PERMFILE58702

• Permit No: M1997054
• IBM Index Class Name: Permit File
• Section_Exhibit Name: EXHIBIT G WATER INFORMATION
• Media Type: D
• Archive: No

Exhibit C CMLRB 112 Permit Application
Agile Slone S~'stems. Inc.
• 7.0 Monitoring Wells and Spring Mapping
Monitoring wells were drilled along the southern boundary of the gravel deposit between
the limit of pit operations and the railroad right of way to define the water table and
gravel depths, conduct draw down/recharge pumping tests and prepare sites for
monitoring of water permeating from the mining azea into the Arkansas River. Two
wells incurred water at a static water table of about 40' from the main gravel terrace at
about the 5,790' elevation. The 2 dry new test wells showed gravel depths to 15' and
20'. No water table or water flows were encountered even at further depths to 35' and
75', respectively. A fourth well location was drilled at the extreme eastern end of the
gravel bank. This well incurred high water flow rates (40-50 gal/min) at depths
corresponding to 67' feet below the top of the main gravel terrace (5,790') while still in
gravel materials.
The well located within the permit area west of the "depot" buildings north of the Steer's
residence had a static water table 20' from the surface but with a limited recharge rate of
about 6.6 gallons per hour. This field observation indicates that the southwest comer of
the permit area may have an elevated saturated water table in the underlying gravel. The
only identified source for the elevated water table was concluded to be the long term
alfalfa field flood irrigation percolating the short distance to the Steer's spring. The 2
wells drilled east of the depot were both dry holes striking sedimentary bedrock
suggesting either a sedimentary bedrock uplift or prior erosion by the Arkansas River of
the area to the west. This uplift east of the Steer's spring may also help channel the
Tallahassee Creek irrigation water from the southwest azea alfalfa field towards the
Steer's spring.
The Tallahassee Creek and Currant Creek waters infiltrating the gravel bar appeaz to
move toward the south and east laterally above the gravel bedrock contact and exiting the
gravel terrace at a number of locations as springs along the north bank of the Arkansas
River but only in the southeastern part of the permit azea. 15 individual or multiple
spring sources were mapped and characterized by Azurite, Inc. (11/97) with an estimated
flow rate of 200 gpm. These springs flow directly into the Arkansas River and are not
utilized by any other water user.
Since mining will be mostly to the north of the sedimentary bedrock identified in the
southern part of the permit area and be limited to above the water table, gravel mining
will not affect these springs. Plant consumptive water use of Arkansas River water taken
from the river and not a well in the gravel bar may increase the water table supporting
these spring. Since the springs are down gradient from the plant, the springs are
considered similar in function to monitoring wells and will be considered as future water
sampling sites.
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