GENERAL42563

• Permit No: C1980003
• IBM Index Class Name: General Documents
• Doc Date: 12/27/1984
• Doc Name: Midterm Review Findings Document
• Permit Index Doc Type: Findings
• Media Type: D
• Archive: No

-4-

2. Hydrologic Balance: Ground and Surface Water
a. The permittee has not been submitting ground and surface water
monitoring data as required. Therefore, the Division has not
been able to assess whether any unpredicted impacts have
occurred at the mine. Specifically, H-G needs to submit the
following information collected to date, and maintain the
submittal frequencies noted:
~/ 1. Sediment pond quarterly self inspections for the third
quarter of 1984; and on a quarterly basis thereafter.
2. Water monitoring reports for the surface water monitoring
r ~ program from 1981 to date in accordance with 2.05.6
n
~ll'z
` (3)(.6)(iii) of the permit application, to be submitted
r
/
~ emi-annually.
s
l!
t/j. Water monitoring reports for the ground w ater monitoring
program from the second half of 1982 to date in accordance with
2.05.6(3)(6)(iii) of the permit application, to be submitted as
data is collected.
~u ~v~~"
~~ ,~ b~~
1 n~
~'1 ~~(rIYS
~l~~S ~ ~ ~
4. Sediment level surveys of all sediment ponds from 1982 to
date, in accordance with 2.05.3(4) Appendix E of the permit
application, to be submitted annually after survey by a P.E.
~~ s
H-G has requested that all sediment ponds be retained as stack
ponds after mining. The Division is required to make a finding
regarding the designs of the structures and the appropriateness
of retaining them to serve the post-mining land use. Prior to
the Division approving the retention of the ponds, H-G needs to
submit all information required by Rule 4.05.9 regarding the
retention of the ponds.
~! H-G needs to submit any final decisions or actions regarding
their application for water rights for water retained in the
sediment ponds at the mine and load-out.
/H. Within the application H-G has provided a number of certified
renderings of the sediment ponds. As in the case of the haul
roads earlier this year, the Division needs to be assured that
all ponds have been constructed as approved per the designs in
_
drt the permit. If the renderings represent "as built"
_~.
~`'S configurations of the ponds, a letter from your Professional
~„s° Engineer to that effect would suffice to satisfy the Division
N'"~
F
(please see Attachment I). If this is not the case, H-G will
~~'~` need to provide a certification consistent with the
requirements of the Division (see July 13, 1984, Policy Memo
from the Division).
3. Vegetation/Revegetation
a. Independent MLRD investigations of revegetated areas at the
Hayden Gulch Mine have aroused concern that H-G may not be