2008-03-31_PERMIT FILE - C1980007A ‎(34)‎

• Permit No: C1980007A
• IBM Index Class Name: Permit File
• Doc Date: 3/31/2008
• Doc Name: 2.04-51 Thru 2.04-113
• Section_Exhibit Name: 2.04.7 Hydrology Description
• Media Type: D
• Archive: Yes

West Elk Mine
•
•

Table 18,
Pre-Mining Exceedances of Colorado Water Quality Standards for Surface Water

Parameter
Std.* Minnesota Creek
Lower (USGS)
Gaging Station Minnesota Creek
Upper Flume Lower Dry
Fork Upper Dry
Fork Lick
Creek
mg/L Conc.
mglL Date Conc.
mg/L Date Conc.
mg/L Date Conc.
mg/L Date Conc.
mg/L Date
Total iron 1.0 11.00 4/5/88 1.09 2/13/83 3.97 6/20/78 1.15 6/6/80 1.61 6/26/79
9.30 617188 50.3 4/5/88 2.81 6/15182 8.75 6/3/81 7.55 6/5/80
4.31 5/2/89 3.25 6/7/88 3.80 4/5/88 2.91 8/6/82 2.90 612/81
1.70 6/6/89 3.53 5/3/89 26.8 617/8a 6.20 6/7/88 2.42 6/17/82
6.48 4/12190 1.42 616/89 2.65 1018188 3.17 5/2/89 5.32 2/12/83
1.70 6/2190 1.22 4/12/90 3.14 5/3/89 5.60 6/6/89 1.54 617/88
8.90 8/6/90 1.03 6/2/90 2.32 6/6/89 1.62 915/89 2.75 5/3/89
82.00 5/8191 14.7 5/8191 1.74 9/6/89 2.33 4/12/90 6.60 6/6/89
3.10 6/10/91 1.98 6/10/91 8.40 8/6/90 1.71 6/2/90 1.47 4/12/90
11.70 5/4/92 6.5 5/4192 84.00 5/8/91 6.00 8/6/90 1.71 612/90
1.38 6/2/92 2.77 6/2/92 5.95 6110/91 5.38 5/6/90 4.25 518/91
16.10 4/26/93 14.6 4126/93 1.45 9/18/91 11.00 5/5/92 1.38 6/10191
2.43 6/8/93 3.53 6/8/93 5.30 5/4/92 1.67 6/2/92 5.14 5/4/92
1.15 9/6193 1.19 9/6/93 2.56 9/7192 1.77 9/7/92 10.10 6/2/92
17.20 4/29/93 4.49 5/3/93 7.11 4/27/93 .
183 9/6/93 1.01 6/8/93
Dissolved
Iron 0.3 0.56 6/26179
Total Mn 1 1.83 5/8/91 46.40 10/8/81
2.40 5/8/91
H 6.5-9.0 6.0 4/5/88 9.3 10/6/82 5.6 6/7/88 6.1 10/8/88
5.6 6/7/88 9.3 9/6/89
9.9 6/6/89 5.9 6/2/90
5.8 6/2190
6.2 816/90

Std' N. For
Above M k Gunn.
ine South
Prong Horse
Creek E. Fork Minn. Above
S. Prong
Parameter mg/L Conc.
mg/L
Date Conc.
mg/L
Date Conc

mg/L
Date Conc.
mg/L
Date
Total iron 1.0 2.62 6/19!78 1.4 6/22117 1.6 6/22177 1.8 6/221778
2.85 6/4/80
1.05 6/1/81
1.14 6/13/82
1.01 6/6/84
1.01 4/6/88
1.06 617/88
1.35 5/2/89
2.90 5/7/91
1.48 5/5/92
5.82 4/26/93
3.40 6/7/93
Dissolved
i iron 0.3 0.38 6/1/81 0.36 9/28/77 0.78 6/22/77 0.83 I 6/26179
Total Mn 1 3.20 1018/81
pH 6.5-9.0
Notes
These standards apply to the mainstem of North Fork from the outlet of the Paonia Reservoir to the Farmer's Ditch diversion. These are the
most restrictive applicable standards for the area.
2.04-107 Revised November 2004 PRIG; Rev.,4pril 2006 PRIG: Sep. 2007PR12; Feb. 2008 PR12