1978-08-04_PERMIT FILE - M1977315

• Permit No: M1977315
• IBM Index Class Name: Permit File
• Doc Date: 8/4/1978
• Doc Name: IN THE DISTRICT COURT IN AND FOR WATER DIVISION 1 STATE OF COLORADO CASE W-8640-77
• Media Type: D
• Archive: No

by means of a cutoff trench around the pit with the drainage
water being diverted from the site in either of two ways :
( i ) Pumping into the storm sewer of the City of
Greeley located on the northeast corner of
the property . Pit drainage water will then
be conducted via the storm sewer to the Cache
La Poudre River at a point one mile north of
the subject tract of land.
( ii ) Returning the water immediately to the
aquifer by means of recharge wells along the
north side of the site .
e
With either procedure , the dewatering operation will lower the
water table in the pit to the bedrock elevation and will permit
dry-process extraction of the remaining portion of the gravel
down to the bedrock elevation.
d. The extraction of gravel from the site will result in a
substantial lowering of the ground level in the mine area as
overburden material is replaced in the pits after extraction is
completed. After the removal of the gravel , the parcel will of
necessity include a lake which is projected to have a water
surface area of approximately 14 acres .
e . Dewatering the pit will create a ground water
depression which will migrate in an northeasterly direction to
the Cache La Poudre River. The gain to the Cache La Poudre
River which results from return of the water drained from the
pit will exactly equal any depletion to the stream, and the
precise impact on streamflow will depend upon which technique
has been utilized to return the drainage water to the stream:
( i ) Recharge wells would return the pit water
immediately to the ground water formation at
a rate exactly equal and opposite to the
depletion caused by pumping. There would be
no net impact, either positive or negative ,
on the rate of flow in the Cache La Poudre
River.
-3-
ate.