REGULATION NO. 33 
CLASSIFICATIONS AND NUMERIC STANDARDS FOR 
upper colorado river basin and
north platte river (planning region 12)
. . . .
33.6 	TABLES
. . . .

STREAM CLASSIFICATIONS and WATER QUALITY STANDARDS
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 12/31/2014.

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.	

33.49	STATEMENT OF BASIS SPECIFIC STATUTORY AUTHORITY AND PURPOSE DECEMBER 10, 2012 RULEMAKING; FINAL ACTION JANUARY 14, 2013 EFFECTIVE DATE JUNE 30, 2013
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
Pursuant to the requirements in the Basic Standards (at 31.7(3)), the Commission reviewed the status of temporary modifications scheduled to expire before December 31, 2014, to determine whether the temporary modification should be modified, eliminated or extended.  
Temporary modifications of 3 standards on 3 segments were reviewed.  The Basic Standards Statement of Basis for the 2010 hearing records the Commission’s intent regarding temporary modifications. (see 31.48 at I.A)
Since temporary modifications have no impact on other aspects of Colorado’s water quality management program such as the 303(d) list, the Non-point Source Program or the Total Maximum Daily Load (TMDL) Program, it is fitting that temporary modifications only be used where there are permitted discharges that would face unreasonable consequences in the absence of a temporary modification (e.g., a permit).
The Commission took no action on the temporary modifications on the following segments which are receiving waters for permitted discharges.  These temporary modifications will expire 12/31/2013.  
Eagle River segments 8 and 9a 
Grassy Creek, Yampa River segment 13e:  Seneca Coal Company proposed extending the temporary modification for iron for Grassy Creek. The Commission considered Seneca’s plan to eliminate the need for the temporary modification. Seneca Coal is working to resolve uncertainty and is on schedule to address this segment at the regularly scheduled Basin hearing (June 2014). The Commission extended the expiration date to 12/31/2014, to coincide with the next basin review.
PARTIES TO THE RULEMAKING HEARING
1.	City of Pueblo
2.	Seneca Coal Company
3.	Tri-State Generation and Transmission Association	
4.	Eagle River Water and Sanitation District
5.	Board of County Commissioners for the County of Gunnison, Colorado
6.	Colorado Parks and Wildlife
7.	High Country Citizens’ Alliance
8.	Bill Thiebaut, DA for 10th Judicial District and the Office of the DA for the 10th Judicial District
9.	City of Colorado Springs
10.	Town of Crested Butte
11.	Upper Gunnison River Water Conservancy District
12.	U.S. Energy Corp.
13.	Gunnison County Stockgrowers Association, Inc.
14.	Environmental Protection Agency
15.	Cherokee Metropolitan District
16.	Fountain Sanitation District
17.	Lower Fountain Metropolitan Sewage Disposal District
18.	Monument Sanitation District
19.	Palmer Lake Sanitation District
20.	Town of Monument
21.	Academy Water and Sanitation District
22.	Tri-Lakes Wastewater Treatment Facility
23.	Town of Palmer Lake
24.	Woodmoor Water and Sanitation District No. 1
25.	Upper Monument Creek Regional Wastewater Treatment Facility