PERMFILE61538

• Permit No: C1980005A
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Doc Name: NPDES PERMIT
• Section_Exhibit Name: TAB 7 APPENDIX 7-5
• Media Type: D
• Archive: Yes

COLORADO DEPARTMENT OF PUBLIC HEALTH AND ENVIRONMENT, Water Quality Comrol Division
Rationale -Page 2, Permit No. CO-0000221
G. Discharge Points:
Table 11-I -Discharge Points
I/I.
OrufaU Wastewater Source Avg Flow, Daily Mar 10-yr124-hr.. Recciving Water
MGD Flow, MGD E~•em Vol
002 SR, SS 0.3316 7.4233 3.8900 MG Little Grassy Ck, rrib to
Grassy Creek
003 SR, TW 0.0903 0.3557 0.1343 MG Little Grassy Ck, trib to
Grassy Creek
D04 SR, SS 0.1948 4.6844 2.1776 MG Cow Camp Ck, trib !o
Fish Creek
005 SR, SS 0.0165 0.7978 1.5119 MG Unnamed Trib to Dry
Creek
006 SR, SS, MW 0.0543 1.1563 4.1350 MG Unnamed Trib to Dry
Creek
008 SR, SS, MW 0.1782 2.1600 1.8704 MG Bond Ck, tnb to Fish
Creek
009 SR 0.0422 0.1584 /.1274 MG Unnamed Trib to Sage
Creek
010 SR, SS, MW 0.181' 3.432* 5.9631 MG Armand Draw, Crib to
Grassy Creek
011 SR, SS, MW 0.032* 0.963* 0.8277 MG Grassy Creek
SR means Surface Runoff, SS means Spoils Spring, MW means Mine Water, TW means Truck Wash
• Design volumes
RECEIVING STREAM
A. /dentification, Classification and Standards
C 1
J

Identification: Discharges to Grasn~ Creek, Drv Creek and Sage Creek, Segment l2 of the Yampa River Sub-basin
of the Upper Colorado River Basin and to Fish Creek, Segment 136 of the Ydmpa River Sub-basin of the Upper
Colorado River Basin.
Classification: Segment 12 is classified jot the jollowing uses: Use Protected; Recreation, Class 2; Aquatic Life,
Class 2 (cold); Agriculture. Segment !36 is classified for the following uses: Recreation, Class 1: Aquatic Life,
Clans 1 (cold); Agriculture.
3. Numeric Standards: The statuiards xhich leave been assigned in accordance with the classificationu for Segmem 12
can be found in the Classifications and Numeric Standards jar the Upper Colorado River Basin 3.3.0 (5 CCR
1002-8), as amended December Il, 1995. There are no metals standards for this Segmem.
The complete list of standards which have been assigned in accordance with the classification for segment 136 can
also be found in the Classifications and Numeric Standards for the Upper Colorado River Basin 3.3.0 (5 CCR
1002-8), as amended December I1, 1995. Tlie following numeric standards which have been assigned in
accordance with the above classifications will be used to develop effluent limitations.
Physical and Bioloeical
pH = 6.5 - 9.0 s. u.
•
Metals Criteria Standard Ana tical Method
Iron (Fe) Chronic 1000 tig/f Total Recoverable