2019-03-11_REPORT - C2009087

• Permit No: C2009087
• IBM Index Class Name: Report
• Doc Date: 3/11/2019
• Doc Name: Annual Reclamation Report
• From: Peabody Sage Creek Mining, LLC
• To: DRMS
• Annual Report Year: 2018
• Permit Index Doc Type: Annual Reclamation Report
• Email Name: TNL
• Media Type: D
• Archive: No

One A UM requires 810 lbs. of forage
1,560 lbs/acre (x) 2,541 acres = 3,963,960 lbs. of total forage produced
810 lbs. of forage (x) 960 AUM's = 777,600 lbs. of forage required;
777,600/3,963,960 x 100 = 19.6% utilization, well below the available forage
of the PSCM grazed reclaim area.
A lightning strike caused a brush -fire in late -September 2018, burning approximately 20
acres in T^N, R87W, Section 34, before it burned out.
SEDIMENTATION POND SURVEYS
PSCM is required by Permit to periodically monitor sedimentation ponds for sediment storage
capacities. Monitoring provides a sediment yield history and gives advance warning to operations
personnel when sediment clean-out work is required. Past data has shown reduced sediment transport
and deposition as vegetation has become established. The surveys from 2006 to present show
sediment storage capacities that are more than adequate. Because surface mined areas have been
reclaimed and have been revegetated for several years, the available storage capacities aren't expected
to change significantly. Additionally, potential sediment contributions to Pond 002 are buffered by the
lower sediment pond from newly disturbed areas associated with the underground mine.
Consistent with Rule 4.05.9(14), each pond is inspected annually by a qualified professional specialist
under the direction of a professional engineer or a qualified registered professional engineer. The
submitted reports comply with all requirements of Rule 4.05.9(15). Ponds are also visually inspected
quarterly by mine personnel. During these inspections, any significant observed change in sediment
storage or noticeable expansion of the sediment delta at the inlet to the pond are noted as indications of
conditions requiring pond maintenance. To assure that adequate sediment storage capacities are
maintained and taking into consideration the level of vegetative reestablishment on the reclaimed
areas, PSCM has committed to sediment and pond storage capacity surveys every 10 years beginning
in 2016. The table below has been updated to reflect the 2016 sediment and pond capacity survey.
The 2016 survey confirms that all ponds have sufficient active storage capacity to meet design
requirements.
The following table lists the latest surveyed capacities of PSCM sediment ponds:
PSCM also installed a new measuring flume at Pond 004 during 2015.
2018 ARR 6
TABLE
13.4jWlMENT
POND
CAPACIJ&
Pond
2006
2008
2010
2012-2014
2016 Minimum Allowable
Number
Capacity
Capacity
Capacity
Capacity
Capacity Water Storage
Pond
171.9
NA
NA
Not
177.7
84.6 ac.ft.
002
surveyed
Pond
3.7
NA
NA
Not
3.4
2.1 ac.ft.
003
surveyed
Pond
5.6
5.5
5.5
Not
8.1
3.0 ac.ft.
004
1
1
1 surveyed
PSCM also installed a new measuring flume at Pond 004 during 2015.
2018 ARR 6