ANNA S MINE COMPLEX PERFORMANCE
June 2004 - April 2007
The complex is inspected monthly and sampled semi-annually by the Babb Creek Watershed Association. Sampling includes the three AMD discharges, the effluents from each VFP, and the final effluent of the Anna S and Hunters Drift systems. The results have been good. All discharges from the VFPs have been alkaline with low metal concentrations. No signs of decline or permeability loss are evident.
The average results of the sampling program are shown below.
Average results for Anna S Passive Treatment Complex
June 2004 – April 2007
|
Flow
gpm
|
pH |
Alk
mg/L
|
Acid
mg/L
|
Al
mg/L
|
Fe
mg/L
|
Mn
mg/L
|
SO4
mg/L
|
Anna 1 |
357 |
3.0 |
0 |
184 |
10.8 |
7.6 |
8.1 |
367 |
Anna 2 |
63 |
3.5 |
0 |
64 |
3.3 |
0.8 |
6.2 |
175 |
VFP 1 effluent |
96 |
7.3 |
182 |
-118 |
0.5 |
1.4 |
7.9 |
349 |
VFP 2 effluent |
81 |
7.1 |
167 |
-97 |
0.6 |
2.8 |
8.2 |
325 |
VFP 3 effluent |
106 |
7.0 |
143 |
-86 |
0.5 |
1.7 |
8.1 |
346 |
VFP 4 effluent |
118 |
7.1 |
163 |
-108 |
0.5 |
1.1 |
7.1 |
375 |
Anna S sys final |
397 |
7.5 |
143 |
-93 |
0.4 |
1.1 |
5.5 |
352 |
|
|
|
|
|
|
|
|
|
Hunters Drift |
385 |
2.8 |
0 |
316 |
21.3 |
21.1 |
5.7 |
471 |
VFP 5 effluent |
93 |
7.0 |
202 |
-132 |
0.6 |
4.7 |
4.0 |
446 |
VFP 6 effluent |
92 |
7.1 |
228 |
-177 |
0.5 |
6.7 |
3.8 |
424 |
VFP 7 effluent |
94 |
7.1 |
220 |
-146 |
0.5 |
5.0 |
4.8 |
413 |
VFP 8 effluent |
94 |
7.0 |
209 |
-144 |
0.5 |
7.1 |
5.2 |
421 |
Hunters sys final |
382 |
7.7 |
172 |
-132 |
0.5 |
0.5 |
1.7 |
406 |
|