GENERAL46636

• Permit No: C1982055
• IBM Index Class Name: General Documents
• Doc Date: 2/9/1990
• Doc Name: Midterm Review Findings Document
• Permit Index Doc Type: Findings
• Media Type: D
• Archive: No

a. Channelizing the inlet flow from the pile. This will
decrease the sediment load and increase the capacity of the
pond.
b. Installation of a baffle or other structures along the
channel from the pile to the se d. pond, or within the pond.
This would increase the detention time of the sediment pond.
c. Cleaning the sediment pond on a regular basis before it
reaches the 60% capacity level.
Reestablish terraces on the outslopes of the refuse disposal
embankment.
e. Re-shape and stabilize the inslopes of the sediment pond on a
regular basis.
Watershed diversion ditch #1, located above the northern edge of
refuse disposal area Section B (Map #12) shows a design flow for
the 100-year diversion of 19.66 cfs. The 12" culvert that is in
place along the light use road as a part of the diversion was not
included in the approved design and was not referenced in the
narrative. Based on our calculations, the capacity fora culvert
with 12" diameter is approximately 3.87 cfs, making it undersized
for the flow in this diversion. The Division is requesting the
mine to revise the plan for this area to install a culvert or a
ditch that is properly sized to safely pass the 100-year 24-hour
event. Map #12 should properly reflect this design change.
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3. The Division also requires the mine to properly document in the
permit application that the sediment pond is adequately sized to
accommodate all surface and mine water discharges.
Status of Stipulations
Stipulation 1:
PRIOR TO EXPANDI~ THE COAL PROCESSING WASTE PILE INTO THE UNDISTURBED
AREA ABOVE AND EAST OF THE HELEN MINE PORTALS, ENERGY FUELS MINING
COMPANY WILL DEMONSTRATE THAT THE NON-TOXIC VOLUME OF MATERIAL PROPOSED
TO BE TAKEN FROM THIS AREA FOR USE IN RECLAIMING THE WASTE PILE IS
ACTUALLY AVAILABLE. THE AREA WILL BE SAMPLED TO A DEPTH OF FIVE FEET AT
LOCATIONS ACCEPTABLE TO THE DIVISION. THE SAMPLES WILL BE COMPOSITED IN
REPRESENTATIVE FASHION AND THEN ANALYZED FOR PH, EC, SAR, TEXTURE, AND
PERCENT ROCK FRAGMENTS.
THE RESULTS OF THE ANALYSES WILL BE PROMPTLY FURNISHED TO THE DIVISION.
SHOULD THESE NOT DEMONSTRATE, IN THE DIVISION'S OPINION, AN ADEQUATE
VOLUME OF NON-TOXIC MATERIAL TO BE AVAILABLE FROM THIS AREA FOR THE
RECLAMATION PURPOSES PROPOSED, ENERGY FUELS MINING COMPANY WILL PROMPTLY
COMMIT TO ADEQUATELY AMEND OR REPLACE, FROM OTHER ACCEPTABLE SOURCES, THE
VOLUME OF MATERIAL REQUIRED BY THE DIVISION.
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