COlorado department of public Health and environment
WATER QUALITY CONTROL COMMISSION
5 ccr 1002-33
CLASSIFICATIONS AND NUMERIC STANDARDS
FOR
UPPER COLORADO RIVER BASIN AND
NORTH PLATTE RIVER (PLANNING REGION 12)
REGULATION NO. 33
. . . .

REGION:12

BASIN:  Yampa River	Desig	Classifications	NUMERIC STANDARDS	TEMPORARY
MODIFICATIONS
AND
QUALIFIERS	

Stream Segment Description			PHYSICAL
and
BIOLOGICAL
	INORGANIC
mg/l	METALS
ug/l		
13e.	Mainstems of Sage Creek and Grassy Creek, including all tributaries and wetlands, from their sources to the confluence with the Yampa River.	
UP	Aq Life Warm 2
Recreation N
Agriculture	T=TVS(WS-II)oC
D.O.=5.0 mg/l
pH=6.5‑9.0
E.Coli=630/100ml	NH3(ac/ch)=TVS
Cl2(ac)=0.019
Cl2(ch)=0.011
CN=0.005	S=0.002
B=0.75
NO2=0.05
NO3=100	As(ac)=340
As(ch)=100(Trec)
Cd(ac/ch)=TVS
CrIII(ac/ch)=TVS
CrVI(ac/ch)=TVS
Cu(ac/ch)=TVS	Upper Sage Creek
Fe(ch)=1250
Lower Sage Creek 
Fe(ch)=1000(Trec)
Grassy Creek
Fe(ch)=1000(Trec)

Pb(ac/ch)=TVS
Mn(ac/ch)=TVS
Hg(ch)=0.01(tot)
Ni(ac/ch)=TVS	Se(ac/ch)=TVS
Ag(ac/ch)=TVS
Zn(ac/ch)=TVS	Temporary modification. 
Fe(ch): “existing quality”
(Type iii) for Grassy Creek. Expiration date of 12/31/2013.

Break between Upper and Lower Sage Creek is the west border of Section 18, T5N, R87W.
See section 33.6(4) for iron assessment locations.	

. . . .
33.48	STATEMENT OF BASIS SPECIFIC STATUTORY AUTHORITY AND PURPOSE JUNE 13, 2011 RULEMAKING REGARDING TEMPORARY MODIFICATIONS; EFFECTIVE DATE JANUARY 1, 2012
The provisions of C.R S. 25-8-202(1)(a), (b) and (2); 25-8-203; 25-8-204; and 25-8-402; provide the specific statutory authority for adoption of these regulatory amendments.  The Commission also adopted in compliance with 24-4-103(4) C.R.S. the following statement of basis and purpose.
BASIS AND PURPOSE
The Commission’s decision to delay consideration of nutrient criteria until March 2012 resulted in cancelation of the December 2011 review of temporary modifications.  Accordingly, the Commission considered the expiration dates of all the temporary modifications expiring on or before December 31, 2012 in a written comment rulemaking.  The Commission extended the expiration date of the following temporary modification to December 31, 2013.  It will be reviewed again in a Temporary Modification hearing in December 2012.
Yampa River segment 13e (Fe).