HYDRO31293

• Permit No: C1980005
• IBM Index Class Name: Hydrology
• Doc Date: 3/31/1988
• Doc Name: 1st Qtr 1988 Review Letter
• From: MRLD
• To: PEABODY COAL CO
• Permit Index Doc Type: SEDIMENT POND INSPECTIONS
• Media Type: D
• Archive: No

III IIIIIIIIIIIIIIII
999
STATE OF COLORADO
Roy Romer, Governor
DEPARTMENT OF NATURAL RESOURCES
MINED LAND RECLAMATION DIVISION
FRED R. BANTA, Director
March 31, 1988
Mr. Reynold P. Armijo
Peabody Coal Company
Seneca Mine
P. O. Drawer D
Hayden, Colorado 81639
Re: Seneca II and Nucla Mines Quarterly Sediment Pond Inspections,
Pe~rlit C-80-005 and C-81-008, Respectively.
Dean-1~4F-C~e-
We have reviewed the First Quarter, 1988 inspection reports and our previous
comment letter of January 26, 1988. Below are some concerns we have, based
upon this review.
Point 2 of our January 26, 1988 letter pertained to the need for Peabody
to insure non-clogging dewatering devices are installed on the various
discharge point of ponds 001, 002, 004, 005, and 006 at Nucla. The basis
for this is that the approved designs requiring non-clogging dewatering
devices. A review of the March 16, 1988 inspection reports indicates
that trash racks or non-clogging dewatering devices have not been
installed on the principal spillways of ponds 002, 004, 005 and 006.
Since Peabody was previously notified of this requirement, the Division
will take an enforcement action during the April, 1988 inspection if the
trash racks or non-clogging dewatering devices are not installed on all
of the ponds requiring these devices.
The inspection report for pond 003 at Nucla specifies that this will he
the last inspection since the Division granted a variance during Permit
Revision No. 1. A review of Volume 3, Pages 7-86; Volume 3, Appendix
7-1, Page 7-1-9; and the Findings Document of April 2, 1987, pages 11 and
12 does not support this claim. The variance that was granted pertained
to the design requirements of Rule 4.05.6 based upon the exemptions
allowed under Rule 4.05.2(31. No variance was granted from the need to
perform quarterly sediment pond inspections since pond 003 is a ponding
structure. Therefore, quarterly sediment pond inspections of pond 003
will need to continue as in the past.
423 Centennial Building, 1313 Sherman Street Denver, Colorado 80203-2273 Tel. [phone]