2008-03-13_PERMIT FILE - C1992081A ‎(6)‎

• Permit No: C1992081A
• IBM Index Class Name: Permit File
• Doc Date: 3/13/2008
• Section_Exhibit Name: Tab 13 Hydrologic Monitoring Program
• Media Type: D
• Archive: Yes

The majority of the ground and surface water monitoring conducted by HGCC was
performed after the last of the coal stockpiled at the Loadout facility was shipped
out in 1986. From 1986 through 1992, the Loadout was inactive and all coal
storage, handling, and shipping activities were discontinued. Therefore, the data
collected from 1987 through 1992 was only minimally influenced by the small amount
of coal remaining on site (coal stockpile leachate) or activities associated with
the Loadout, and may be considered to reflect natural conditions. During 1994 and
1995, HGTI shipped approximately 170,000 tons of coal in 17 trains. A minimal
amount of coal remains in the loadout stacker stockpile.
•
HGTI abandoned monitor wells HGDALI and HGDAL2 in September 2007. The wells were
abandoned in accordance to the rules of the Colorado Division of Water Resources
and Rule 4.07.3(3) of the Rules and Regulations of the Mined Land Reclamation Board
for Coal Mining. Abandonment reports are presented in Tab 7.
Monitoring Site IDs. Different monitoring site name identifiers have been
established for all historic monitoring sites, as well as the new stream and
alluvial well monitoring sites. The following list provides the names (IDs)
utilized by HGTI and any corresponding historic names used.
Historic Names or Descriptions
Upstream Surface Water Monitoring Site
Downstream Surface Water Monitoring Site
"Replacement" Downstream Surface Water Monitoring Site
Upgradient Shallow
Downgradient Shallow
"Replacement" Downgradient Alluvial Well
"New" Upgradient Alluvial Well
CDPS Outfall OOlA (Truck Loop Pond)
CDPS Outfall 002A (Rail Loop Pond)
HGSD1
HGSD2
HGSD3
HGDALI (abandoned)
HGDAL2 (abandoned)
HGDAL3
HGDAL4
Truck Loop Pond
Rail Loop Pond
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Exhibits 12-1, Facilities Map, 12-2, Surface Water Control Plan Map, and Figure 13-
1, Monitoring Site Location Map, in Tabs 12 and 13 depict the locations of all
monitor sites and include HGTI's ID designations.
Operational Monitoring Program
Monitoring Rationale and Methodology. Considerable discussion occurred between
HGTI and CDMG staff regarding monitoring approaches, sites, and frequencies in
MR-16 5 Revised 11/07