2012-04-25_HYDROLOGY - M1977572

• Permit No: M1977572
• IBM Index Class Name: HYDROLOGY
• Doc Date: 4/25/2012
• Doc Name: CONSOLIDATED SUBSTITUTE WATER PLAN
• From: DWR
• To: BBA WATER CONSULTANTS
• Email Name: SJR
• Email Name: SJM
• Media Type: D
• Archive: No

Table 2
VALCO, INC.
S'WSP ACCOUNTLNG PROJECTION
Canon City East Pit
(all values in acre -feet unless otherwise indicated)
Month
• •erations
Exposed
Water Gravel Batch Plant
Surface Production Pumping
(ac (tons) (gallons)
1)
Net Water in
Evaporative Mined Batch Plant
De Ietions Gravel Pum in
4
(111
(k :11, 11)144 (la 11'
sX5 1 (
iIL
1
1
0
1,
k (1A1
.1
1 vt
0
16
4
An al Total
1
[3]
0
0
•
45.57
Re.lacement Re•uirement
Total
45.57
CC &OC Ditch Re •lacement
Total Flow Amount of
HCU Bypassed to CU claimed CU Credit CU Credit Excess
Available River •er month Measured Used CU Credit
8
10
[1l
12
[13]
38.34
33.56
4.78
PBWW Lease
Requested Required
Amount Amount
o)(11)
�1k old {11!(e)
14.29
12.01
Remaining
Depletions
( -) /Surplus
Credit ( +)
7.06
Notes: Shaded months correspond with projection data, non - shaded months correspond with actual data.
[1] Total exposed groundwater surface area in the pit. Increases to the July 2005 measured area are estimated by Valco.
[2] Total gravel mined below the groundwater table as reported by Valco.
[3] Well pumping measured with totalizer. Meter reading reported by Valco.
[4] Required evaporative replacement based upon the following: Equals ([1] - 15.4 ac) x 3.1 ft x monthly %.
15.40 ac = pre -1981 exposed groundwater surface area (does not require augmentation)
3.1 feet = annual net evaporation rate at the site
[5] Water in mined gravel is 4% by weight of the gravel produced. Equals [2] x (1/1359 af/ton of water) x 4 %.
[6] Well pumping converted to acre -feet. Equals [3]/(325,851 gal/af).
[7] Total depletions requiring replacement. Equals [4] + [5] + [6].
[8] Historic consumptive use credit from 25 Canon City and Oil Creek Ditch shares.
[9] Total flow measured in the CC &OC Ditch by flume on Valeo's property, bypassed to Arkansas River.
[ 10] The percent of water Valco will claim as CU from the total amount of water that flows through the ditch that month. Based on Blaney- Criddle analysis and historic in-igation records.
Actual consumptive use credit calculated from total water through flume in CC &OC Ditch.
[11] Measured Canon City and Oil Creek Ditch consumptive use credit used to augment Canon City East Pit depletions. Based on amount of total flow bypassed to river [9]; equal to [9] * [10].
[12] CU credit used equals the lesser of [7], [8] and [11].
[13] Excess Canon City and Oil Creek Ditch credits available for use at the Rocky Ford site. Equals the lesser of {[8] or [11]} - [12].
[14] Pueblo Board of Water Works scheduled release for Canon City East Pit.
[ 15] Required Pueblo Board of Water Works lease volume needed to replace remaining depletions. Equals [7] - [12].
[16] Remaining Depletions ( -) or Surplus Credit ( +) after accounting for replacement sources. Equals the lessor of {[8] or [11]} + [14] - [7].
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