2008-01-14_HYDROLOGY - M1978052

• Permit No: M1978052
• IBM Index Class Name: HYDROLOGY
• Doc Date: 1/14/2008
• Doc Name: Combined Replacement Plan
• From: DWR
• To: Applegate Group, Inc.
• Permit Index Doc Type: Hydrology Report
• Media Type: D
• Archive: No

Michelle L. Hatcher
January 12, 2008
Depletions
Paget
The total annual losses resulting from evaporation, water lost in product, dust control and
concrete batching are shown in the following table:
TABLE B -LOSSES
Site Name Evaporation
Losses
ac-ft Lost in
Product
ac-ft Dust
Control
ac-ft Concrete
Batching
ac-ft Total
(ac-ft)
Howe Pit 0 0 0 44.2 44.2
Tanabe Pit 0 0 0 0 0
Dunes Develo ment 0 0 0 0 0
Mann Lakes 6.94 0.6 3.92 0 11.5
Ft. Lu ton Pit 11.8 0 0 0 11.8
Riverbend O eration 0 0 0 0 0
Sta ecoach Sto Pro ert 2.8 0 1.5 0 4.3
TOTAL 21.5 0.6 5.4 44.2 71.7
A slurry wall has been installed around the Stagecoach Stop Property so that the site will
be sealed from the tributary groundwater. All process water for the Stagecoach Stop Property
will be pumped from well no. 63864-F which is located inside the mining permit boundary but
outside of the slurry wall. The water from the well will be pumped into a small lined wash pond
inside the slurry wall lined pit. The SWSP request assumes that the process water is 100%
consumed.
The mining sites are set back from the river, therefore, the depletions from the
operations were not assumed to be instantaneous. Operational and evaporative depletions at
the site were lagged to the stream system using a Glover analysis and the aquifer parameters
shown below:
Site Name X ft W ft T d/ft S ecific Yield
Howe Pit 350 12000 45000 0.2
Tanabe Pit 4200 6700 115000 0.2
Dunes Develo ment 2800 6700 115000 0.2
Mann Lakes 400 4450 45000 0.2
Sta ecoach Sto Pro ert 200 15000 45000 0.2
Ft. Lu ton Pit Stream De letion Factor of 300 da s was used
X-distance from well to river
W-distance from the aquifer boundary through the well to the river channel
T-transmissivity of the alluvial aquifer (in gallons per foot/day) between the welt and the river
The lagged mining depletions are shown in the attached Table 1.
Replacements
The proposed source of replacement water is fully consumable water leased from the
City of Aurora. The SWSP request submitted on August 30, 2007 also sought to use 25 shares
of Fulton Ditch water as a replacement source. The Fulton Ditch water was to be recharged into
Zigan Reservoir, which is a reclaimed gravel pit located in Section 35, Township 1 South, Range