|
Logan Wash Mine Annual Report
<br />Permit No. M- 1977 -424
<br />a compliance monitoring well until final permit closure. Well LWCW -IA is sampled for water
<br />quality on a semi - annual basis.
<br />Wells LW -108, LW -1 12, and LW -242 were abandoned in 2005 in accordance with Colorado
<br />Division of Water Resources rules. The other 4 wells, LW -32, LW -45, LW -1 16, and LW -22,
<br />remain in place in the case they may be of value in the evaluation of mine closure investigations.
<br />Casing access and downhole conditions are unknown for wells LW -32, LW -45, and LW -116.
<br />Well LW -22 has been accessed in the past for monitoring. Reconnaissance to date has not
<br />revealed any other monitoring wells within the permit area and the Logan Wash drainage.
<br />Reconnaissance for wells located outside the permitted area in distant drainages was conducted in
<br />past reporting periods. Wells LW -102 and LW -243 were located in Smith Gulch, Well LW -103
<br />was located in Kelly Gulch, and Well LW -104 was located in Riley Gulch. Well LW -121,
<br />apparently constructed in Bowdish Gulch, was not located after a thorough search and is assumed
<br />abandoned. Wells LW -102, LW -104 and LW -243 were abandoned in 2007. Table 3 shows the
<br />status of well abandonment as of this reporting period.
<br />2.4 Status Summary
<br />Reclamation areas released of warranty by DRMS include: Areas 5, 7, 21, and 22, and areas B1,
<br />B4, B6, B9, B 10, and B 1 1 (B areas refer to Logan Wash Road realignments) on September 30`h,
<br />1986; and areas 6, 8, 9, 12, 14, 15, 16, 17, 19, 20 and a portion of Area 13 (roads) on January 12`h,
<br />2006.
<br />Areas in a state of reclamation (revegetated) but not submitted for release to DRMS in the permit
<br />include Areas 1, 2, 3, 4, 10, and the 0.65 acre Soil Barrow Area, portions of Area 13, and road
<br />Areas B2, B3, B7 and B8. Areas 1 through 4 include the Upper and Lower Mine Dumps (face
<br />areas), Upper Mine Bench, Lower Mine Bench, and the Research Mine Bench and Dump,
<br />respectively. Area 10 is the former Helo Pad. Area 13 is Miscellaneous Access Roads.
<br />Area 1, the Upper and Lower Mine Dump faces (13.36 acres) were revegetated during 2003-
<br />2005. Area 2, the Upper Mine Bench (0.74 acres) was revegetated in 2004 and 2005. Area 4, the
<br />Research Mine Bench (2.75 acres) and Dump (1.51 acres), Area 10, the former Helo Pad (0.24
<br />acres), and the Upper Bench Road and Lower Access Road areas of Area 13 were revegetated in
<br />the fall of 2005. However, cattle grazing and dry conditions prevented the lower portion of the
<br />Lower Access Road from revegetating. This was not reseeded as the road is now being used to
<br />monitor Well LWCW -IA on a regular basis.
<br />Area 2' ) is the Evaporation Pond and Pipeline. The portion of Area 23 that has been revegetated is
<br />limited to the retort water pipeline. The portion of Area 23 not revegetated or reclaimed is the
<br />Settling Pond and Evaporation Pond. According to the 1985 annual report, the original disturbed
<br />acreage of Area 23 was 14.87 acres, 5.07 acres of which was reclaimed before 1985, leaving 9.8
<br />acres remaining to be reclaimed. Because the pond was not formally added to the permit until
<br />2008, no reclaimed acreage has been released.
<br />Area 13, Miscellaneous Access Roads (Table 2), includes a number of older roads that have been
<br />reclaimed. In this report the Mine Bench and Portal roads referred to in Table 2 consist of the
<br />Lower Access Road (1.0 acres), Upper Access Road (5.3 acres), Upper Bench Road (1.4 acres not
<br />including bench), and Lower Bench Road (0.9 acres not including bench).
<br />The upper segment of the Lower Access Road, which had been impacted from a debris flow off
<br />the Lower Dump in 2004 was successfully revegetated in 2005, whereas the lower segment of the
<br />Western Water & Land, Inc. 4
<br />
|