2013-01-30_HYDROLOGY - M1978052

• Permit No: M1978052
• IBM Index Class Name: HYDROLOGY
• Doc Date: 1/30/2013
• Doc Name: Combined Replacement Plan
• From: OSE
• To: Bishop-Brogden Associates
• Permit Index Doc Type: Hydrology Report
• Email Name: BMK
• Media Type: D
• Archive: No

Site Name
X (ft)
W (ft)
T (gpd /ft)
Specific Yield
Howe Pit
2,400
5,900
45,000
0.2
Riverbend West
2,200
5,200
170,000
0.2
Riverbend East
2,700
5,000
80,000
0.2
Mr. Heintz & Ms. Wynne Page 3 of 7
MMM South Platte Combined Replacement Plan
January 28, 2013
0205187), 20317 -RR (WDID 0207417) and 20583 -R (WDID 0205190). All of the wells are located
within the gravel permit boundary in sections 18 and 19, Township 1 North, Range 66 West, 6 P.M.
All five wells are permitted for irrigation purposes and they are included in the Ground Water
Management Subdistrict of the Central Colorado Water Conservancy District ( "Central GMS ")
augmentation plan approved by the Division 1 Water Court in case no. 2002CW335. Lafarge obtained
new well permits to cover industrial uses at these wells as follows: 70135 -F (1657 -RR), 70136 -F
(20583 -R), 70137 -F (19944 -RR), 70138 -F (20317 -RR) and 70139 -F (2819 -FR). These well permits
remain under Lafarge ownership. If MMM now has ownership of these wells then a change of owner
form (Form GWS -11) should be submitted for each well. For the duration of this SWSP all metered
use from these wells will be accounted under this plan.
The water pumped for dust control is considered to be 100% consumptive. For the purpose of
this SWSP a 4% moisture loss was calculated to account for the resulting moisture content of
aggregate. Net evaporative depletions were calculated using a gross annual evaporation of 45 inches
per year per NOAA Technical Report NWS 33. This was reduced by applying a credit of 9.8 inches for
effective precipitation. As Riverbend East and West are near adjacent to each other these values were
used for both sites.
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. After a new
analysis by MMM, the Riverbend West site's X and W values were updated as well as the Riverbend
East site's W value. To maintain consistency with previous SWSPs, MMM kept all depletions that
occurred prior to this SWSP at the original lagging parameters but starting November 2012 are
applying the updated lagging parameters shown in Table C below.
TABLE C — IDS AWAS LAGGING PARAMETERS
X- distance from well to river, measured from the centroid of exposed area
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 well and the river
The lagged mining depletions are shown on attached Table 5.
Replacements
The proposed source of replacement water is (1) fully consumable water leased from the City of
Aurora, (2) dewatering credits associated with mining operations at the Riverbend East site as
explained in the following dewatering section.
The Applicant has an agreement with the City of Aurora ( "Aurora ") whereby Aurora will continue
to make releases of reusable effluent up to a maximum volume of 249 acre -feet for MMM's SWSPs.
MMM will request 120 acre -feet of fully consumable effluent in WY 2013, and 248.2 acre -feet of fully
consumable effluent in WY 2014. The applicant will account for a transit loss of 0.5% per mile from the
Metropolitan Waste Water Treatment Plant (WDID 0200700) to the gravel pit sites. The transit losses
for each site are shown in the table below. For purposes of the SWSP request, an average transit loss
of 11% shall be used.