HYDRO25043

• Permit No: M1983176
• IBM Index Class Name: Hydrology
• Doc Date: 8/1/2007
• Doc Name: Substitute Water Supply Plan
• From: OSE
• To: DRMS
• Media Type: D
• Archive: No

Ms. Katherin R. Griffin, E.I.
7!23/2007
Page 2 of 5
event the operator walks away from the project and/or;allows the dewatering
operation to discontinue.
The proposed source of replacement for this pit is froi~n a lease of 7.21
acre-feet of fully consumable efFluent, with the Consolidated Mutual Water
Company (Consolidated Water) and the water wi{{ be released from the Metro
Wastewater Treatment plant, which is located about 10 milers upstream of the
operation. A 0.5% per mile transit loss (5% overall loss) has~'been accounted for
in the replacement. The monthly depletions and replacemerrt requirements are
found on the attached annual accounting form.
Conditions of Approval
I hereby approve this substitute water supply plan, in accordance with Section
37-90-137(11), C.R.S., subject to the following conditions:
This SWSP acknowledges operation of the gravel pit between the
period of January 1, 2006 and December 31, 2007 (thE~,end of the
replacement water lease).
2. The total area of pond surface exposed after December, 31, 1980 for
the pit shall not exceed 2.41 acres. Should the total surface area
exposed exceed those amounts, an amendment will need to be filed
with this office. This approval acknowledges the mininit may have
been completed prior to the date of this letter and that the values of
water consumed in approval condition number 3 no longer apply
(except evaporation of exposed groundwater). However ~, the
applicant is still responsible for replacement of evaporative losses for
any exposed water surface (post December 31, 1980) %{ntil such time
an approved liner has been installed or an approved slurry trench has
been constructed around the pit area.
3. All pumping for dust control and dewatering discharges,to the South
Platte River shall be measured in a manner acceptable 4o the division
engineer. The losses associated with this mining operation must not
exceed a total of 6.86 acre-feet annually for 2006 and 3.84 acre-feet
for 2007 for the duration of this permit approval. These~losses include
4.14 acre-feet of evaporation from the proposed expos~lre of 2.41
acres of groundwater, 6.08 acre-feet of water used for dust
suppression and 2.64 acre-feet of water lost in 90,000 gins of mined
aggregate for 2006 and 3.84 acre-feet of evaporative louses for 2007.
Should the annual losses at the site exceed 6.86 acre-feet prior to the
expiration date of this plan, an amendment will need to lie filed.
4. The Water Commissioner responsible for the administration of this
plan is Mr. Robert Stahl, 9378 WCR 25, Fort Lupton, CC180621,
phone no. [phone]. The applicant shall maintain daily records