2008-03-03_PERMIT FILE - C2006085 ‎(2)‎

• Permit No: C2006085
• IBM Index Class Name: Permit File
• Doc Date: 3/3/2008
• Section_Exhibit Name: 2.04 Information on Environmental Resources
• Media Type: D
• Archive: No

The ChandlE~r Creek alluvium lies down gradient of the Chandler
Heights Subdivision, between the subdivision and the propose permit
boundary. (Regarding up gradient ground water, based on well
construction logs in the Chandler Heights vicinity, it is believed the
alluvium is not regionally saturated, therefore, up gradient water
quality will not be impacted.
According to Bishop-Brogden hydrologists, other than the Northfield
monitoring wells, no wells are constructed above the proposed mine
plan area. INo vicinity wells are completed within either the coal bed
draw down zone of 6150 feet or the rubble draw down zone of 1000
feet. The rubble zone was conservatively determined to be 100 feet
thick. Typical rubble zone is eight times the thickness of the removed
coal. In they case of the Ocean Wave, actual rubble zone is anticipated
to be approximately 50 feet thick. Eight vicinity wells were identified
as construci~ed above the 100 foot rubble zone which will be included
in the groundwater quantity monitoring program described in Exhibit
AB, Hydrologic Monitoring Plan.
The location of current groundwater rights and registered welts for the
permit and adjacent areas relevant to this application are shown in
Exhibit K ors the Northfield Mine Water Rights Map, and Northfield Mine
Registered '-Nells Map.
Surface Walter Information
Northfield's proposed permit area is contained within portions of a
general drainage basin which corresponds to the groundwater basin
previously discussed. The information presented for surface water
resources within this area has been obtained from ongoing monitoring
activities, a review of available geologic information, an water
rights/use documentation.
The mine and adjacent areas encompass the lower portions of the
Chandler Creek drainage and most of the relatively smaller Fawn
Hollow drainage. In addition, there are portions of several minor
drainages ~nrithin the permit area. All drainage in this area flows in
ephemeral ~~hannels, in a northeasterly direction, intercepting the
Arkansas River which is the major perennial drainage in this region.
The proposE~d permit area is located in a transition zone between the
Wet Mount~iins to the west and eastern plains. This is a transitional
type area where most of the drainages originate near the foothills at
the base of the mountains. Only Chandler Creek originates in the
steep, forested slopes of the main mountain range. As these drainages
2.04-23 Revised 11/05/07