PERMFILE136495

• Permit No: C1981044
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: EXHIBIT 30 1985 MINE INFLOW STUDY
• Media Type: D
• Archive: No

• Sampling
Station _~ EC Temp(°C) Flow(gpm)
10 8.3 1,560 14 see note
11 8.3 1,728 13 24.5
12 6.9 2,340 14 2.2
471.6 gpm
NOTE: Sump in 9th East was being pumped and discharging through 4" pipe -
. Flow not measureable.
A comparison of Tables 3, 4 and 5 reveals that some of the mine inflow
cannot be measured directly. This is due to the fact that parts of the
mine are sealed or flooded and cannot be observed. Using the data from
Table 3 and comparing it against the data presented in Table 5,
approximately 261 gpm cannot be mearsured. It is assumed this is
associated with sealed and flooded areas of the mine.
1.6 Conclusions
The study reveals that conditions within the mine are remaining
essentially the same as during the prior two years. That is the eastern
portion of the mine is relatively dry, while the western portion of the
• mine produces the majority of the flow. The flow is associated with the
same areas as described in the prior study.
The fault system west side of the mine is producing water at about the
same rate as measured during the previous year. Although the flow has
decreased from prior years. It is approximately 46 gpm less this year.
This data indicates that the inflow has not changed appreciably since May,
1983. The field parameters measurement obtained from the water flowing
from the fault and west side of the mine is essentially the same as prior
years. The reasons for the difference in water quality between the Trout
Creek sandstone water and the fault water has been explained previously.
It appears the source of water to the fault is from aquifer(s) below the
coal seams. It is potulated that the Trout Creek sandstone could be the
source of,w,~~er for the 2 west fault. The water levels obtained from the
No. 5 Minindicate that the water level is remaining relatively stable.
From this it appears the inflow from the fault is approximately a
steady-state condition. The water levels in the well remain about 6 feet
below grade and have been maintained this level for about a year.
A study of the results indicate that a number of uncontrollable variables,
both in the ground water system itself (i.e. modified local gradients),
and in mine conditions (flooded or sealed areas) manifest themselves
during the study. The resulting variation points out the difficulty in
conducting inflow studies on an annual basis to address the MLRD's
• contention that it is imperative to identify what areas of the mine are
drying up or have started producing water. The inflow predictions Empire
Energy made in the permit application are reasonable, and Empire Energy
provided for an approach for conducting additional inflow studies if