2008-07-15_REPORT - M1988044

• Permit No: M1988044
• IBM Index Class Name: REPORT
• Doc Date: 7/15/2008
• Doc Name: Annual Report
• From: SES
• To: DRMS
• Permit Index Doc Type: Annual Reclamation Report
• Email Name: AJW
• Media Type: D
• Archive: No

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deposit until the mining limit is reached or the deposit ends. Many of the areas that were
' previously mined had no remaining sand present and were completely backfilled and graded.
' A. Depth of backfilling - With the large amount of overburden and soil as well as waste
from processing the low grade sand that has been mined recently, backfilling was so
great in many areas not only did the original topographic configuration essentially
return, but the elevation differences with the original were also small. Normally, there
would be more difference in elevation, but with so much low grade sand being
removed, not a great deal of volume difference occurred. As a result, when all the
useless material is replaced it results in almost a restoration of the original surface
form.
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' B. Material used in backfilling - Most of the backfilling done has used overburden
and subsoils stripped from the site where the filling is being done or at least sites that
were near enough to the backfilling that it is still considered to be original material.
This is consistent with the method of operation described in the plans. Other sources
of material include wash fines from processing plant pond cleaning.
' C. Maximum, minimum, and average slopes - Finished slopes in all the backfilled
graded and topsoiled areas are rarely even close to the 5:1 limit. Most are in the 7:1 to
' 15:1 or less steep range. The average is estimated at about 8:1.
D. Deviation from original elevation for new backfilled land - As mentioned above, in
' areas reclaimed this year, the deviations from the original elevation amounts to only a
few feet and when compared to the original topography map it is hard to even
determine how much mining was actually done. No actual measurements were taken
prior to mining as most of these areas are much older and pre-amendment.
3. Processing facilities - Nothing has actually changed here.
4. Access corridors - No change in access corridors.
5. New soil and overburden stockpiles - Due to the general lack of mining activity in the last
year and restriction to existing disturbances, no new stockpiles were created. Most of the
older stockpiles were removed and used in reclamation.
RECLAMATION ACTIVITY IN THE LAST YEAR:
1. Climatic summary ofprevious year - So far, 2008 has been one of the driest years on
record and is on track to possibly be the driest year on record. As of July 14, 3.26" of
precipitation has been received which is a departure of -5.70" from the 8.96" that, on the
average, is received by this date. Compared to 2007, it is about twice as dry at this point. By
July 14 in 2007 a total of 6.45" had been received (2008 = 50.5% of 2007). This pattern is not
only present in Denver, but a similar pattern is evident all along the east side of the Rockies.
Only the far eastern part of Colorado seems to have escaped the full brunt' of this dry spell.
Status report for 2007 (July 15, 2007) Page 6 of 10