GENERAL48586

• Permit No: C1982056
• IBM Index Class Name: General Documents
• Doc Date: 6/28/2000
• Doc Name: PROPOSED DECISION & FINDINGS OF COMPLIANCE FOR PR5
• From: Add Northern Mining District
• Permit Index Doc Type: FINDINGS
• Media Type: D
• Archive: No

d) Three hundred feet of anv public building, school, church. community or institutional buildinrz, or public
park (3.07.6('_)(dl(iii)(Bl);
e) Vne iwndred feet ofa cemetery (2.Oi.6(2)(d)\iii)(C));
t) The boundaries of any National Forest unless the required finding of compatibility has been made by the
Secretary of the U.S. Department of Agriculture (2.07.6(2)(d)(iii)(D));
~) One hundred feet of the outside right-of--way line of any public road except where mine access or haul
roads join such line, and excepting any roads for which the necessary approvals have been received,
notices published, public hearing opportunities provided, and written findings made.
PR-02 approved undermining a portion of Routt County Road No. 27 in Section 33 of TSN R86W and
Section 25 of TSN R87W. Routt County approved this undermining and subsidence of [he road and the
Division stipulated that the written approval from Routt County be submitted prior to any longwall mining
below the surface of the road. The Division published notice of a public hearing in the Steamboat Pilot on
July l6, 1992. No comments concerning the mining within 100 feet of the right-of-way were received
from the public. Warning signs were posted along the road in [he zone of subsidence. Subsidence and
rockfall due to mining in Panel 6 in the SW Mining District required that the operator re-design the
mitigative measures proposed originally under PR-02 to protect the use of County Road No. 27 in
Sections 33, TSN R86W and Section 2S of TSN, R87W. Technical revision 19 (TR-19) approved
constmction of a trench berm system approximately 4200 feet in length adjacent to County Road No. 27
to stop any rockfall prior to reaching the county road. Exhibit 7a, Stability Investigation of the
Twentymile Sandstone Cliff, and Exhibit 7f, Rockfall Hazard Assessment and Selection of Hazard Control
or Mitigation Measures, outline details with regard to the cliff, County Road No. 27 and required
mitigation measures. As a result of undermining the cliff along County Road No. 27 in Panels 7, 8 and 9
of the Southwest Mining District, substantial rockfall did occur. The trench/betm system along [he road,
in addition to slight road relocation, proved to be an effective and necessary measure to protect the safety
of the public users of [his road as numerous boulders were trapped in the trenchlberm system.
PR-03 approved undermining a significant portion of Routt County Road No. 33 in portions of Sections
14, 22, 23, 27, and 28, TSN, R86W. The Division published a notice on October 7, 1993 in the Steamboat
Pilot providing the opportunity for a public hearing concerning the undermining of approximately four (4)
miles of Routt County Road No. 33. These four miles of road lie within the area affected by longwall
panels 9R, 8R, 7R (PR-03), 6R and SR (PR04). There was no public response or concern voiced about
undermining of the road. The applicant received all necessary approvals from Routt County to undermine
County Road No. 33. Special Use Permit No. 92-233 issued by Routt County approved the undermining
and subsidence of County Road No. 33 as long as the conditions addressing appropriate road warning
signage, monitoring, and repairs are met by Twentymile Coal Company. Based on the above information,
the Division finds Twentymile Coal Company in compliance with Rule (2.07.6(2)(d)(iv)) for the
undermining of Routt County Road No. 33.
Approval of PR-04, April 20, 1998, allowed for continued mining in [he Eastern Mining District of
Longwall panels 6R through 2R. Only panels 6R and SR had an impact to Routt County Road No. 33.
Experience gained during subsidence of panels 9R through 7R demonstrated that traffic on County Road
No. 33 was not been interrupted as a result of the subsidence of the road. Subsidence of Longwall panels
6R and SR did not interrupt traffic on Routt County Road No. 33. Twentymile Coal Company maintained
warning signs., subsidence monitoring and repair to affected areas of the road during mining of Longwall
Panels SR and 6R. _
C:1JHB\C82056\PR05\PROS FINDINGS 62800.doc
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