BASIN: Stream Classifications and Water Quality Standards for the Boulder Creek Watershed


	Current Theme: Watershed
	Colorado Department of Health Water Quality Control Commission Stream Classifications and Water Quality Standards for the Boulder Creek Watershed

REGION: 2 and 3	Desig.	Classifications				NUMERIC STANDARDS			TEMPORARY
BASIN: Boulder Creek			PHYSICAL	INORGANIC			METALS		MODIFICATIONS
			and	mg/l			ug/l		AND
Stream Segment Description			BIOLOGICAL						QUALIFICATIONS
1. All tributaries to Boulder Creek,	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
including all lakes, reservoirs, and wetlands,		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)=10(Trec)
within the Indian Peaks Wilderness Area.		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(ac/ch)=TVS	Ag(ch)=TVS(tr)
			E.Coli=126/100ml	CN=0.005	Cl=250	CrVI(ac/ch)=TVS	Mn(ch)=WS(dis)	Zn(ac/ch)=TVS
					SO4 =WS	Cu(ac/ch)=TVS	Hg(ch)=0.01(Tot)
2. Mainstem of Boulder Creek, including all		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
tributaries, lakes, reservoirs, and wetlands, from the		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)=10(Trec)
boundary of the Indian Peaks Wilderness		Water Supply	pH=6.5-9.0	Cl2 (ac)=0.019	NO2 =0.05	Cd(ch)=TVS	Pb(ac/ch)=TVS	Ag(ac)=TVS
Area to a point immediately above the		Agriculture	F.Coli=200/100ml	Cl2 (ch)=0.011	NO3 =10	CrIII(ac)=50(Trec)	Mn(ac/ch)=TVS	Ag(ch)=TVS(tr)
confluence with South Boulder Creek, except			E.Coli=126/100ml	CN=0.005	Cl=250	CrVI(ac/ch)=TVS	Mn(ch)=WS(dis)	Zn(ac/ch)=TVS
for the specific listings in Segment 3 and 12.					SO4 =WS	Cu(ac/ch)=TVS	Hg(ch)=0.01(Tot)
3. Mainstem of Middle Boulder Creek,		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
including all tributaries, lakes, reservoirs, 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)=10(Trec)
wetlands, from the source to the outlet of Barker		Water Supply	pH=6.5-9.0	Cl2 (ac)=0.019	NO2 =0.05	Cd(ch)=TVS	Pb(ac/ch)=TVS	Ag(ac)=TVS
Reservoir.		Agriculture	F.Coli=200/100ml	Cl2 (ch)=0.011	NO3 =10	CrIII(ac)=50(Trec)	Mn(ac/ch)=TVS	Ag(ch)=TVS(tr)
			E.Coli=126/100ml	CN=0.005	Cl=250	CrVI(ac/ch)=TVS	Mn(ch)=WS(dis)	Zn(ac/ch)=TVS
					SO4 =WS	Cu(ac/ch)=TVS	Hg(ch)=0.01(Tot)
4a. Mainstem of South Boulder Creek,		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
including all tributaries, lakes, reservoirs, 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)=10(Trec)
wetlands, from the source to the outlet of Gross		Water Supply	pH=6.5-9.0	Cl2 (ac)=0.019	NO2 =0.05	Cd(ch)=TVS	Pb(ac/ch)=TVS	Ag(ac)=TVS
Reservoir.		Agriculture	F.Coli=200/100ml	Cl2 (ch)=0.011	NO3 =10	CrIII(ac)=50(Trec)	Mn(ac/ch)=TVS	Ag(ch)=TVS(tr)
			E.Coli=126/100ml	CN=0.005	Cl=250	CrVI(ac/ch)=TVS	Mn(ch)=WS(dis)	Zn(ac/ch)=TVS
					SO4 =WS	Cu(ac/ch)=TVS	Hg(ch)=0.01(Tot)
4b. Mainstem of South Boulder Creek,		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
including all tributaries, lakes, and reservoirs,		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)=10(Trec)
from the outlet of Gross Reservoir to South		Water Supply	pH=6.5-9.0	Cl2 (ac)=0.019	NO2 =0.05	Cd(ch)=TVS	Pb(ac/ch)=TVS	Ag(ac)=TVS
Boulder Road, except for specific		Agriculture	F.Coli=200/100ml	Cl2 (ch)=0.011	NO3 =10	CrIII(ac)=50(Trec)	Mn(ac/ch)=TVS	Ag(ch)=TVS(tr)
listings in Segments 4c and 4d.			E.Coli=126/100ml	CN=0.005	Cl=250	CrVI(ac/ch)=TVS	Mn(ch)=WS(dis)	Zn(ac/ch)=TVS
					SO4 =WS	Cu(ac/ch)=TVS	Hg(ch)=0.01(Tot)
4c. Mainstem of Cowdrey Drainage from	UP	Aq Life Warm 2	D.O.=5.0 mg/l	CN=0.2	NO3 =10	As(ac)=50	Cu(ch)=1000	Se(ch)=10	All Metals Trec
the source below Cowdrey Reservoir #2 to		Recreation 1a	pH=6.5-9.0	F=2	Cl=320	Ba(ac)=1000	Fe(ch)=WS(dis)	Ag(ac)=50	unless otherwise
the Davidson Ditch.		Water Supply	F.Coli=200/100ml	NO2 =1.0	SO4 =WS	Cd(ac)=10	Pb(ac)=50	Zn(ch)=5000	noted.
		Agriculture	E.Coli=126/100ml			CrIII(ac)=50	Mn(ch)=WS(dis)

4d. Mainstem of Cowdrey Drainage from	UP	Aq Life Warm 2	D.O.=5.0 mg/l	NH3 (ac)=TVS	S=0.002	As(ac)=50(Trec)	Fe(ch)=WS(dis)	Ni(ac/ch)=TVS
immediately downstream of the Davidson		Recreation 1a	pH=6.5-9.0	NH3 (ch)=0.06	B=0.75	Cd(ac/ch)=TVS	Pb(ac/ch)=TVS	Se(ac/ch)=TVS
Ditch to the confluence with South Boulder		Water Supply	F.Coli=200/100ml	Cl2 (ac)=0.019	NO2 =0.5	CrIII(ac)=50(Trec)	Mn(ac/ch)=TVS	Ag(ac/ch)=TVS
Creek.		Agriculture	E.Coli=126/100ml	Cl2 (ch)=0.011	NO3 =10	CrVI(ac/ch)=TVS	Mn(ch)=WS(dis)	Zn(ac/ch)=TVS
				CN=0.003	Cl=320	Cu(ac/ch)=TVS	Hg(ch)=0.01(Tot)
					SO4 =WS
5. Mainstem of South Boulder Creek from	UP	Aq Life Warm 1	D.O.=5.0 mg/l	NH3 (ac)=TVS	S=0.002	As(ac)=50	Fe(ch)=WS(dis)	Ni(ac/ch)=TVS	All Metals Trec
South Boulder Road to the confluence		Recreation 1a	pH=6.5-9.0	NH3 (ch)=0.06	B=0.75	Cd(ac/ch)=TVS	Pb(ac/ch)=TVS	Se(ac/ch)=TVS	unless otherwise
with Boulder Creek.		Water Supply	F.Coli=200/100ml	Cl2 (ac)=0.019	NO2 =0.5	CrIII(ac)=50(Trec)	Mn(ac/ch)=TVS	Ag(ac/ch)=TVS	noted.
		Agriculture	E.Coli=126/100ml	Cl2 (ch)=0.011	NO3 =10	CrVI(ac/ch)=TVS	Mn(ch)=WS(dis)	Zn(ac/ch)=TVS
				CN=0.005	Cl=250	Cu(ac/ch)=TVS	Hg(ch)=0.01(Tot)
6. Mainstem of Coal Creek, including all	UP	Aq Life Cold 2	D.O.=6.0 mg/l	NH3 (ac)=TVS	S=0.002	As(ac)=50(Trec)	Fe(ch)=300(dis)	Ni(ac/ch)=TVS
tributaries, lakes, reservoirs, and wetlands, from the		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
source to highway 93.		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(ac/ch)=TVS	Ag(ch)=TVS(tr)
			E.Coli=126/100ml	CN=0.2	Cl=250	CrVI(ac/ch)=TVS	Mn(ch)=WS(dis)	Zn(ac/ch)=TVS
					SO4 =WS	Cu(ac/ch)=TVS	Hg(ch)=0.01(Tot)
7a. Mainstem of Coal Creek from highway 93	UP	Aq Life Warm 1	D.O.=5.0 mg/l	NH3 (ac)=TVS	S=0.002	As(ch)=100(Trec)	Fe(ch)=1000(Trec)	Ni(ac/ch)=TVS
to highway 36 (Boulder Turnpike).		Recreation 1a	pH=6.5-9.0	NH3 (ch)=0.06	B=0.75	Cd(ac/ch)=TVS	Pb(ac/ch)=TVS	Se(ac/ch)=TVS
		Agriculture	F.Coli=200/100ml	Cl2 (ac)=0.019	NO2 =0.5	CrIII(ac/ch)=TVS	Mn(ac/ch)=TVS	Ag(ac/ch)=TVS
			E.Coli=126/100ml	Cl2 (ch)=0.011		CrVI(ac/ch)=TVS	Hg(ch)=0.01(Tot)	Zn(ac/ch)=TVS
				CN=0.005		Cu(ac/ch)=TVS
7b. Mainstem of Coal Creek from Highway 36	UP	Aq Life Warm 2	D.O.=5.0 mg/l	NH3 (ac)=TVS	S=0.002	As(ch)=100(Trec)	Fe(ch)=1000(Trec)	Ni(ac/ch)=TVS
to the confluence with Boulder Creek.		Recreation 1a	pH=6.5-9.0	NH3 (ch)=0.06	B=0.75	Cd(ac/ch)=TVS	Pb(ac/ch)=TVS	Se(ac/ch)=TVS
		Agriculture	F.Coli=200/100ml	Cl2 (ac)=0.019	NO2 =0.5	CrIII(ac/ch)=TVS	Mn(ac/ch)=TVS	Ag(ac/ch)=TVS
			E.Coli=126/100ml	Cl2 (ch)=0.011		CrVI(ac/ch)=TVS	Hg(ch)=0.01(Tot)	Zn(ac/ch)=TVS
				CN=0.005		Cu(ac/ch)=TVS
8. All tributaries to South Boulder Creek, including	UP	Aq Life Warm 2	D.O.=5.0 mg/l	NH3 (ac)=TVS	S=0.002	As(ch)=50(Trec)	Fe(ch)=WS(dis)	Ni(ac/ch)=TVS
all lakes, reservoirs, and wetlands, from South		Recreation 1a	pH=6.5-9.0	NH3 (ch)=0.10	B=0.75	Cd(ac/ch)=TVS	Fe(ch)=1000(Trec)	Se(ac/ch)=TVS
Boulder Road to the confluence with Boulder		Agriculture	F.Coli=200/100ml	Cl2 (ac)=0.019	NO2 =0.5	CrIII(ac)=50(Trec)	Pb(ac/ch)=TVS	Ag(ac/ch)=TVS
Creek and all tributaries to Coal Creek, including			E.Coli=126/100ml	Cl2 (ch)=0.011	NO3 =10	CrVI(ac/ch)=TVS	Mn(ac/ch)=TVS	Zn(ac/ch)=TVS
all lakes, reservoirs, and wetlands, from Highway				CN=0.005	Cl=250	Cu(ac/ch)=TVS	Mn(ch)=WS(dis)
93 to the confluence with Boulder Creek.					SO4 =WS		Hg(ch)=0.01(Tot)
9. Mainstem of Boulder Creek from a point		Aq Life Warm 1	D.O.=5.0 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		Recreation 1a	pH=6.5-9.0	NH3 (ch)=0.06	B=0.75	Cd(ac/ch)=TVS	Fe(ch)=1000(Trec)	Se(ac/ch)=TVS
South Boulder Creek to the confluence with		Water Supply	F.Coli=200/100ml	Cl2 (ac)=0.019	NO2 =0.5	CrIII(ac)=50(Trec)	Pb(ac/ch)=TVS	Ag(ac/ch)=TVS
Coal Creek.		Agriculture	E.Coli=126/100ml	Cl2 (ch)=0.011	NO3 =10	CrVI(ac/ch)=TVS	Mn(ac/ch)=TVS	Zn(ac/ch)=TVS
				CN=0.005	Cl=250	Cu(ac/ch)=TVS	Mn(ch)=WS(dis)
					SO4 =WS		Hg(ch)=0.01(Tot)
10. Mainstem of Boulder Creek from the	UP	Aq Life Warm 1	D.O.=5.0 mg/l	NH3 (ac)=TVS	S=0.002	As(ac)=50(Trec)	Fe(ch)=WS(dis)	Ni(ac/ch)=TVS
confluence with Coal Creek to the confluence		Recreation 1a	pH=6.5-9.0	NH3 (ch)=0.06	B=0.75	Cd(ac/ch)=TVS	Fe(ch)=1000(Trec)	Se(ac/ch)=TVS
with St. Vrain Creek.		Water Supply	F.Coli=200/100ml	Cl2 (ac)=0.019	NO2 =0.5	CrIII(ac)=50(Trec)	Pb(ac/ch)=TVS	Ag(ac/ch)=TVS
		Agriculture	E.Coli=126/100ml	Cl2 (ch)=0.011	NO3 =10	CrVI(ac/ch)=TVS	Mn(ac/ch)=TVS	Zn(ac/ch)=TVS
				CN=0.005	Cl=250	Cu(ac/ch)=TVS	Mn(ch)=WS(dis)
					SO4 =WS		Hg(ch)=0.01(Tot)
11. All tributaries to Boulder Creek from a	UP	Aq Life Warm 2	D.O.=5.0 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		Recreation 1a	pH=6.5-9.0	NH3 (ch)=0.10	B=0.75	Cd(ac/ch)=TVS	Fe(ch)=1000(Trec)	Se(ac/ch)=TVS
South Boulder Creek to the confluence with		Agriculture	F.Coli=200/100ml	Cl2 (ac)=0.019	NO2 =0.5	CrIII(ac)=50(Trec)	Pb(ac/ch)=TVS	Ag(ac/ch)=TVS
St. Vrain Creek, except for specific			E.Coli=126/100ml	Cl2 (ch)=0.011	NO3 =10	CrVI(ac/ch)=TVS	Mn(ac/ch)=TVS	Zn(ac/ch)=TVS
listings in Segments 5 and 7.				CN=0.005	Cl=250	Cu(ac/ch)=TVS	Mn(ch)=WS(dis)
					SO4 =WS		Hg(ch)=0.01(Tot)
12. Boulder Reservoir and Coot Lake.		Aq Life Warm 1	D.O.=5.0 mg/l	NH3 (ac)=TVS	S=0.002	As(ac)=50(Trec)	Fe(ch)=WS(dis)	Ni(ac/ch)=TVS
		Recreation 1a	pH=6.5-9.0	NH3 (ch)=0.06	B=0.75	Cd(ac/ch)=TVS	Fe(ch)=1000(Trec)	Se(ac/ch)=TVS
		Water Supply	F.Coli=200/100ml	Cl2 (ac)=0.019	NO2 =0.5	CrIII(ac)=50(Trec)	Pb(ac/ch)=TVS	Ag(ac/ch)=TVS
		Agriculture	E.Coli=126/100ml	Cl2 (ch)=0.011	NO3 =10	CrVI(ac/ch)=TVS	Mn(ac/ch)=TVS	Zn(ac/ch)=TVS
				CN=0.005	Cl=250	Cu(ac/ch)=TVS	Mn(ch)=WS(dis)
					SO4 =WS		Hg(ch)=0.01(Tot)
For an explanation of the stream classification system see the BASIN discussion on applicable water quality standards . Explanation of table abbreviations and additional information, see Regulation 38 at http://www.cdphe.state.co.us/op/regs/waterqualityregs.asp.

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