2011-03-31_REVISION - M1977493 ‎(3)‎

• Permit No: M1977493
• IBM Index Class Name: REVISION
• Doc Date: 3/31/2011
• Doc Name: Pre-Hearing Statement
• From: MLRB
• To: DRMS
• Type & Sequence: AM6
• Email Name: ECS
• Media Type: D
• Archive: No

CLIMAX PRE-HEARING STATEMENT
AM-06 APPLICATION, PERMIT NO. M-1977-493
MARCH 31, 2011
Ex.79 8/5/02 Sampling and Geochemical Analysis of Robinson Lake
Sediment and Basal Soils and Monitoring Well Water Samples prepared
by American Geological Services.
d. Robinson Lake Seepage Pump System. As discussed
above, Climax was contractually obligated to install a seep collection and return system
below Robinson Lake in its 1998 purchase agreement with the Eagle Park Reservoir
Company.26 This system is located near the toe of Robinson Dam and consists of a
concrete bedrock cutoff wall, a collection pond, and a pump system that conveys
collected seepage water over Robinson Dam and discharges into Robinson Lake. The
current capacity of the installed pumps is more than capable of handling any increase in
seepage that might occur. Mr. Maly may testify about the details of the Robinson Lake
Seepage Pump System. Exhibits discussing the water quality at Robinson Lake and the
capacity and design of the pump system include:
• Ex. 67 at CM0001602, 1604-1623, 11/20/1996 ltr from Climax to
Division Re: Final certification of construction of cutoff wall and
pumpback station below Robinson and accompanying materials;
• Ex. 67 at CM0001603, 12/20/1996 ltr from Division to Climax accepting
certification of wall and pumpstation;
• Ex. 67 at CM0001593, 1579-1592, 8/25/20001tr from Climax to Division
alerting Division to seepage upgrades and accompanying materials;
• Ex. 67 at CM0001599, 9/17/2001 ltr from Climax to Division with final
construction certification re: seep system upgrades;
• Ex. 67 at CM0001600-160, 8/6/01 S. Maly certification to Climax re:
final construction of seep system; and
• Ex. 92, 3/27/09 report by AMEC Earth & Environmental Inc., Climax
Molybdenum Company Robinson Lake Seepage and Stability Evaluation.
e. 4 Dam Seepage Collection and Pump Station. 4 Dam is
the Eagle Park Reservoir Dam. The 4 Dam Seepage Collection and Pump Station
collects seepage water at the toe of 4 Dam, conveys this water around the south side of
Eagle Park Reservoir, and discharges into Robinson Lake, thus preventing seepage from
Eagle Park Reservoir into the Eagle River. This system was certified by the Division as
an EPF, and subsequent improvements to the system have also been certified by the
Division. Mr. Maly may testify about details of the 4 Dam Seepage Collection and Pump
26 See Ex. 18 at 3, CM0000882.
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