REV11754

• Permit No: M1985029
• IBM Index Class Name: Revision
• Doc Date: 4/4/1990
• Doc Name: MEMO-FN M-85-029 RECLAMATION RESOURCES INC-ALMA PLACER PERMIT AMENDMENT-HYDROLOGIC REVIEW
• From: MLRD
• To: LARRY OEHLER
• Type & Sequence: AM1
• Media Type: D
• Archive: No

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Alma Placer -Permit No. M-85-029 w/
Hydrologic Review Comments ~,r,
Exhibit D - Mining Plan '•
1. Sediment and Drainage Controls for the Disturbed Area.
The application does not contain a sediment and drainage
the areas to be disturbed during mining. The Mining sequ
shown in Plate 4 indicates that areas to be mined occur o
percent slopes ranging in Length from 800 to 1200 feet.
mined range in size from approximately 18.5 to 40.4 acres
areas have been disturbed by previous mining activity dot
1872, the potential for erosion appears to be moderate to
of water for fugitive dust control during material handlii
as specified in Air Emissions Permit No. 85PA 102F, will
potential for erosion in these disturbed areas
In addition, the applicant has proposed the use of dozers
activities and a sluice box for processing ore bearing gra
methods were chosen over other mining methods in order to i
dust and hydrologic impacts.
concP.r^ fnr rtio~e ~~~~~+s. However, operating the Ross S1
require high pressure water, at a minimum of 10,000 gallon
Use of the sluice box, as proposed, also increases the pot
erosion during mining. District Wildlife Manager, James M
expressed concern in 1988 over discharge of high sediment
Middle Fork of the South Platte River and the direct impac
ed~ s~- ~,~~Irs ! ~ d

ntrol plan for
ce map as
6.5 to 8.5
eas to be
Since these
g back to
igh. The use;itk.J
activities, -rue ~
crease the '
or earthmoving ~fG.e
els. These ~ f~ ~ji
inimize noise, Y
ice Box will
per minute.
ntial for
Jones
oads into the
on fisheries.
Finally, the applicant has proposed no discharge of proces waters into
the Middle Fork of the South Platte River, thereby elimina ing the need
for an NPDES water discharge permit.
With these points in mind, the Division requests that Recl
Resources submit a sediment and drainage control plan in a
the hydrologic performance standards found in Rule 6.2 of
Rules and Regulations. A sediment and drainage control pl
implemented for each phase of disturbance, which will mini
erosion, The p
include engineering design and calculations for all man ma
to be implemented. The sediment and drainage control plan
minimum, include the following items: 1) grading plans or
plans to ensure that runoff water within disturbed areas w
the recycling ponds or an appropriately designed sediments
order to minimize impacts to fisheries in the Middle Fork
Platte, 2) engineering designs for recirculation ponds and
upgrading existing impoundments, and 3) intended use and d
dams shown in Plate 4.
motion
cordance with
he Minerals
n should be
ize surface
an should
e structures
should, at a
channel design
11 drain to
ion pond in
f the South
plans for
sign of the 5