2010-08-31_REPORT - M1977285

• Permit No: M1977285
• IBM Index Class Name: REPORT
• Doc Date: 8/31/2010
• Doc Name: BLM Inspection Reports
• From: BLM
• To: Denison Mines
• Inspection Date: 8/18/2010
• Email Name: RCO
• Media Type: D
• Archive: No

USDA
Dolores Public Lands Office
USDA Forest Service 29211 Highway 184 USDI Bureau of Land Management
San Juan National Forest Dolores, CO 81323 San Juan Center
Dolores Ranger District Ph [phone] Fax [phone] Dolores Field Office
hftp://www.fs.fed.us/r2/sanjuan http://www.co.blm.gov
Memorandum: Inspection Report Memo for Denison Mines' Sunday Mines Complex.
Date of Inspection: 08/18/2010
People Present: James Blair: DPLO Geologist; Danny Flannery: Denison Permitting Specialist
To: Steve Beverlin, Field Manager
From: James Blair (preparer)
Purpose
The purpose of this inspection was to verify that the idled mine sites were incompliance with
their approved plans of operation, and in general were clean, that storm water controls were
functioning, and to look for evidence of seeps at the toe of each dump which might indicate that
there is substantial percolation on the development rock piles.
Summary
The inspection covered the plans of operations for the Topaz and West Sunday (COC-52049),
and Sunday, St. Jude, and Carnation Mines (COC-53227), and the notice covering a single vent
hole associated with the Topaz mine (COC-70791).
Conditions during the inspection were dry and sunny with a few clouds. Frequent monsoonal
rainstorms over the previous month resulted in a lot of moisture in the area, and it appeared that a
heavy rainfall event must have occurred either the previous night or night before that. Standing
water was observed in low spots on all of the waste rock piles, and all of the storm water
retention ponds were holding water, some were nearly full, however there was no evidence of
blowouts, and the storm water controls appeared to be functioning as designed.
I walked the entire toe of each dump looking for seeps developed at the contact between waste
rock and the underlying native ground. I saw no vegetation such as tamarisk, nettles, willow,
mosses, or other wetland loving vegetation that would develop around a long-term seep. All
vegetation observed was and pinion-juniper-rabbit brush-sage and grasses typical of and
conditions. Because of the frequent recent rainfall events, one cannot say with absolute certainty
that there are no seeps, but most of the standing water at the base of the dumps appears to be
storm water runoff, and not from percolation coming out of the toe of the dump.
Junk and trash was observed in a few sites, particularly near the base of the Sunday waste dump.
A fissure approximately 50 feet long and 1-2 inches wide was observed approximately 10 feet
back from the crest of the Topaz mine. No vertical offset was observed on this fissure. It may

FS--6200-12a