1977-09-29_PERMIT FILE - M1977315

Home Browse Search

1 and drawdown effects in the pit propagate radially outward to create a "cone of depression" of approximately ;-mile radius centered upon the pit. Impact on Neighboring Wells According to records provided by the State Division of Water Resources , there are no active irrigation wells with- in the anticipated cone of depression resulting from dewater- ing of the gravel pits . Well No. 51454, located in the SWh of the SE; of Section 35-6-66 is adjacent to the Greeley No. 3 Canal and has a registered depth of only 5 feet. It is unlikely that pit operations will affect this well , which apparently receives its supply from leakage from the canal . A list of all of the registered wells in the vicinity has been compiled by Lord and Associates , and a number of represen- tative wells will be identified for purposes of monitoring by t personnel from Bestway Paving Company. Ground water levels € in the wells will be measured on a periodic basis in order to determine whether the action of 'dewatering the pit is adversely affecting the yield of existing wells. Prior to the commencement of mining operations , it will be determined to what extent yield has historically fluctuated in response to natural variations in the local static level . Impact on Cache la Poudre River Both topographic and water table gradients in the local area indicate that ground water is moving very slightly - - =east of due north from the site. In the absence of specific geologic data and well logs , it is difficult to estimate the travel time between the site and the river. A travel-time estimate will be prepared at such time as it becomes. desire- . -able for purposes of administration by the State of Colorado. Dewatering of the pit in accordance with the projected mining plan will result in a depression of the ground water -4-