Page 1 STREAM CLASSIFICATIONS and WATER QUALITY STANDARDS

REGION: 12 Desig Classifications NUMERIC STANDARDS TEMPORARY MODIFICATIONS BASIN: Upper River AND PHYSICAL INORGANIC METALS QUALIFIERS and Stream Segment Description BIOLOGICAL mg/l ug/l

1. Mainstem of the Colorado River, including all tributaries, wetlands, lakes and OW Aq Life Cold 1 D.O. = 6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS reservoirs, within Rocky Mountain National Park, or which flow into Rocky Recreation 1a D.O. (sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Mountain National Park. Water Supply pH = 6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Mn(ch)=WS Ag(ch)=TVS(tr) E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS

SO4=WS Cu(ac/ch)=TVS Hg(ch)=0.01(tot)

2. Mainstem of the Colorado River, including all tributaries, wetlands, lakes, Aq Life Cold 1 D.O. = 6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS and reservoirs within, or flowing into Arapahoe , Recreation 1a D.O. (sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS including Grand Lake, Shadow Mountain Lake and Lake Granby. Water Supply pH = 6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Mn(ch)=WS Ag(ch)=TVS(tr) E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS

SO4=WS Cu(ac/ch)=TVS Hg(ch)=0.01(tot)

3. Mainstem of the Colorado River from the outlet of Lake Granby to the Aq Life Cold 1 D.O. = 6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS confluence with Roaring Fork River. Recreation 1a D.O. (sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Water Supply pH = 6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Mn(ch)=WS Ag(ch)=TVS(tr) E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS

SO4=WS Cu(ac/ch)=TVS Hg(ch)=0.01(tot)

4. All tributaries to the Colorado River, including all wetlands, from the outlet of Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS Lake Granby to the confluence with the Roaring Fork River, which are on Recreation 1a D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS National Forest lands, except for those tributaries included in Segments 1 Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS and 2, and specific listings in Segments 8, 9 and 10. Agriculture F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Mn(ch)=WS Ag(ch)=TVS(tr) E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS

SO4=WS Cu(ac/ch)=TVS Hg(ch)=0.01(tot)

5. All lakes and reservoirs tributary to the Colorado River from the boundary of Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS Rocky Mountain National Park and Arapahoe National Recreation Area to a Recreation 1a D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS point immediately below the confluence with the Roaring Fork River which Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS are not on National Forest lands, except for specific listing in Segments 1 Agriculture F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Mn(ch)=WS Ag(ch)=TVS(tr) and 9. E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS

SO4=WS Cu(ac/ch)=TVS Hg(ch)=0.01(tot)

6a. All tributaries to the Colorado River, including all wetlands, from the Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Cu(ac/ch)=TVS Hg(ch)=0.01(tot boundary of Rocky Mountain National Park and Arapahoe National Recreation 2 D.O.(sp)=7.0 mg/l NH3(ch)=0.02 NO2=0.05 Cd(ac)=TVS(tr) Fe(ch)=WS(dis) Ni(ac/ch)=TVS Recreation Area toa point immediately below the confluence with the Blue Water Supply pH=6.5-9.0 Cl2(ac)=0.019 B=0.75 Cd(ch)=TVS Fe(ch)=1000(Trec) Se(ac/ch)=TVS River which are not on National Forest lands, except for specific listings in Agriculture F.Coli=2000/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Pb(ac/ch)=TVS Ag(ac)=TVS Segments 6b, 6c, 7b, 8 and 10. E.Coli=630/100ml CN=0.005 Cl=250 CrIII(ch)=TVS Mn(ch)=WS Ag(ch)=TVS(tr)

SO4=WS CrVI(ac/ch)=TVS Mn(ac/ch)=TVS) Zn(ac/ch)=TVS 6b. Mainstem of un-named tributary from the headwaters (Sec 32, T3N, R76W) Aq Life Cold 2 D.O.=6.0 mg/l CN=0.2 S=0.002 As(ac)=100 Cu(ac)=200 Se(ch)=20 All metals are Trec to Willow Creek Reservoir Road (Section 8, T2N, R76W). UP Recreation 2 D.O.(sp)=7.0 mg/l B=0.75 Cd(ch)=10 Pb(ch)=100 Zn(ch)=2000 unless otherwise

Agriculture pH=6.5-9.0 NO2=0.05 CrIII(ch)=100 Mn(ch)=200 noted. F.Coli=2000/100ml NO3=10 CrVI(ch)=100 Ni(ac/ch)=200 E.Coli=630/100ml Page 2 STREAM CLASSIFICATIONS and WATER QUALITY STANDARDS

REGION: 12 Desig Classifications NUMERIC STANDARDS TEMPORARY MODIFICATIONS BASIN: Upper Colorado River AND PHYSICAL INORGANIC METALS QUALIFIERS and Stream Segment Description BIOLOGICAL mg/l ug/l

6c. Mainstem of un-named tributary to Willow Creek from the Willow Creek Aq Life Cold 2 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ch)=100(Trec) Cu(ac/ch)=TVS Ni(ac/ch)=TVS Reservoir Rd (Sec. 8, T2N, R76W) to the confluence Willow Creek (Sec. 17, UP Recreation 2 D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS T2N, R76W). Agriculture pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS F.Coli=2000/100ml Cl2(ch)=0.011 CrIII(ac/ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) E.Coli=630/100ml CN=0.005 CrVI(ac/ch)=TVS Hg(ch)=0.01(tot) Zn(ac/ch)=TVS

7a. All tributaries to the Colorado River, including all wetlands, from a point Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS immediately above the confluence with the Blue River to a point immediately Recreation 2 D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS below the confluence with the Roaring Fork River, which are not on National Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS Forest lands, except for specific listings in Segment 7b and in the Blue River, Agriculture F.Coli=2000/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Mn(ch)=WS Ag(ch)=TVS(tr) Eagle River, and Roaring Fork River basins. E.Coli=630/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS

SO4=WS Cu(ac/ch)=TVS Hg(ch)=0.01(tot)

7b. Mainstem of Muddy Creek, including all tributaries, from the outlet of Wolford Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS Mountain Reservoir to the confluence with the Colorado River; mainstems of Recreation 1a D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Rock Creek, Deep Creek, Sheephorn Creek, Sweetwater Creek and the Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS Piney River, including all tributaries, from their sources to their confluences Agriculture F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Mn(ch)=WS(dis) Ag(ch)=TVS(tr) with the Colorado River, which are not on National Forest lands. E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS

SO4=WS Cu(ac/ch)=TVS Hg(ch)=0.01(tot)

8. Mainstem of the Williams Fork River, including all tributaries and wetlands from Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS Point of compliance the source to the confluence with the Colorado River, except for those Recreation 1a D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS` for Fe and Mn at tributaries listed in segment 9. Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS Aspen Canyon Agriculture F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Mn(ch)=WS Ag(ch)=TVS(tr) Ranch well. E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS

SO4=WS Cu(ac/ch)=TVS Hg(ch)=0.01(tot)

9. All tributaries to the Colorado and Fraser Rivers, including all wetlands, lakes Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS and reservoirs, within the Never Summer, Indian Peaks, Byers, Eagles Nest OW Recreation 1a D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS and Flat Tops Wilderness Areas. Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Mn(ch)=WS Ag(ch)=TVS(tr) E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS

SO4=WS Cu(ac/ch)=TVS Hg(ch)=0.01(tot)

10. Mainstem of the Fraser River, including all tributaries and wetlands from the Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS source to the confluence with the Colorado River, except for those tributaries Recreation 1a D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS included in Segment 9. Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Mn(ch)=WS Ag(ch)=TVS(tr) E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS

SO4=WS Cu(ac/ch)=TVS Hg(ch)=0.01(tot) Page 3 STREAM CLASSIFICATIONS and WATER QUALITY STANDARDS

REGION: 12 Desig Classifications NUMERIC STANDARDS TEMPORARY MODIFICATIONS BASIN: Blue River AND PHYSICAL INORGANIC METALS QUALIFIERS and Stream Segment Description BIOLOGICAL mg/l ug/l

1. Mainstem of the Blue River from the source to Dillon Reservoir, except for specific Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS listing in Segments 2a and 2b. Recreation 1a D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Mn(ch)=WS Ag(ch)=TVS(tr) E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS

SO4=WS Cu(ac/ch)=TVS Hg(ch)=0.01(tot)

2a. Mainstem of the Blue River from the confluence with French Gulch to a point Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS one half mile below Summit County Road 3. UP Recreation 1a D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac/ch)=4 Fe(ch)=1000(Trec) Se(ac/ch)=TVS Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 CrIII(ac)=50(Trec) Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ch)=50 Mn(ch)=WS Ag(ch)=TVS(tr) E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=e(1.25(ln(h ard)+0.799)) SO4=WS Cu(ac/ch)=TVS Hg(ch)=0.01(tot)

2b. Mainstem of the Blue River from a point one half mile below Summit County Road Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS 3 to the confluence with the Swan River. Recreation 1a D.O.(sp)=7.0 mg/l NH (ch)=0.02 B=0.75 Cd(ac/ch)=1/2e(1.016 Fe(ch)=1000(Trec) Se(ac/ch)=TVS 3 6(ln(hard)-3.132)) Water Supply pH=6.5-9.0 Cl (ac)=0.019 NO =0.05 Pb(ac/ch)=TVS Ag(ac)=TVS 2 2 CrIII(ac)=50(Trec) Agriculture F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 Mn(ch)=WS Ag(ch)=TVS(tr) E.Coli=126/100ml CN=0.005 Cl=250 CrIII(ch)=50 Mn(ac/ch)=TVS Zn(ac/ch)=e(0.9805(l n(hard)+1.402)) SO =WS CrVI(ac/ch)=TVS Hg(ch)=0.01(tot) 4 Cu(ac/ch)=TVS

3. Dillon Reservoir, including all direct tributaries and all tributaries, wetlands, lakes Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS Special standards and reservoirs in the Blue River drainage above Dillon Reservoir, except for Recreation 1a D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS for Dillon Reservoir specific listings in Segments 1, 2, 5, 6, 10, 11, 12, 13 and 14. Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS only: Total Agriculture F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Mn(ch)=WS Ag(ch)=TVS(tr) Phosphorus as E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS P=0.0074 mg/l in

SO4=WS Cu(ac/ch)=TVS Hg(ch)=0.01(tot) the top 15 meters of the water column for the months of July, August, September & October. 4. Deleted.

5. Mainstem of Soda Creek from the source to Dillon Reservoir. Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ch)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS Recreation 1a D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Agriculture pH=6.0-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS Water Supply F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Mn(ch)=WS Ag(ch)=TVS(tr) E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS

SO4=WS Cu(ac/ch)=TVS Hg(ch)=0.01(tot)

6. Mainstem of the Snake River, including all tributaries and wetlands from the Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS Temporary source to Dillon Reservoir, except for specific listings in Segments 7, 8 and 9. UP Recreation 1a D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS modifications: Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS Cd(ch)=2.3 Agriculture F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Mn(ch)=WS Ag(ch)=TVS(tr) Cu(ch)=17 E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS no Zn(ac)

SO4=WS Cu(ac/ch)=TVS Hg(ch)=0.01(tot) Zn(ch)=654 Effective until 2/28/09.

7. Mainstem of Peru Creek, including all tributaries and wetlands from the source to Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ch)=100(Trec) Fe(ch)=1000(Trec) Ni(ac/ch)=TVS Temporary the confluence with the Snake River, except for specific listing in Segment 8. UP Recreation 2 D.O.(sp)=7.0 mg/l NH3(ch)=0.02 NO2=0.05 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Se(ac/ch)=TVS modifications: pH=6.5-9.0 Cl2(ac)=0.019 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ac)=TVS no Cd(ac) F.Coli=2000/100ml Cl2(ch)=0.011 CrIII(ac/ch)=TVS Hg(ch)=0.01(tot) Ag(ch)=TVS(tr) Cd(ch)=5.2 E.Coli=630/100ml CN=0.005 CrVI(ac/ch)=TVS Zn(ac/ch)=TVS Cu(ch)=79 Cu(ac/ch)=TVS Pb(ch)=6.7 no Zn(ac) Zn(ch)=1,380 Effective until 2/28/09. Page 4 STREAM CLASSIFICATIONS and WATER QUALITY STANDARDS

REGION: 12 Desig Classifications NUMERIC STANDARDS TEMPORARY MODIFICATIONS BASIN: Blue River AND PHYSICAL INORGANIC METALS QUALIFIERS and Stream Segment Description BIOLOGICAL mg/l ug/l

8. Mainstem of Keystone Gulch, including all tributaries and wetlands from Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS the source to the confluence with the Snake River. Mainstem of Recreation 1a D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Chihuahua Creek including all tributaries, and wetlands from the source to Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS the confluence with Peru Creek. Mainstem of the North Fork of the Snake Agriculture F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Mn(ch)=WS Ag(ch)=TVS(tr) River, including all tributaries and wetlands from the source to the E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS

confluence with the Snake River. SO4=WS Cu(ac/ch)=TVS Hg(ch)=0.01(tot)

9. Mainstem of Deer Creek, including all tributaries and wetlands from the Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS source to the confluence with the Snake River. Recreation 1a D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Mn(ch)=WS Ag(ch)=TVS(tr) E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS

SO4=WS Cu(ac/ch)=TVS Hg(ch)=0.01(tot)

10. Mainstem of French Gulch including all tributaries and wetlands from the Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS source to a point 1.5 miles below Lincoln. Recreation 1a D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Mn(ch)=WS Ag(ch)=TVS(tr) E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS

SO4=WS Cu(ac/ch)=TVS Hg(ch)=0.01(tot)

11. Mainstem of French Gulch from a point 1.5 miles below Lincoln to the Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 Ac(ch)=100(Trec) Cu(ch)=TVS Ni(ac/ch)=TVS confluence with the Blue River. UP Recreation 1b D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac/ch)=existing Fe(ch)=1000(Trec) Se( ac/ch)=TVS Agriculture pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 quality Pb(ac/ch)=existing Ag(ac)=TVS F.Coli=325/100ml Cl2(ch)=0.011 CrIII(ac/ch)=TVS quality Ag(ch)=TVS(tr) E.Coli=205/100ml CN=0.005 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=existing Cu(ac)=TVS Hg(ch)=0.01(tot) quality

12. Mainstem of Illinois Gulch and Fredonia Gulch from their source to their Aq Life Cold 2 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS Temporary confluence with the Blue River. UP Recreation 1b D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Modification: Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS Zn(ch)=850 Agriculture F.Coli=325/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Mn(ch)=WS Ag(ch)=TVS(tr) Effective until E.Coli=205/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS 2/28/09 for Illinois

SO4=WS Cu(ac/ch)=TVS Hg(ch)=0.01(tot) Gulch

13. Mainstem of Tenmile Creek from the Climax Parshall Flume to a point Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ch)=100(Trec) Cu(ac/ch)=TVS Ni(ac/ch)=TVS immediately above the confluence of West Tenmile Creek and all tributaries Recreation 1b D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS and wetlands from the source of Tenmile Creek to a point immediately Agriculture pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS above the confluence with West Tenmile Creek, except for the specific F.Coli=325/100ml Cl2(ch)=0.011 Cr(ac/ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) listing in Segment 15. E.Coli=205/100ml CN=0.005 CrIII(ac/ch)=TVS Hg(ch)=0.01(tot) Zn(ac/ch)=TVS CrVI(ac/ch)=TVS

14. Mainstem of Tenmile Creek, including all tributaries and wetlands from a Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS point immediately above the confluence with West Tenmile Creek to Dillon Recreation 1a D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Reservoir, except for the specific listing in Segment 16. Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Mn(ch)=WS Ag(ch)=TVS(tr) E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS

SO4=WS Cu(ac/ch)=TVS Hg(ch)=0.01(tot)

15. Mainstem of Clinton Creek from the source to the confluence with Tenmile Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS Creek. Recreation 1a D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Mn(ch)=WS Ag(ch)=TVS(tr) E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS

SO4=WS Cu(ac/ch)=TVS Hg(ch)=0.01(tot) Page 5 STREAM CLASSIFICATIONS and WATER QUALITY STANDARDS

REGION: 12 Desig Classifications NUMERIC STANDARDS TEMPORARY MODIFICATIONS BASIN: Blue River AND PHYSICAL INORGANIC METALS QUALIFIERS and Stream Segment Description BIOLOGICAL mg/l ug/l

16. All tributaries to the Blue River, including all wetlands, lakes and reservoirs, Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS within the Eagles Nest and Ptarmigan Peak Wilderness Areas. OW Recreation 1a D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Mn(ch)=WS Ag(ch)=TVS(tr) E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS

SO4=WS Cu(ac/ch)=TVS Hg(ch)=0.01(tot)

17. Mainstem of the Blue River from the outlet of Dillon Reservoir to the Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS confluence with the Colorado River. Recreation 1a D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Mn(ch)=WS Ag(ch)=TVS(tr) E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS

SO4=WS Cu(ac/ch)=TVS Hg(ch)=0.01(tot)

18. All tributaries to the Blue River, including all wetlands, from the outlet of Dillon Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS Reservoir to the outlet of Green Mountain Reservoir, except for the specific Recreation 1a D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS listing in Segment 16. Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Mn(ch)=WS Ag(ch)=TVS(tr) E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS

SO4=WS Cu(ac/ch)=TVS Hg(ch)=0.01(tot)

19. All tributaries to the Blue River, including all wetlands, from the outlet of Green Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS Mountain Reservoir to the confluence with the Colorado River, except for Recreation 2 D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS specific listings in Segment 20. Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture F.Coli=2000/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Mn(ch)=WS Ag(ch)=TVS(tr) E.Coli=630/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS

SO4=WS Cu(ac/ch)=TVS Hg(ch)=0.01(tot)

20. Mainstems of Elliot Creek and Spruce Creek including all tributaries and Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS wetlands, from their sources to the confluence with the Blue River. Recreation 2 D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture F.Coli=2000/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Mn(ch)=WS Ag(ch)=TVS(tr) E.Coli=630/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS

SO4=WS Cu(ac/ch)=TVS Hg(ch)=0.01(tot)

Page 6 STREAM CLASSIFICATIONS and WATER QUALITY STANDARDS

REGION: 12 Desig Classifications NUMERIC STANDARDS TEMPORARY MODIFICATIONS BASIN: Eagle River AND PHYSICAL INORGANIC METALS QUALIFIERS and Stream Segment Description BIOLOGICAL mg/l ug/l

1. All tributaries and wetlands to the Eagle River system within the Gore Range - Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS 1 Area and Area. OW Recreation 1a D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Mn(ch)=WS Ag(ch)=TVS(tr) E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS

SO4=WS Cu(ac/ch)=TVS Hg(ch)=0.01(tot) 1 Consistent with the provisions of section 25-8-104 C.R.S. the OW designation shall not apply with respect to the Homestake Water Project of the Cities of Aurora and Colorado Springs.

2. Mainstem of The Eagle River from the source to the compressor house bridge at Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS Belden. Recreation 1a D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Mn(ch)=WS Ag(ch)=TVS(tr) E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS

SO4=WS Cu(ac/ch)=TVS Hg(ch)=0.01(tot)

3. All tributaries to the Eagle River, including wetlands, from the source to the Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS compressor house bridge at Belden, except for the specific listing in Segment 4 and Recreation 1a D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS those waters included in Segment 1. Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Mn(ch)=WS Ag(ch)=TVS(tr) E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS

SO4=WS Cu(ac/ch)=TVS Hg(ch)=0.01(tot)

4. Mainstem of Homestake Creek from the confluence of the East Fork to the Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS confluence with the Eagle River. Recreation 1a D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Mn(ch)=WS Ag(ch)=TVS(tr) E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS

SO4=WS Cu(ac/ch)=TVS Hg(ch)=0.01(tot)

5a Mainstem of the Eagle River from a point immediately above the compressor house 9/30/00 Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ch)=50(Trec) Fe(ch)=WS(dis) Hg(ch)=0.01(tot) Seasonal bridge at Belden to a point immediately above the Highway 24 Bridge near Tigiwon Baseline Recreation 1a D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Ni(ac/ch)=TVS Temporary Road. does not Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Se(ac/ch)=TVS Modifications apply Agriculture F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Mn(ch)=WS Ag(ac)=TVS effective through E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) 1/1/09.

SO4=WS Cu(ac/ch)=TVS Zn(ac)=TVS Zn(ch)=106 March 1 through April 30 Zn(ac)=472 Zn(ch)=410

May 1 through February 29 Zn(ac)=178 Zn(ch)=166

5b. Mainstem of the Eagle River from a point immediately above the Highway 24 9/30/00 Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ch)=50(Trec) Fe(ch)=WS(dis) Hg(ch)=0.01(tot) Seasonal Bridge near Tigiwon Road to a point immediately above the confluence with Martin Baseline Recreation 1a D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Ni(ac/ch)=TVS Temporary Creek. does not Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Se(ac/ch)=TVS Modifications apply Agriculture F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Mn(ch)=WS Ag(ac)=TVS effective through E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) 1/1/09.

SO4=WS Cu(ac/ch)=TVS Zn(ac)=TVS Zn(ch)=106 March 1 through April 30 Zn(ac)=332 Zn(ch)=310

May 1 through February 29 Zn(ac)=153 Zn(ch)=123 Page 7 STREAM CLASSIFICATIONS and WATER QUALITY STANDARDS

REGION: 12 Desig Classifications NUMERIC STANDARDS TEMPORARY MODIFICATIONS BASIN: Eagle River AND PHYSICAL INORGANIC METALS QUALIFIERS and Stream Segment Description BIOLOGICAL mg/l ug/l

5c. Mainstem of the Eagle River from a point immediately above Martin Creek to a 9/30/00 Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ch)=50(Trec) Fe(ch)=WS(dis) Hg(ch)=0.01(tot) Seasonal point immediately above the confluence with Gore Creek. Baseline Recreation 1a D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Ni(ac/ch)=TVS Temporary does not Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Se(ac/ch)=TVS Modifications apply Agriculture F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Mn(ch)=WS Ag(ac)=TVS effective through E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) 1/1/09.

SO4=WS Cu(ac/ch)=TVS Zn(ac)=TVS Zn(ch)=106 March 1 through April 30 Zn(ac)=275 Zn(ch)=257

May 1 through February 29 Zn(ac)=127 Zn(ch)=TVS

6. All tributaries to the Eagle River, including all wetlands, from the compressor house Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS bridge at Belden to a point immediately below the confluence with Lake Creek, Recreation 1a D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS except for the specific listings in Segments 1, 7 and 8. Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Mn(ch)=WS Ag(ch)=TVS(tr) E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS

SO4=WS Cu(ac/ch)=TVS Hg(ch)=0.01(tot)

7a. Mainstem of Cross Creek from the source to a point immediately below the Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS Minturn Middle School, except for those waters included in Segment 1. Recreation 1a D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ch)=TVS Agriculture F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ch)=50(Trec Mn(ch)=WS Ag(ch)=TVS(tr) E.Coli=126/100ml CN=0.005 Cl=250 ) Mn(ac/ch)=TVS Zn(ac/ch)=TVS

SO4=WS CrVI(ac/ch)=TVS Hg(ch)=0.01(tot) Cu(ac/ch)=TVS

7b. Mainstem of Cross Creek from a point immediately below the Minturn Middle 9/30/00 Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS Seasonal School to the confluence with the Eagle River, except for those waters included in Baseline Recreation 1a D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Temporary Segment 1. does not Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS Modifications apply Agriculture F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec Mn(ch)=WS Ag(ch)=TVS(tr) effective through E.Coli=126/100ml CN=0.005 Cl=250 ) Mn(ac/ch)=TVS Zn(ac/ch)=TVS 1/1/09.

SO4=WS CrVI(ac/ch)=TVS Hg(ch)=0.01(tot) Cu(ac/ch)=TVS March 1 through April 30 Zn(ac)=254 Zn(ch)=193

May 1 through February 29 Zn(ac)=120 Zn(ch)=116 Page 8 STREAM CLASSIFICATIONS and WATER QUALITY STANDARDS

REGION: 12 Desig Classifications NUMERIC STANDARDS TEMPORARY MODIFICATIO BASIN: Eagle River NS PHYSICAL INORGANIC METALS AND and QUALIFIERS Stream Segment Description BIOLOGICAL mg/l ug/l

8. Mainstem of Gore Creek from the confluence with Black Gore Creek to the Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS confluence with the Eagle River. Recreation 1a D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Mn(ch)=WS Ag(ch)=TVS(tr) E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS

SO4=WS Cu(ac/ch)=TVS Hg(ch)=0.01(tot)

9. Mainstem of the Eagle River from Gore Creek to the confluence with the Colorado Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS River. Recreation 1a D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Mn(ch)=WS Ag(ch)=TVS(tr) E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS

SO4=WS Cu(ac/ch)=TVS Hg(ch)=0.01(tot)

10. All tributaries to the Eagle River, including all wetlands, from a point immediately Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS below the confluence with Lake Creek to the confluence with the Colorado River, Recreation 1a D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS except for specific listings in Segments 11 and 12, and those waters included in Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS Segment 1. Agriculture F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Mn(ch)=WS Ag(ch)=TVS(tr) E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS

SO4=WS Cu(ac/ch)=TVS Hg(ch)=0.01(tot) 11. Mainstem of Alkali Creek from the source to the confluence with the Eagle River; Aq Life Cold 2 D.O.=6.0 mg/l CN(ac)=0.2 B=0.75 As(ch)=100(Trec) CrVI(ch)=100(Trec) Ni(ch)=200(Trec)

mainstem of Milk Creek from the source to the confluence with the Eagle River. UP Recreation1b D.O.(sp)=7.0 mg/l NO2(ac)=10 Cl=250 Be(ch)=100(Trec) Cu(ch)=200(Trec) Se(ac/ch)=TVS Agriculture pH=6.5-9.0 NO3(ac)=100 Cd(ch)=10(Trec) Pb(ch)=100(Trec) Zn(ch)=2000(Trec F.Coli=325/100ml CrIII(ch)=100(Trec Mn(ch)=200(Trec) ) E.Coli=205/100ml )

12. Mainstem of Brush Creek, from the source to the confluence with the Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS Eagle River, including the East and West Forks. Recreation 1a D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Mn(ch)=WS Ag(ch)=TVS(tr) E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS

SO4=WS Cu(ac/ch)=TVS Hg(ch)=0.01(tot) Page 9 STREAM CLASSIFICATIONS and WATER QUALITY STANDARDS

REGION: 12 Desig Classification NUMERIC STANDARDS TEMPORARY s MODIFICATIONS BASIN: Roaring Fork River AND PHYSICAL INORGANIC METALS QUALIFIERS and BIOLOGICAL mg/l ug/l Stream Segment Description

1. All tributaries to the Roaring Fork River system, including all wetlands, lakes and Aq Life Cold D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS reservoirs, within the Maroon Bells/Snowmass, Holy Cross, Raggeds, Collegiate Peaks OW 1 D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec Se(ac/ch)=TVS and the Hunter/Fryingpan Wilderness Areas. Recreation pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS ) Ag(ac)=TVS 1a F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Pb(ac/ch)=TVS Ag(ch)=TVS(tr) Water Supply E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ch)=WS Zn(ac/ch)=TVS

Agriculture SO4=WS Cu(ac/ch)=TVS Mn(ac/ch)=TVS Hg(ch)=0.01(tot)

2. Mainstem of the Roaring Fork River, including all tributaries and wetlands, from the Aq Life Cold D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS source to a point immediately below the confluence with Hunter Creek, except for those 1 D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec Se(ac/ch)=TVS tributaries included in Segment 1. Recreation pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS ) Ag(ac)=TVS 1a F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Pb(ac/ch)=TVS Ag(ch)=TVS(tr) Water Supply E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ch)=WS Zn(ac/ch)=TVS

Agriculture SO4=WS Cu(ac/ch)=TVS Mn(ac/ch)=TVS Hg(ch)=0.01(tot)

3a. Mainstem of the Roaring Fork River, including all tributaries and wetlands, Aq Life Cold D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS from a point immediately below the confluence with Hunter Creek, to the 1 D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec Se(ac/ch)=TVS confluence with the Colorado River except for those tributaries included in Recreation pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS ) Ag(ac)=TVS Segment 1 and specific listings in Segments 3b through 10. 1a F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Pb(ac/ch)=TVS Ag(ch)=TVS(tr) Water Supply E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ch)=WS Zn(ac/ch)=TVS

Agriculture SO4=WS Cu(ac/ch)=TVS Mn(ac/ch)=TVS Hg(ch)=0.01(tot)

3b. Mainstem of Red Canyon and all tributaries and wetlands from the source Aq Life Cold D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS to the confluence with the Roaring Fork River, except for Landis Creek UP 2 D.O.(sp)=7.0 mg/l NH3(ch)=0.1 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec Se(ac/ch)=TVS from its source to the Hopkins Ditch Diversion. Recreation 2 pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS ) Ag(ac)=TVS Water Supply F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Pb(ac/ch)=TVS Ag(ch)=TVS(tr) Agriculture E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ch)=WS Zn(ac/ch)=TVS

SO4=WS Cu(ac/ch)=TVS Mn(ac/ch)=TVS Hg(ch)=0.01(tot)

4. Mainstem of Brush Creek from the source to the confluence with the Roaring Fork River. Aq Life Cold D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ch)=100(Trec) Fe(ch)=1000(Trec Se(ac/ch)=TVS UP 1 D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) ) Ag(ac)=TVS Recreation pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ch)=TVS(tr) 1a F.Coli=200/100ml Cl2(ch)=0.011 CrIII(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS Agriculture E.Coli=126/100ml CN=0.005 CrVI(ac/ch)=TVS Hg(ch)=0.01(tot) Cu(ac/ch)=TVS Ni(ac/ch)=TVS

5. Mainstem of the Fryingpan River from the source to the confluence with the North Fork. Aq Life Cold D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS 1 D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec Se(ac/ch)=TVS Recreation pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS ) Ag(ac)=TVS 1a F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Pb(ac/ch)=TVS Ag(ch)=TVS(tr) Water Supply E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ch)=WS Zn(ac/ch)=TVS

Agriculture SO4=WS Cu(ac/ch)=TVS Mn(ac/ch)=TVS Hg(ch)=0.01(tot)

6. Mainstem of the Fryingpan River from the confluence with the North Fork to the Aq Life Cold D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS confluence with the Roaring Fork River. 1 D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec Se(ac/ch)=TVS Recreation pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS ) Ag(ac)=TVS 1a F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Pb(ac/ch)=TVS Ag(ch)=TVS(tr) Water Supply E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ch)=WS Zn(ac/ch)=TVS

Agriculture SO4=WS Cu(ac/ch)=TVS Mn(ac/ch)=TVS Hg(ch)=0.01(tot)

7. All tributaries to the Fryingpan River system, including all wetlands, except for those Aq Life Cold D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS tributaries included in Segment 1. 1 D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec Se(ac/ch)=TVS Recreation pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS ) Ag(ac)=TVS 1a F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Pb(ac/ch)=TVS Ag(ch)=TVS(tr) Water Supply E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ch)=WS Zn(ac/ch)=TVS

Agriculture SO4=WS Cu(ac/ch)=TVS Mn(ac/ch)=TVS Hg(ch)=0.01(tot)

8. Mainstem of the Crystal River, including all tributaries and wetlands, from the source to Aq Life Cold D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS the confluence with the Roaring Fork River, except for specific listings in Segments 1, 9 1 D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec Se(ac/ch)=TVS and 10. Recreation pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS ) Ag(ac)=TVS 1a F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Pb(ac/ch)=TVS Ag(ch)=TVS(tr) Water Supply E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ch)=WS Zn(ac/ch)=TVS

Agriculture SO4=WS Cu(ac/ch)=TVS Mn(ac/ch)=TVS Hg(ch)=0.01(tot) Page 10 STREAM CLASSIFICATIONS and WATER QUALITY STANDARDS Page 11 STREAM CLASSIFICATIONS and WATER QUALITY STANDARDS

REGION: 12 Desig Classification NUMERIC STANDARDS TEMPORARY s MODIFICATIONS BASIN: Roaring Fork River AND PHYSICAL INORGANIC METALS QUALIFIERS and Stream Segment Description BIOLOGICAL mg/l ug/l

9. Mainstem of Coal Creek including all tributaries and wetlands from the source to the Aq Life Cold D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS confluence with the Crystal River. 1 D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec Se(ac/ch)=TVS Recreation pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS ) Ag(ac)=TVS 1a F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Pb(ac/ch)=TVS Ag(ch)=TVS(tr) Water Supply E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ch)=WS Zn(ac/ch)=TVS

Agriculture SO4=WS Cu(ac/ch)=TVS Mn(ac/ch)=TVS Hg(ch)=0.01(tot)

10. Mainstem of Thompson Creek including all tributaries and wetlands from Aq Life Cold D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS the source to the confluence with the Crystal River. 1 D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec Se(ac/ch)=TVS Recreation pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS ) Ag(ac)=TVS 1a F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Pb(ac/ch)=TVS Ag(ch)=TVS(tr) Water Supply E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ch)=WS Zn(ac/ch)=TVS

Agriculture SO4=WS Cu(ac/ch)=TVS Mn(ac/ch)=TVS Hg(ch)=0.01(tot) Page 12 STREAM CLASSIFICATIONS and WATER QUALITY STANDARDS

REGION: 12 Desig Classifications NUMERIC STANDARDS TEMPORARY MODIFICATIONS BASIN: North Platte River AND PHYSICAL INORGANIC METALS QUALIFIERS and Stream Segment Description BIOLOGICAL mg/l ug/l

1. All tributaries to the North Platte and Encampment Rivers, including all wetlands, lakes Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS and reservoirs, within the Mount Zirkel, the Never Summer, and the Platte River OW Recreation 1a D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Wilderness Areas. Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.0 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture F.Coli=200/100ml Cl2(ch)=0.011 5 CrIII(ac)=50(Trec) Mn(ch)=WS Ag(ch)=TVS(tr) E.Coli=126/100ml CN=0.005 NO3=10 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS Cl=250 Cu(ac/ch)=TVS Hg(ch)=0.01(tot)

SO4=WS

2. Mainstem of the Encampment River, including all tributaries, wetlands, lakes and Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS reservoirs from the source to the Colorado/Wyoming border, except for those tributaries Recreation 1b D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS included in Segment 1. Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.0 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture F.Coli=325/100ml Cl2(ch)=0.011 5 CrIII(ac)=50(Trec) Mn(ch)=WS Ag(ch)=TVS(tr) E.Coli=205/100ml CN=0.005 NO3=10 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS Cl=250 Cu(ac/ch)=TVS Hg(ch)=0.01(tot)

SO4=WS

3. Mainstem of the North Platte River from the confluence of Grizzly Creek and Little Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS Grizzly Creek to the Colorado/Wyoming border. Recreation 1a D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.0 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture F.Coli=200/100ml Cl2(ch)=0.011 5 CrIII(ac)=50(Trec) Mn(ch)=WS Ag(ch)=TVS(tr) E.Coli=126/100ml CN=0.005 NO3=10 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS Cl=250 Cu(ac/ch)=TVS Hg(ch)=0.01(tot)

SO4=WS

4. All tributaries to the North Platte River system, including all wetlands, lakes and Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ch)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS reservoirs, except for those tributaries included in Segment 1, and specific listings in Recreation 1a D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Segments 5, 6 and 7. Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.0 Cd(ch)=TVS Mn(ch)=WS Ag(ac)=TVS Agriculture F.Coli=200/100ml Cl2(ch)=0.011 5 CrIII(ac)=50(Trec) Mn(ac/ch)=TVS Ag(ch)=TVS(tr) E.Coli=126/100ml CN=0.005 NO3=10 CrIII(ch)=TVS Pb(ac/ch)=TVS Zn(ac/ch)=TVS Cl=250 CrVI(ac/ch)=TVS Hg(ch)=0.01(tot)

SO4=WS Cu(ac/ch)=TVS

5a. Mainstem of the Michigan River from the source to the Colorado State Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Cu(ac/ch)=TVS Hg(ch)=0.01(tot) Forest boundary. Recreation 1a D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=WS(dis) Ni(ac/ch)=TVS Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.0 Cd(ch)=TVS Fe(ch)=1000(Trec) Se(ac/ch)=TVS Agriculture F.Coli=200/100ml Cl2(ch)=0.011 5 CrIII(ac)=50(Trec) Mn(ch)=WS Ag(ac)=TVS E.Coli=126/100ml CN=0.005 NO3=10 CrIII(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) Cl=250 CrVI(ac/ch)=TVS Pb(ac/ch)=TVS Zn(ac/ch)=TVS

SO4=WS

5b. Mainstem of the Michigan River from the Colorado State Forest Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ch)=50(Trec) Cu(ac/ch)=TVS Ni(ac/ch)=TVS boundary to the confluence with the North Platte River. Recreation 2 D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=WS(dis) Se(ac/ch)=TVS Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.0 Cd(ch)=TVS Fe(ch)=1000(Trec) Ag(ac)=TVS Agriculture F.Coli=2000/100ml Cl2(ch)=0.011 5 CrIII(ac)=TVS(Trec) Mn(ch)=WS Ag(ch)=TVS(tr) E.Coli=630/100ml CN=0.005 NO3=10 CrIII(ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS Cl=250 CrVI(ac/ch)=TVS Pb(ac/ch)=TVS

SO4=WS Hg(ch)=0.01(tot)

6. Mainstem of Pinkham Creek from the Routt National Forest boundary to the confluence Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ch)=100(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS with the North Platte River. Recreation 2 D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.0 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) F.Coli=2000/100ml Cl2(ch)=0.011 5 CrIII(ac/ch)=TVS Hg(ch)=0.01(tot) Zn(ac/ch)=TVS E.Coli=630/100ml CN=0.005 NO3=100 CrVI(ac/ch)=TVS Ni(ac/ch)=TVS Cu(ac/ch)=TVS

7. Mainstem of Government Creek from the boundary of the Colorado State Forest to the Aq Life Cold 2 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ch)=100(Trec) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Water + Fish confluence with the Canadian River. Mainstem of Spring Creek from the source to the UP Recreation 2 D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Pb(ac/ch)=TVS Ag(ac)=TVS organics apply confluence with Illinois River. Agriculture pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.0 Cd(ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) F.Coli=2000/100ml Cl2(ch)=0.011 5 CrIII(ac/ch)=TVS Hg(ch)=0.01(tot) Zn(ac/ch)=TVS E.Coli=630/100ml CN=0.005 NO3=100 CrVI(ac/ch)=TVS Ni(ac/ch)=TVS Cu(ac/ch)=TVS Page 13 STREAM CLASSIFICATIONS and WATER QUALITY STANDARDS

REGION: 12 Desi Classifications NUMERIC STANDARDS TEMPORARY g MODIFICATIONS BASIN: Yampa River AND PHYSICAL INORGANIC METALS QUALIFIERS and Stream Segment Description BIOLOGICAL mg/l ug/l

1. All tributaries to the Yampa River, including all wetlands, lakes and reservoirs, which Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS are within the Mount Zirkel, Flat Tops and Sarvis Creek Wilderness Areas. OW Recreation 1a D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Mn(ch)=WS Ag(ch)=TVS(tr) E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS

SO4=WS Cu(ac/ch)=TVS Hg(ch)=0.01(tot)

2a. Mainstem of the Yampa River from the confluence with Wheeler Creek to the Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS confluence with Elkhead Creek, except for segment 2b. Recreation 1a D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Mn(ch)=WS Ag(ch)=TVS(tr) E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS

SO4=WS Cu(ac/ch)=TVS Hg(ch)=0.01(tot)

2b. All lakes and reservoirs tributary to the Yampa River from the source to the Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS confluence with Elkhead Creek, except for those listed in Segment 1. All lakes and Recreation 1a D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS reservoirs tributary to Elkhead Creek from the source to the confluence with the Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS Yampa River. Agriculture F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Mn(ch)=WS Ag(ch)=TVS(tr) E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS

SO4=WS Cu(ac/ch)=TVS Hg(ch)=0.01(tot)

3. All tributaries to the Yampa River, including all wetlands, from the source to the Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS confluence with Elk River, except for specific listings in Segments 1, 4, 5, 6, 7, 8, 13 Recreation 1a D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS and 19. Mainstem of the Bear River, including all tributaries and wetlands from the Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS boundary of the Flat Tops Wilderness Area to the confluence with the Yampa River. Agriculture F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Mn(ch)=WS Ag(ch)=TVS(tr) E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS

SO4=WS Cu(ac/ch)=TVS Hg(ch)=0.01(tot)

4. Mainstem of Little White Snake Creek from the source to the confluence with the Aq Life Cold 2 D.O.=6.0 mg/l CN=0.005 NO3=10 As(ac)=50 Fe(ch)=WS(dis) Ni(ch)=100 All metals are Trec Yampa River. UP Recreation 2 D.O.(sp)=7.0 mg/l S=0.002 Cl=250 Cd(ac)=5 Pb(ac)=50 Se(ch)=20 unless otherwise

Water Supply pH=6.5-9.0 B=0.75 SO4=WS CrIII(ac)=50 Mn(ch)=WS Ag(ac)=100 noted. Agriculture F.Coli=2000/100ml NO2=0.05 CrVI(ac)=50 Mn(ac/ch)=TVS Zn(ac/ch)=2000 E.Coli=630/100ml Cu(ch)=200 Hg(ac)=2.0

5. Mainstem of Chimney Creek, including all tributaries and wetlands, which are not on Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ch)=100(Trec) Cu(ac/ch)=TVS Ni(ac/ch)=TVS National Forest lands, from the source to the confluence with the Yampa River. Recreation 1b D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Agriculture pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS F.Coli=325/100ml Cl2(ch)=0.011 CrIII(ac/ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) E.Coli=205/100ml CN=0.005 CrVI(ac/ch)=TVS Hg(ch)=0.01(tot) Zn(ac/ch)=TVS

6. Mainstem of Oak Creek, including all tributaries and wetlands, from the source to Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS the point of discharge of the Oak Creek wastewater treatment plant. Recreation 1a D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Mn(ch)=WS Ag(ch)=TVS(tr) E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS

SO4=WS Cu(ac/ch)=TVS Hg(ch)=0.01(tot)

7. Mainstem of Oak Creek, including all tributaries and wetlands, from the point of Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ch)=100(Trec) Cu(ac/ch)=TVS Ni(ac/ch)=TVS discharge of the Oak Creek wastewater treatment plant to the confluence with the Recreation 1b D.O.(sp)=7.0 mg/l NH3(ch)=0.05 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Yampa River. Agriculture pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS F.Coli=325/100ml Cl2(ch)=0.011 CrIII(ac/ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) E.Coli=205/100ml CN=0.005 CrVI(ac/ch)=TVS Hg(ch)=0.01(tot) Zn(ac/ch)=TVS

8. Mainstem of the Elk River including, all tributaries and wetlands, from the source to Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS the confluence with the Yampa River, except for those tributaries included in Recreation 1a D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)TVS Segment 1. Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Mn(ch)=WS Ag(ch)=TVS(tr) E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS

SO4=WS Cu(ac/ch)=TVS Hg(ch)=0.01(tot) 9. Deleted. 10. Deleted 11. Deleted Page 14 STREAM CLASSIFICATIONS and WATER QUALITY STANDARDS

REGION: 12 Desi Classifications NUMERIC STANDARDS TEMPORARY g MODIFICATIONS BASIN: Yampa River AND PHYSICAL INORGANIC METALS QUALIFIERS and BIOLOGICAL mg/l ug/l Stream Segment Description

12. All tributaries to the Yampa River, including all wetlands, from the confluence with Aq Life Cold 2 D.O.=6.0 mg/l CN(ac)=0.2 S=0.002 As(ac)=100 Pb(ch)=100 Se(ch)=20 All metals are the Elk River to the confluence with Elkhead Creek, which are not on National UP Recreation 2 D.O.(sp)=7.0 mg/l B=0.75 Cd(ch)=10 Mn(ch)=200 Zn(ch)=2000 Trec unless

Forest lands, except for specific listings in Segments 13a, 13b, 13c, 13d and 13e. Agriculture pH=6.5-9.0 NO2=0.0 CrIII(ch)=100 Ni(ch)=200 otherwise noted. F.Coli=2000/100ml 5 CrVI(ch)=100

E.Coli=630/100ml NO3=100 Cu(ac)=200

13a. Mainstem of Trout Creek, including all tributaries and Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS wetlands, from the source to the confluence with the Yampa Recreation 1a D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec Se(ac/ch)=TVS River, which are not on National Forest lands, except for Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.0 Cd(ch)=TVS ) Ag(ac)=TVS specific listings in Segments 13b and 13c. Agriculture F.Coli=200/100ml Cl2(ch)=0.011 5 CrIII(ac)=50(Trec) Pb(ac/ch)=TVS Ag(ch)=TVS(tr) E.Coli=126/100ml CN=0.005 NO3=10 CrVI(ac/ch)=TVS Mn(ch)=WS Zn(ac/ch)=TVS Cl=250 Cu(ac/ch)=TVS Mn(ac/ch)=TVS

SO4=WS Hg(ch)=0.01(tot)

13b. Mainstem of Foidel Creek, including all tributaries and Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ch)=100(Trec) Fe(ch)=1000(Trec Mn(ac/ch)=TVS wetlands. Mainstem Fish Creek, including all tributaries from Recreation 1a D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) ) Hg(ch)=0.01(tot) County Road 27 downstream to the confluence with Trout Agriculture pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.0 Cd(ch)=TVS Fish Creek Ni(ac/ch)=TVS Creek. Middle Creek and all tributaries, from County Road F.Coli=200/100ml Cl2(ch)=0.011 5 CrIII(ac/ch)=TVS Fe(ch)=1600(Trec Se(ac/ch)=TVS 27 downstream to the confluence with Trout Creek. E.Coli=126/100ml CN=0.005 CrVI(ac/ch)=TVS ) Ag(ac)=TVS Cu(ac/ch)=TVS Foidel Creek and Ag(ch)=TVS(tr) Middle Creek Zn(ac/ch)=TVS Pb(ac/ch)=TVS

13c. Mainstem of Trout Creek from headgate of Spruce Hill Ditch Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ch)=100(Trec) Fe(ch)=1000(Trec Ni(ac/ch)=TVS (approximately 2,500 feet north of where County Road 27 Recreation 1a D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) ) Se(ac/ch)=TVS` crosses Trout Creek) to its confluence with Fish Creek. All Agriculture pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.0 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS tributaries to Trout Creek from the headgate of Spruce Hill F.Coli=200/100ml Cl2(ch)=0.011 5 CrIII(ac/ch)=TVS Mn(ac/ch)=TVS Ag(ch)=TVS(tr) Ditch (approximately 2,500 feet north of where County Road June through E.Coli=126/100ml CN=0.005 CrVI(ac/ch)=TVS Hg(ch)=0.01(tot) Zn(ac/ch)=TVS 27 crosses Trout Creek) to County Road 179 except for February June Cu(ac/ch)=TVS specific listings in 13b. Water Supply through February June through June through

NO3=10 February February Cl=250 As(ac)=50(Trec) Fe(ch)=WS(dis)

SO4=WS CrIII(ac)=50(Trec) Mn(ch)=WS

13d. Mainstem of Dry Creek, including all tributaries and Aq Life Warm 2 D.O.=5.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=100(Trec) Fe(ch)=1000(Trec Se(ac/ch)=TVS Temporary wetlands, from the source to the confluence with the Yampa Recreation 1a pH=6.5-9.0 NH3(ch)=0.06 B=0.75 Cd(ac/ch)=TVS ) Ag(ac/ch)=TVS Modification: River. UP Agriculture F.Coli=200/100ml Cl2(ac)=0.019 NO2=0.0 CrIII(ac/ch)=TVS Pb(ac/ch)=TVS Zn(ac/ch)=TVS Se(ac/ch)=60 E.Coli=126/100ml Cl2(ch)=0.011 5 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS based on CN=0.005 Cu(ac/ch)=TVS Hg(ch)=0.01(tot) uncertainty. Ni(ac/ch)=TVS Effective until 2/28/09

13e. Mainstems of Sage Creek and Grassy Creek, including all tributaries and Aq Life Warm 2 D.O.=5.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=100(Trec) Fe(ch)=1000(Trec Se(ac/ch)=TVS wetlands, from their sources to the confluence with the Yampa River. UP Recreation 2 pH=6.5-9.0 NH3(ch)=0.06 B=0.75 Cd(ac/ch)=TVS ) Ag(ac/ch)=TVS Agriculture F.Coli=2000/100ml Cl2(ac)=0.019 NO2=0.0 CrIII(ac/ch)=TVS Pb(ac/ch)=TVS Zn(ac/ch)=TVS E.Coli=630/100ml Cl2(ch)=0.011 5 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS CN=0.005 Cu(ac/ch)=TVS Hg(ch)=0.01(tot) Ni(ac/ch)=TVS

14. Mainstem of Elkhead Creek, including all tributaries and wetlands, from the Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS boundary of the National Forest lands, to the confluence with the Yampa River. Recreation 1a D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec Se(ac/ch)=TVS Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.0 Cd(ch)=TVS ) Ag(ac)=TVS Agriculture F.Coli=200/100ml Cl2(ch)=0.011 5 CrIII(ac)=50(Trec) Pb(ac/ch)=TVS Ag(ch)=TVS(tr) E.Coli=126/100ml CN=0.005 NO3=10 CrVI(ac/ch)=TVS Mn(ch)=WS Zn(ac/ch)=TVS Cl=250 Cu(ac/ch)=TVS Mn(ac/ch)=TVS

SO4=WS Hg(ch)=0.01(tot) 15. Deleted. 16. Deleted 17. Deleted. Page 15 STREAM CLASSIFICATIONS and WATER QUALITY STANDARDS

REGION: 12 Desi Classifications NUMERIC STANDARDS TEMPORARY g MODIFICATIONS BASIN: Yampa River AND PHYSICAL INORGANIC METALS QUALIFIERS and Stream Segment Description BIOLOGICAL mg/l ug/l

18. Mainstem of the Little Snake River, including all tributaries and wetlands, from Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS the Routt National Forest boundary to the Colorado/Wyoming border. Recreation 1a D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Mn(ch)=WS Ag(ch)=TVS(tr) E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS

SO4=WS Cu(ac/ch)=TVS Hg(ch)=0.01(tot)

19. All tributaries to the Little Snake River, including all wetlands, lakes and Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS reservoirs, which are on National Forest lands in Routt County. Recreation 1a D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch) Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Mn(ch)=WS Ag(ch)=TVS(tr) E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS

SO4=WS Cu(ac/ch)=TVS Hg(ch)=0.01(tot)

20. All tributaries to the Yampa River, including wetlands, above the confluence with Aq Life Cold 1 D.O.=6.0 mg/l NH3(ac)=TVS S=0.002 As(ac)=50(Trec) Fe(ch)=WS(dis) Ni(ac/ch)=TVS Elkhead Creek that are within National Forest boundaries. Recreation 1a D.O.(sp)=7.0 mg/l NH3(ch)=0.02 B=0.75 Cd(ac)=TVS(tr) Fe(ch)=1000(Trec) Se(ac/ch)=TVS Water Supply pH=6.5-9.0 Cl2(ac)=0.019 NO2=0.05 Cd(ch)=TVS Pb(ac/ch)=TVS Ag(ac)=TVS Agriculture F.Coli=200/100ml Cl2(ch)=0.011 NO3=10 CrIII(ac)=50(Trec) Mn(ch)=WS Ag(ch)=TVS(tr) E.Coli=126/100ml CN=0.005 Cl=250 CrVI(ac/ch)=TVS Mn(ac/ch)=TVS Zn(ac/ch)=TVS

SO4=WS Cu(ac/ch)=TVS Hg(ch)=0.01(tot)