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<br />temperature data indicate complexities in flow paths
<br />which are not fully understood, the program showed that
<br />an aquifer at approximatety 100 feet into the Morrison
<br />Formation was interconnected with the Scott, Marland,
<br />snd James Wells.
<br />
<br />Results of Cleaning and Plugging Wells
<br />
<br />The injection of 4,000 cubic feet of cement between
<br />1,000 and 1,350 feet at the Marland Intercept Well has
<br />significantly decreased recharge to the shallow aquifers
<br />in the vicinity of the Marland Well. The upper 1,500
<br />feet of the Scott Well annulus was sealed with 2,200
<br />cubic feet of cement and the upper Morrison aquifer in
<br />the James Well was sealed when that well 'II78S plugged
<br />with 400 cubic feet of cement. Water l~vels in all
<br />observation wells continued to decline and reductions in
<br />surface discharge were noted at several of the spring
<br />and seep statio~s since the plugging of the Scott,
<br />Marland, and James Wells. Insufficient data exist to
<br />distinguish between natural surface discharge fluctua-
<br />tions and discharge reductions due to plugging the
<br />wells; declines in observation well-water levels are in
<br />direct response to plugging the wells (Figure 2). Con-
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<br />tioued monitoring is necessary to follow the effects of
<br />plugging on the hydrologic system of the Dome.
<br />
<br />FUTURE ACTIVITIES
<br />
<br />A 3-year program is being considered to monitor changes
<br />in water levels, spring flows. and water quality. This
<br />monitoring progr~l would be reviewed each year to ensure
<br />that it is necessary and meeting objectives.
<br />
<br />A 3-year program is also being considered to continue
<br />monitoring the White River and creek flows in the Meeker
<br />D~e area. Measuring river flow and water quality above
<br />and below the Dome is the most pract lcal method of
<br />determining reductions in salt loading.
<br />
<br />Limited g~ologic mapping of the Meeker Dome will be con-
<br />tinued over the next year and the results reported in
<br />the Phase I Report. A detailed geologic map of the
<br />Dome's surface would be beneficial to better under-
<br />standing the role of surface fractures and jointing in
<br />movement of nearsurface water. The Draft Phase I Report
<br />should be completed by CH2M Hill during November 1982.
<br />
<br />
<br />OBSERVATION WELL
<br />MONITORING RESULTS
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<br />NO J F M AM J J AS 0 NO J F M
<br />/980 /981 1982
<br />
<br />FIGURE 2. OBsERVATION WELLS Sfrn A CONTINUING DECREASE IN WATER LEVELS SINCE THQ~708:kLLS WERE PLUGGED.
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