HYDRO27727

• Permit No: M1988112
• IBM Index Class Name: Hydrology
• Doc Date: 5/11/2006
• Doc Name: April 2006 Monthly Report
• From: Battle Mountain Resources Inc.
• To: DMG
• Permit Index Doc Type: Correspondence
• Media Type: D
• Archive: No

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BATTLE MOUNTAIN RESOURCES, INC.
May 09, 2006
Mr. Allen Sorensen
State of Colorado
Division of Minerals and Geology
1313 Sherman Street, Room 215
Denver, CO 80203
Re: Battle Mountain Resources Inc.
San Luis Project
CMLRB Permit No. M-88-112
tl~pril 2006 Monthly Report
Dear Mr. Sorensen:
MAY 11 ~
~SIUg g ~ Ninety): and Geology
The following summarizes monitoring and site activities at the Battle Mountain Resources Inc.
(BMR[), San Luis Project for the month of April 2006.
Surface and ground water monitoring and analysis were completed for all required sites during
the month per the terms and conditions of the TR-32 Quality Assurance and Quality Control
(Q~QC) Plan.
Vacuum on the tailing lysimeters was verified on April 26`", no water was present for sampling
and subsequent analysis.
Depths to water were collected for the tailing impoundment main embankment piezometers and
the West Pit and tailings embankment monitoring wells on Apri127'". April tailing impoundment
piezometer measurements identified these installations were either dry or contained less than 12
inches of water as illustrated in Table 2. Tables 1 and 2 below identify the depth to water
measurements collected for each of the site monitoring wells, piezometers and lysimeters as
required by the terms and conditions of the TR-32 QA/QC plan.
The tailing impoundment collection pond underdrain flow was pumped intermittently during the
month to minimize the collection pond level. The leak detection system was measured on April
26`". The April tailings pond underdrain flow average was d3.46 gpm and a total of 780 gallons of
water was excavated from the leak detection system yielding a monthly average of 27.86 gpad.
During April, the Wes[ Pit water treatment plant operated efficiently discharging a total of
7,522,500 gallons (23.09 acre-feet) of water to Rito Seco Creek and a total of 543,000 gallons
(l .67 acre-feet) of water was transferred from the water treatment plant to the tailings
impoundment. Seepage along Rito Seco Creek remained dry during the month.
P.O. Box 310 San Luis, Colorado 81152-0310 [phone] Fax [phone]