ni(ac/ch)=TVS

o 19. All lakes and reservoirs tributary to the Smith Fork, which are not Aq Life Warm 2 T=TVS(WL) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Se(ac/ch)=TVS within national forest boundaries, excluding the listings in Segment Recreation P D.O. = 5.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Ag(ac)=TVS 17. This segment includes Gould Reservoir. Water Supply pH=6.5-9.0 Cl2(ch)=0.011 NO2=0.5 Cd(ac/ch)=TVS Pb(ac/ch)=TVS Ag(ch)=TVS Agriculture E.Coli=205/100ml CN=0.005 NO3=10 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Zn(ac/ch)=TVS Cl=250 CrIII(ch)=TVS Mn(ac/ch)=TVS SO4=WS CrVI(ac/ch)=TVS Hg(ch)=0.01(Tot) Cu(ac/ch)=TVS Mo(ch)=160(Trec) Ni(ac/ch)=TVS

35.6(4) STREAM CLASSIFICATIONS and WATER QUALITY STANDARDS

REGION: 10 Desig Classifications NUMERIC STANDARDS TEMPORARY

PHYSICAL MODIFICATIONS INORGANIC METALS and AND BASIN: San Miguel River mg/l ug/l Stream Segment Description BIOLOGICAL QUALIFIERS

o 1. All tributaries, including wetlands, to the San Miguel River, and OW Aq Life Cold 1 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS within the boundaries of the Lizard Head, or Mount Sneffels Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Wilderness Areas. Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Zn(ac/ch)=TVS SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) Zn(ch)=TVS(sc) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS

o 2. All tributaries, including all wetlands, to the San Miguel River from Aq Life Cold 1 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS its sources to a point immediately below the confluence of Leopard Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Creek, with the exceptions listed in Segments 1, 6a, 6b, 7 and 8. Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Zn(ac/ch)=TVS SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) Zn(ch)=TVS(sc) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS

o 3a. Mainstem of the San Miguel River from its inception at the Aq Life Cold 1 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=1000(Trec) Se(ac/ch)=TVS confluence of Bridal Veil and Ingram Creeks to a point immediately Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=7.6(Trec) Pb(ac/ch)=TVS Ag(ac)=TVS above the confluence of Marshall Creek. Agriculture D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ch)=190 pH=6.5-9.0 CN=.005 NO3=100 CrIII(ac/ch)=TVS Hg(ch)=0.01(tot) E.Coli=126/100ml CrIII(ch)=100(Trec) Mo(ch)=160(Trec) CrVI(ac/ch)=TVS Ni(ac/ch)=TVS Cu(ac/ch)=TVS

3b. Mainstem of the San Miguel River from a point immediately above Aq Life Cold 1 April-May NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Se(ac/ch)=TVS o the confluence of Marshall Creek to a point immediately above the Recreation E T(DM)=14.0 C Cl2(ac)=0.019 B=0.75 As(ch)= 0.02(Trec) Fe(ch)=1000(Trec) Ag(ac)=TVS o confluence of the South Fork San Miguel River. Water Supply T(MW AT)=9.0 C Cl2(ch)=0.011 NO2=0.5 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ch)=TVS(tr) Agriculture June-Sept CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Zn(ch)=190 o T(DM)=21.7 C Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) o T(MW AT)=17.0 C SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) Oct CrVI(ac/ch)=TVS Mo(ch)=160(Trec) o T(DM)=13.9 C Cu(ch)=TVS Ni(ac/ch)=TVS o T(MW AT)=9.0 C Nov-March o T(DM)=13.0 C o T(MW AT)=9.0 C D.O.=6.0 mg/l D.O.(sp)=7.0 mg/l pH=6.5-9.0 E.Coli=126/100ml

o 4a. Mainstem of the San Miguel River from a point immediately above Aq Life Cold 1 T=TVS(CS-II) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS the confluence of the South Fork of the San Miguel River to a point Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS immediately below the CC ditch. Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Zn(ac/ch)=TVS SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS

4b. Mainstem of the San Miguel River from a point immediately below Aq Life Warm 1 March-Oct NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS o the CC ditch to a point immediately below the confluence of Naturita Recreation E T(DM)=30.9 C Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS o Creek. Water Supply T(MW AT)=23.3 C Cl2(ch)=0.011 NO2=0.5 Cd(ac/ch)=TVS Pb(ac/ch)=TVS Ag(ac/ch)=TVS Agriculture Nov-Feb CN=.005 NO3=10 CrIII(ac)=50(Trec) Mn(ac/ch)=TVS Zn(ac/ch)=TVS o T(DM)=13.0 C Cl=250 CrIII(ch)=TVS Mn(ch)=WS(dis) o T(MW AT)=9.0 C SO4=WS CrVI(ac/ch)=TVS Hg(ch)=0.01(tot) D.O.= 5.0 mg/l Cu(ac/ch)=TVS Mo(ch)=160(Trec) pH=6.5-9.0 E.Coli=126/100ml

o 5. Mainstem of the San Miguel River from a point immediately below Aq Life Warm 1 T=TVS(WS-II) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=1000(Trec) Se(ac/ch)=TVS the confluence of Naturita Creek to its confluence with the Dolores Recreation E D.O.=5.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=7.6(Trec) Pb(ac/ch)=TVS Ag(ac/ch)=TVS River. Agriculture pH=6.5-9.0 Cl2(ch)=0.011 NO2=0.5 Cd(ac/ch)=TVS Mn(ac/ch)=TVS U(ac)=TVS E.Coli=126/100ml CN=.005 NO3=100 CrIII(ac/ch)=TVS Hg(ch)=0.01(tot) U(ch)=16.8- CrIII(ch)=100(Trec) Mo(ch)=160(Trec) 301(Trec) CrVI(ac/ch)=TVS Ni(ac/ch)=TVS Zn(ac/ch)=TVS Cu(ac/ch)=TVS

35.6(4) STREAM CLASSIFICATIONS and WATER QUALITY STANDARDS

REGION: 10 Desig Classifications NUMERIC STANDARDS TEMPORARY

PHYSICAL MODIFICATIONS INORGANIC METALS and AND BASIN: San Miguel River mg/l ug/l Stream Segment Description BIOLOGICAL QUALIFIERS

o 6a. Mainstem of Ingram Creek including, all tributaries and wetlands, Aq Life Cold 2 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=1000(Trec) Se(ac/ch)=TVS from the source to the confluence with the San Miguel River. Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=100(Trec) Pb(ac/ch)=TVS Ag(ac/ch)=TVS Agriculture D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS pH=6.5-9.0 CN=.005 NO3=100 CrIII(ac/ch)=TVS Hg(ch)=0.01(tot) E.Coli=126/100ml CrIII(ch)=100(Trec) Mo(ch)=160(Trec) CrVI(ac/ch)=TVS Ni(ac/ch)=TVS Cu(ac/ch)=TVS

o 6b. Mainstem of Marshall Creek, including all tributaries and wetlands, Aq Life Cold 2 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=1000(Trec) Se(ac/ch)=TVS from the source to the confluence with the San Miguel River. Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=100(Trec) Pb(ac/ch)=TVS Ag(ac/ch)=TVS Agriculture D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ch)=190 pH=6.5-9.0 CN=.005 NO =100 CrIII(ac/ch)=TVS Hg(ch)=0.01(tot) E.Coli=126/100ml 3 CrIII(ch)=100(Trec) Mo(ch)=160(Trec) CrVI(ac/ch)=TVS Ni(ac/ch)=TVS Cu(ac/ch)=TVS

o 7. Mainstem of the Howard Fork and, all tributaries, and wetlands, Aq Life Cold 1 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ag(ac)=TVS from a point immediately below the confluence of Swamp Gulch to Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)= 0.02(Trec) Fe(ch)=1000(Trec) Ag(ch)=TVS(tr) its confluence with the South Fork of the San Miguel River. Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Zn(ac/ch)=TVS Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS Ni(ac/ch)=TVS Se(ac/ch)=TVS

o 8. Mainstem of the South Fork of the San Miguel River from its Aq Life Cold 1 T=TVS(CS-II) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS inception at the confluence of the Howard and Lake Forks to its Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS confluence with the San Miguel River. Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=80 Zn(ac/ch)=TVS SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS

o 9. All tributaries to the San Miguel River, including all wetlands from Aq Life Cold 1 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS a point immediately below the confluence of Leopard Creek to the Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Dolores River that are within the boundaries of the Uncompahgre Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS National Forest. Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Zn(ac/ch)=TVS SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS

o 10. Mainstem of Naturita Creek from the point it exits the Aq Life Cold 1 T=TVS(CS-II) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS Uncompahgre National Forest at the most downstream boundary Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS to its confluence with the San Miguel River. Mainstem of Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS Tabeguache Creek from its source to the confluence with the San Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ch)=75 Ag(ch)=TVS(tr) Miguel River. E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ac/ch)=TVS Zn(ac/ch)=TVS SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS

o 11a. All tributaries to Miramonte Reservoir and West Naturita Creek Aq Life Cold 1 T=TVS(CS-II) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=1000(Trec) Ag(ac)=TVS from their sources to the Uncompahgre National Forest Boundary Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=7.6(Trec) Pb(ac/ch)=TVS Ag(ch)=TVS(tr) below Miramonte Reservoir. The mainstems of Beaver and Agriculture D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Mn(ac/ch)=TVS Zn(ac/ch)=TVS Horsefly Creeks from the Uncompahgre National Forest boundary pH=6.5-9.0 CN=.005 NO3=100 Cd(ch)=TVS Hg(ch)=0.01(tot) to their confluences with the San Miguel River. E.Coli=126/100ml CrIII(ac/ch)=TVS Mo(ch)=160(Trec) CrIII(ch)=100(Trec) Ni(ac/ch)=TVS CrVI(ac/ch)=TVS Se(ac/ch)=TVS Cu(ac/ch)=TVS

o 11b. Mainstem of Saltado Creek from the Uncompahgre National Aq Life Cold 1 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=1000(Trec) Se(ac/ch)=TVS Forest boundary to the confluence with the San Miguel River. Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=7.6(Trec) Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Mn(ac/ch)=TVS Ag(ch)=TVS(tr) pH=6.5-9.0 CN=0.005 NO3=100 Cd(ch)=TVS Hg(ch)=0.01(tot) Zn(ac/ch)=TVS E.Coli=126/100ml CrIII(ac/ch)=TVS Mo(ch)=160(Trec) CrIII(ch)=100(Trec) Ni(ac/ch)=TVS CrVI(ac/ch)=TVS Cu(ac/ch)=TVS

35.6(4) STREAM CLASSIFICATIONS and WATER QUALITY STANDARDS

REGION: 10 Desig Classifications NUMERIC STANDARDS TEMPORARY

PHYSICAL MODIFICATIONS INORGANIC METALS and AND BASIN: San Miguel River mg/l ug/l Stream Segment Description BIOLOGICAL QUALIFIERS

o 12a. All tributaries and wetlands to the San Miguel River from a point Aq Life Cold 2 T=TVS(CS-II) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS Water + Fish immediately below the confluence of Leopard Creek to a point Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Standards immediately above Naturita Creek with the exceptions listed in Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS Segments 9, 10, 11a, and 11b. Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) U(ac)=TVS SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) U(ch)=16.8- CrVI(ac/ch)=TVS Mo(ch)=160(Trec) 301(Trec) Cu(ac/ch)=TVS Zn(ac/ch)=TVS

o 12b. All tributaries and wetlands to the San Miguel River from a point Aq Life Cold 2 T=TVS(CS-II) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Se(ac/ch)=TVS Water + Fish immediately above Naturita Creek to the confluence with the Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Ag(ac)=TVS Standards Dolores River, excluding the listings in Segments 9, 10, 11a, and Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ch)=TVS(tr) 11b. Agriculture pH=6.5-9.0 CN=0.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS U(ac)=TVS E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) U(ch)=16.8- 1 SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) 30 (Trec) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Zn(ac/ch)=TVS Cu(ac/ch)=TVS Ni(ac/ch)=TVS

o 13. All lakes and reservoirs tributary to the San Miguel River and within OW Aq Life Cold 1 T=TVS(CL) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Se(ac/ch)=TVS the boundaries of the Lizard Head, or Mount Sneffels Wilderness Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Ag(ac)=TVS Areas. Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ch)=TVS(tr) Agriculture pH=6.5-9.0 CN=0.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS Ni(ac/ch)=TVS

o 14. All lakes and reservoirs tributary to the San Miguel River from its Aq Life Cold 1 T=TVS(CL) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Se(ac/ch)=TVS sources to a point immediately below the confluence of Leopard Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Ag(ac)=TVS Creek, excluding the listings in Segments 13, 15, 16, 17 and 20. Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ch)=TVS(tr) This segment includes Lake Hope, Cushman Lake, Alta Lakes, Blue Agriculture pH=6.5-9.0 CN=0.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS Lake, Mud Lake, and Woods Lake. E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS Ni(ac/ch)=TVS

o 15. All lakes and reservoirs tributary to Ingram Creek from the source to Aq Life Cold 2 T=TVS(CL) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=1000(Trec) Se(ac/ch)=TVS the confluence with the San Miguel River. This segment includes Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=100(Trec) Pb(ac/ch)=TVS Ag(ac/ch)=TVS Ingram Lake. Agriculture D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS pH=6.5-9.0 CN=0.005 NO3=100 CrIII(ac/ch)=TVS Hg(ch)=0.01(tot) E.Coli=126/100ml CrIII(ch)=100(Trec) Mo(ch)=160(Trec) CrVI(ac/ch)=TVS Ni(ac/ch)=TVS Cu(ac/ch)=TVS

o 16. All lakes and reservoirs tributary to Marshall Creek from the source Aq Life Cold 2 T=TVS(CL) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=1000(Trec) Se(ac/ch)=TVS to the confluence with the San Miguel River. This segment includes Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=100(Trec) Pb(ac/ch)=TVS Ag(ac/ch)=TVS Thorne Lake. Agriculture D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ch)=190 pH=6.5-9.0 CN=0.005 NO =100 CrIII(ac/ch)=TVS Hg(ch)=0.01(tot) E.Coli=126/100ml 3 CrIII(ch)=100(Trec) Mo(ch)=160(Trec) CrVI(ac/ch)=TVS Ni(ac/ch)=TVS Cu(ac/ch)=TVS

o 17. All lakes and reservoirs tributary to the Howard Fork from a point Aq Life Cold 1 T=TVS(CL) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=1000(Trec) Se(ac/ch)=TVS immediately below the confluence of Swamp Gulch to the Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=7.6(Trec) Pb(ac/ch)=TVS Ag(ac)=TVS confluence with the South Fork of the San Miguel River. Agriculture D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Mn(ac/ch)=TVS Ag(ch)=TVS(tr) pH=6.5-9.0 CN=0.005 NO3=100 Cd(ch)=TVS Hg(ch)=0.01(tot) Zn(ac/ch)=TVS E.Coli=126/100ml CrIII(ac/ch)=TVS Mo(ch)=160(Trec) CrIII(ch)=100(Trec) Ni(ac/ch)=TVS CrVI(ac/ch)=TVS Cu(ac/ch)=TVS

o 18. All lakes and reservoirs tributary to the San Miguel River from a Aq Life Cold 1 T=TVS(CL) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS point immediately below the confluence of Leopard Creek to the Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS confluence with the Dolores River, and that are within Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS Uncompahgre National Forest boundaries. This segment includes Agriculture pH=6.5-9.0 CN=0.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) Hoffman Reservoir, Paxton Reservoir, and Hotchkiss Reservoir. E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Zn(ac/ch)=TVS SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS

35.6(4) STREAM CLASSIFICATIONS and WATER QUALITY STANDARDS

REGION: 10 Desig Classifications NUMERIC STANDARDS TEMPORARY

PHYSICAL MODIFICATIONS INORGANIC METALS and AND BASIN: San Miguel River mg/l ug/l Stream Segment Description BIOLOGICAL QUALIFIERS

o 19. All lakes and reservoirs tributary to the San Miguel River from a Aq Life Cold 1 T=TVS(CL) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS point immediately below the confluence of Leopard Creek to the Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=7.6(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Dolores River, and not within Uncompahgre National Forest Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS boundaries, excluding the listings in Segment 19. This segment Agriculture pH=6.5-9.0 CN=0.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) includes Point Reservoir, Palmers Lake, Williams Reservoir, and E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Hg(ch)=0.01(tot) Zn(ac/ch)=TVS Lilylands Reservoir. SO4=WS CrIII(ac/ch)=TVS Mn(ch)=WS(dis) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS

o 20. Trout Lake, Gurley Reservoir, Cone Reservoir, and Miramonte Aq Life Cold 1 T=TVS(CLL) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS Reservoir. Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture pH=6.5-9.0 CN=0.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Zn(ac/ch)=TVS SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS

35.6(4) STREAM CLASSIFICATIONS and WATER QUALITY STANDARDS

REGION: 10 Desig Classifications NUMERIC STANDARDS TEMPORARY

PHYSICAL MODIFICATIONS INORGANIC METALS and AND BASIN: Lower Dolores River mg/l ug/l Stream Segment Description BIOLOGICAL QUALIFIERS

1a. Mainstem of the Dolores River from the bridge at Bradfield Aq Life Cold 1 Mar 23 –Oct 31 NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS o Ranch (Forest Route 505, near Montezuma/Dolores County Recreation E T(DM)=26.6 C Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS o Line) to a point immediately above the confluence with Big Water Supply T(MW AT)=23.8 C Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS Canyon Creek near Dove Creek. Agriculture Nov 1- Mar 22 CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) o T(DM)=13.0 C Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) U(ac)=TVS o 1 T(MW AT)=9.0 C SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) U(ch)=16.8-30 (Trec) D.O.=6.0 mg/l CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Zn(ac/ch)=TVS D.O.(sp)=7.0 mg/l Cu(ac/ch)=TVS pH=6.5-9.0 E.Coli=126/100ml

1b. Mainstem of the Dolores River from a point immediately above Aq Life Cold 1 Mar 23-Oct 31 NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS o the confluence with Big Canyon Creek near Dove Creek to a Recreation E T(DM)=27.6 C Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS o point immediately above the Highway 141 road crossing near Water Supply T(MW AT)=24.7 C Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS Slick Rock. Agriculture Nov 1- Mar 22 CN=0.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) o T(DM)=13.0 C Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) U(ac)=TVS o 1 T(MW AT)=9.1 C SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) U(ch)=16.8-30 (Trec) D.O.=6.0 mg/l CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Zn(ac/ch)=TVS D.O.(sp)=7.0 mg/l Cu(ac/ch)=TVS pH=6.5-9.0 E.Coli=126/100ml

o 2. Mainstem of the Dolores River from the Highway 141 road Aq Life Warm 1 T=TVS(WS-II) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Se(ac/ch)=TVS crossing near Slick Rock to the Colorado/Utah border. Recreation E D.O.=5.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)= 0.02(Trec) Fe(ch)=1000(Trec) Ag(ac)=TVS Water Supply pH=6.5-9.0 Cl2(ch)=0.011 NO2=0.5 Cd(ac/ch)=TVS Pb(ac/ch)=TVS Ag(ch)=TVS Agriculture E.Coli=126/100ml CN=.005 NO3=10 CrIII(ac)=50(Trec) Mn(ac/ch)=TVS U(ac)=TVS Cl=250 CrIII(ch)=TVS Mn(ch)=WS(dis) U(ch)=16.8-301(Trec) SO4=WS CrVI(ac/ch)=TVS Hg(ch)=0.01(tot) Zn(ac/ch)=TVS Cu(ac/ch)=TVS Mo(ch)=160(Trec) Ni(ac/ch)=TVS

o 3a. All tributaries to the Dolores River, including all wetlands, from Aq Life Warm 2 T=TVS(WS-II) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Se (ac/ch)= TVS the bridge at Bradfield Ranch (Forest Route 505, near Recreation E D.O.=5.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02- Fe(ch)=1000(Trec) Ag(ac/ch)=TVS 1 Montezuma/Dolores County Line) to the Colorado/Utah border, Water Supply pH=6.5-9.0 Cl2(ch)=0.011 NO2=0.5 10(Trec) Pb(ac/ch)= TVS Zn(ac/ch)= TVS except for specific listings in Segments 3b, 3c, 4, 5, and 6. Agriculture E.Coli=126/100ml CN=0.005 NO3=10 Cd(ac/ch)= TVS Mn(ac/ch)= TVS UP Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS Ni(ac/ch)=TVS

o 3b. All tributaries to the Dolores River, including wetlands, that are Aq Life Cold 1 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=1000(Trec) Se(ac/ch)=TVS within national forest boundaries, from the bridge at Bradfield Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=7.6(Trec) Pb(ac/ch)=TVS Ag(ac)=TVS Ranch (Forest Route 505, near the Montezuma/Dolores Agriculture D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Mn(ac/ch)=TVS Ag(ch)=TVS(tr) County Line) to the Colorado/Utah border, excluding the small pH=6.5-9.0 CN=0.005 NO3=100 Cd(ch)=TVS Hg(ch)=0.01(tot) Zn(ac/ch)=TVS area of Uncompahgre National Forest within the E.Coli=126/100ml CrIII(ac/ch)=TVS Mo(ch)=160(Trec) Zn(ch)=TVS(sc) Disappointment Valley and the listings in Segments 3c, 4, 5, CrIII(ch)=100(Trec) Ni(ac/ch)=TVS and 6. Disappointment Creek, including all tributaries and CrVI(ac/ch)=TVS wetlands, from the source to a point immediately below the Cu(ac/ch)=TVS confluence with Morrison Creek.

o 3c. Mainstem and all tributaries to Salt Creek, including all Aq Life Warm 2 T=TVS(WS-III) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Cu(ac/ch)=TVS Se(ac)= TVS wetlands from the source within the Sinbad Valley to the Recreation E D.O.=5.0 mg/l Cl2(ac)=0.019 B(ch)=0.75 As(ch)=100(Trec) Fe(ch)=1000(Trec) Se(ch)= 6.6 confluence with the Dolores River. Agriculture pH=6.5-9.0 Cl2(ch)=0.011 NO2=0.5 Cd(ac/ch)=TVS Pb(ac/ch)=TVS Ag(ac/ch)=TVS E.Coli=126/100ml CN=.005 NO3=100 CrIII(ac/ch)=TVS Mn(ac/ch)=TVS U(ac)=TVS CrIII(ch)=100(Trec) Hg(ch)=0.01(tot) U(ch)=16.8-301(Trec) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Zn(ac/ch)= TVS Ni(ac/ch)=TVS

o Aq Life Warm 1 T=TVS(WS-II) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Se(ac/ch)=TVS 4. Mainstem of West Paradox Creek from the Manti-La Sal Recreation E D.O.=5.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)= 0.02(Trec) Fe(ch)=1000(Trec) Ag(ac)=TVS National Forest boundary to the confluence with the Dolores Water Supply pH=6.5-9.0 Cl2(ch)=0.011 NO2=0.5 Cd(ac/ch)=TVS Pb(ac/ch)=TVS Ag(ch)=TVS River. Mainstem and all tributaries to Blue Creek from the Agriculture E.Coli=126/100ml CN=.005 NO3=10 CrIII(ac)=50(Trec) Mn(ac/ch)=TVS U(ac)=TVS Uncompahgre National Forest boundary to the confluence with Cl=250 CrIII(ch)=TVS Mn(ch)=WS(dis) U(ch)=16.8-301(Trec) the Dolores River. SO4=WS CrVI(ac/ch)=TVS Hg(ch)=0.01(tot) Zn(ac/ch)=TVS Cu(ac/ch)=TVS Mo(ch)=160(Trec) Ni(ac/ch)=TVS 29

35.6(4) STREAM CLASSIFICATIONS and WATER QUALITY STANDARDS

o 5. Mainstem of West Creek from the source to the confluence with Aq Life Cold 1 T=TVS(CS-II) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Ni(ac/ch)=TVS the Dolores River. Roc Creek including all tributaries and Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Se(ac/ch)= TVS wetlands from the Manti-La Sal National Forest boundary to Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS the confluence with the Dolores River. La Sal Creek, including Agriculture pH=6.5-9.0 CN=.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) all tributaries and wetlands, from the Utah/Colorado border to E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) U(ac)=TVS 1 the confluence with the Dolores River. Mesa Creek, including SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) U(ch)=16.8-30 (Trec) all tributaries and wetlands, from the Uncompahgre National CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Zn(ac/ch)=TVS Forest boundary to the confluence with the Dolores River. Cu(ac/ch)=TVS

o 6. North Fork of West Creek, including all tributaries and Aq Life Cold 1 T=TVS(CS-I) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Se(ac/ch)= TVS wetlands, from the source to the confluence with West Creek. Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=0.02(Trec) Fe(ch)=1000(Trec) Ag(ac)=TVS Granite Creek, including all tributaries and wetlands, from the Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ch)=TVS(tr) source the Colorado/Utah border. Agriculture pH=6.5-9.0 CN=0.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Cu(ac/ch)=TVS Ni(ac/ch)=TVS

o 7. All lakes and reservoirs tributary to the Dolores River, from the Aq Life Cold 1 T=TVS(CL) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)=WS(dis) Se(ac/ch)=TVS bridge at Bradfield Ranch (Forest Route 505, near Recreation E D.O.=6.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)= 0.02(Trec) Fe(ch)=1000(Trec) Ag(ac)=TVS Montezuma/Dolores County Line) to the Colorado/Utah border, Water Supply D.O.(sp)=7.0 mg/l Cl2(ch)=0.011 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ch)=TVS(tr) and within national forest boundaries. This segment includes Agriculture pH=6.5-9.0 CN=0.005 NO3=10 Cd(ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS Long Park Reservoir, Cabin Reservoir, Beef Trail Reservoir, E.Coli=126/100ml Cl=250 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Dry Lake, Glade Lake, Glade Point Reservoir, Arrowhead SO4=WS CrIII(ch)=TVS Hg(ch)=0.01(tot) Lake, Morrison Lake, Old Dunham Reservoir, Belmear Lake, CrVI(ac/ch)=TVS Mo(ch)=160(Trec) Buckeye Reservoir, Black Pine Reservoir, Casto Reservoir, Cu(ac/ch)=TVS Ni(ac/ch)=TVS and Big Creek Reservoir.

o 8. All lakes and reservoirs tributary to the Dolores River, from the Aq Life Warm 2 T=TVS(WL) C NH3(ac/ch)=TVS S=0.002 As(ac)=340 Fe(ch)= 1000(Trec) Se(ac/ch)=TVS bridge at Bradfield Ranch (Forest Route 505, near Recreation E D.O.=5.0 mg/l Cl2(ac)=0.019 B=0.75 As(ch)=100(Trec) Pb(ac/ch)=TVS Ag(ac/ch)=TVS Montezuma/Dolores County Line) to the Colorado/Utah border, Agriculture pH=6.5-9.0 Cl2(ch)=0.011 NO2=0.5 Cd(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS and not within national forest boundaries. UP E.Coli=126/100ml CN=0.005 NO3=100 CrIII(ac/ch)=TVS Hg(ch)=0.01(tot) CrIII(ch)=100(Trec) Mo(ch)=160(Trec) CrVI(ac/ch)=TVS Ni(ac/ch)=TVS Cu(ac/ch)=TVS

STREAM CLASSIFICATIONS and WATER QUALITY STANDARDS – FOOTNOTES

(1) Whenever a range of standards is listed and referenced to this footnote, the first number in the range is a strictly health-based value, based on the Commission’s established methodology for human health-based standards. The second number in the range is a maximum contaminant level, established under the federal Safe Drinking Water Act that has been determined to be an acceptable level of this chemical in public water supplies, taking treatability and laboratory detection limits into account. Control requirements, such as discharge permit effluent limitations, shall be established using the first number in the range as the ambient water quality target, provided that no effluent limitation shall require an “end-of-pipe” discharge level more restrictive than the second number in the range. Water bodies will be considered in attainment of this standard, and not included on the Section 303(d) List, so long as the existing ambient quality does not exceed the second number in the range.