REV09292

• Permit No: C1981013
• IBM Index Class Name: Revision
• Doc Date: 3/24/1994
• Doc Name: RESPONSES TO LETTERS OF FEBRUARY 22 1994 AND FEBRUARY 24 1994 BASIN RESOURCES INC THE GOLDEN EAGLE
• From: DMG
• To: ROBERT F T KRASSA
• Type & Sequence: RN2
• Media Type: D
• Archive: No

Mr. Robert F. T. ICrassa -4- March 24, 1994
significant error, in that for a depth of 750 feet from the surface to the coal seam, a
true 15° angle of draw would produce a surface subsidence effect 201 feet from
beyond the edge of the underground workings. Using an angle of 15° in the diagram
on page 5, the extent of surface subsidence effects from the edge of the underground
workings would extend 2799 feet, which in actuality corresponds to a tnie angle of
draw of 75°.
Letter dated February 25. 1994
The Division is aware of the possibility of strucwres being built within
Rancho Escondido after the issuance of this permit. Subsidence control plans
developed pursuant to Rule 2.05.6(6)(b)(iii)(B) are, however, developed only after the
"description of worst possible consequences" required pursuant to 2.05.6(6)(b)
determines that subsidence could cause material damage or diminution of reasonably
foreseeable use of structures and renewable resourre lands (2.05.6(6)(b)(i)). )f
stnudures or renewable resource lands do not exist within the area of subsidence
effects at the time of the preparation of the description of worst possible '
consequences, or, if they do, Urey would not be expected to experience material
damage or diminution of reasonably foreseeable use;. then. an applicant would not have
to prepare a subsidence control plan as. described in 2.05.6(6)(f).
In the case of the Golden Eagle Mine, however, Basin Resources and the Division
have agreed that Basin will develop a control plan for any new structure built after the
permit is issued if mine-related subsidence `could cause material damage or
S-r~ ~ diminution of reasonably foreseeable .use.of such structures`T as described -in
2.05.6(6)(b)(i). Basin realizes its need for compliaace with State statutes regarding
development of subsidence control plans, but also recognizes that these plans aren't
required if structures or renewable resource lands don't exist within the area to be
subsided. The Division believes that the comments supplied by the operator are the
best way to document the operator's recognition of potential future compliance issues
regarding mitigation of subsidence-related effects, without limiting now what the level
of that subsidence mitigation might be.
2. Please provide the ownership information you believe is incorrect. This information
/~1 /Z should be current to no later than January 21, 1994, the date of the Division's
proposed decision to renew the Golden Eagle permit.
3. Basin Resources has submitted a revised structure inventory and structure inventory
~~ P map. Please let us Imow what other materials you believe have not been submitted by
Basin Resources. Please also let us ]mow whether you have reviewed the newly
submitted information, and what issues, if any, you have regarding its adequacy.
4. You are correct in commenting that Basin Resources' post-mining land use map
M R identifies post-mining land uses solely for the disturbed areas associated with Basin's