Laserfiche WebLink
• Wade Overburden: During 2001, six Wadge Overburden wells (009-79-4, FBR-11-A, 006-82-74C, 9tM006, <br />008-77-58, and 93H001) required monitoring for water levels, field paaameters, and water quality parameters on <br />a semi-annual basis. Note that Wadge Overburden we1193M003 was abandoned in advance of mining on 8/4/00. <br />All monitoring requirements were completed at these sites with field meastvements obtained and water quality <br />samples collected during May and September. Tables 1 through 7 provide summaries of the 2001 Water Year <br />data collected at each site. Tables la through 7a provide period of record statistical summaries of collected data <br />at each site. Tables Ib through 76 provide period of record water level summaries for each site. Figures 3 <br />through 16 provide graphical representations of water levels and selected water quality parameters recorded at <br />each site. <br />The potentiometric surface in the Wadge Overburden generally slopes from south to north in monitored wells in <br />the vicinity of the TCC facilities, as shown by water levels in wells 009-79-4, 006-82-74C, and 91M006. During <br />2001, the water levels in well 009-79-4 (Figure 3) continue to be comparable to previous years going back to <br />1984. Well 006-82-74C (Figure 7) has returned levels typical of the eazly 1990s. Well 91M006 (Figure 9) <br />continues to show a steady decline in water level The potentiometric surface reflected by wells 93M001, and <br />FBR-11-A is generally observed to slope from southwest to northeast. Wells FBR-I I-A (Figure 5), and 93M001 <br />(Figure 13) continue to show declines in water level since the 1999 water yeaz. These declines were associated <br />with underground mining of the Eastern Mining District (EMD). Well 008-77-58 (Figure I1) has been <br />unaffected by mining and exhibits seasonal water level fluctuations. During 1998, this well experienced an <br />. unusually long seasonal decline, but since 1999 the previously established recovering water level trend resumed. <br />No anomalous water quality impacts attributable to mining were evident m data collected from Wadge <br />Overburden wells during 2001. At well 009-79-4 (Table 1), new minimum values were recorded for lab <br />conductivity, and dissolved manganese. At well FBR-11-A (Table 2), new maximum values were recorded for <br />nitrite. At well 006-82-74C (Table 3), a new maximum value was recorded for dissolved sodium. At well <br />91M006 (Table 4) elevated pH values continued to remain evident during 2001. New minimum values were <br />recorded during the year for dissolved calcium, dissolved magnesium, and dissolved sodium. At well 93M001 <br />(Table 6), new minimum values were recorded for field conductivity. The overall data is not indicative of <br />significant changes m trace metals concentrations. <br />Twentvmile Sandstone: During 2001, two wells, 006-BRDH-7 and 91H005, required monitoring for water <br />levels and field parameters on asemi-annual basis, and four wells, FBR-11-B, FBR-2, 97012TH and 97013TH, <br />required monitoring for water levels, field parameters, and water quality parameters on asemi-annual basis. All <br />monitoring requirements were completed at these sites during 2001. Tables 8 through 13 provide summaries of <br />the 2001 Water Year data collected at each site. Figures 17 through 28 provide graphical representations of water <br />levels and selected water quality parameters recorded at each site. <br />The potentiometric surface m the Twentymile Sandstone, as reflected by these six wells generally slopes from <br />• southwest to northeast. Water levels at wells 006-BRDH-7 (Figure 17), and 91M005 (Figure 19), remained <br />consistent with that of previous years, with no mine impacts appazent. FBR-11-B (Figure 21) exhibited a decline <br />in water level at the beginning of 2001, followed by a mazked rise in water level begimning in the middle of the <br />a <br />