PERMFILE107193

• Permit No: C1982056A
• IBM Index Class Name: Permit File
• Doc Date: 10/14/2007
• Section_Exhibit Name: 2.05.5 Postmining Land Uses
• Media Type: D
• Archive: Yes

Havdem-Gore Pass Line
The metal structures traverse all of the panels located in the Eastern Mining District. The monitoring plan
incorporated both visual inspections of the line and use of surveying equipment to detect movement of the
structures.
The powerline monitoring was triggered by the distance of the active longwall face from the structure. Monitoring,
as described below, began when the active face was within 500 feet of the structures and this intensive monitoring
concluded when the active longwall face was 1,500 feet past the structures. This process was repeated for each
panel within the Eastern Mining District (panels 9 Right through 7 Right).
Once the active face was within 500 feet of the powerline, daily visual inspections of the powerlines, which
includes verifying that the powerline has not come down on the county road or the raiUoad tracks, commenced and
continued until the face is 1,500 feet past it. The visual inspection provided a daily log on stability of the
powerlines and support structures. During the inspections, the condition of the structure was observed and changes
to the structures were noted accordingly. These included notes on integrity of bolts, support structures, insulators,
foundation soil contact areas, etc. These records are maintained at Twentymile's office.
Each of the footings of the metal structures within the active panel was surveyed daily. If the subsidence exceeds 1
inch, it was forwarded to the representative of the joint owners of the line. The survey schedule followed that given
for the above visual inspection program.
Wolcott Tap-Walcott Line
Twentymile notified Public Services company prior to undermining a structure on this line. The affected structures
were inspected prior to undermining to identify structural deficits, missing or damaged components, loose bolts,
and anything else that may affect the integrity of the structures during subsidence. Survey targets were installed on
the structure to monitor subsidence and to record displacement. A PSC patrolman inspected the structures
frequently during the subsidence period. Additionally, Twentymile conducted daily visual inspections per the
schedule detailed for the Hayden-Gore Pass line. After subsidence and horizontal displacement were completed,
the structure were inspected and repaired as necessary. Per PSC's request, targets were placed on each leg of the
impacted structures and surveyed per the following:
• Begin surveying when the face is 300' from the structures,
• Perform survey every two days until the longwall face is under the structure,
• Survey daily until the subsidence rate decreases to one inch per day,
• Survey weekly until the face is 1,400 feet past the structure.
After the longwall is past the required distance and subsidence has ceased, which shows subsidence has decreased
to one inch or less since the last survey, the surveying will be terminated.
Once the face has progressed 1,500 feet past the structure, monitoring activities were reduced. For the next 3
months after installation of the reduced monitoring program, visual and instrument surveys were done on a weekly
frequency. Upon completion of this segment of the program, monitoring was reduced to a monthly

A~Pdt®iJED APR 2 4 2000
Permit Renewal No. 3 2.05-190 12/10/98