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 4
VALCO, INC.
SWSP ACCOUNTING PROJECTION
Lamar East Pit
(all values in acre -feet unless otherwise indicated)
Month
Annual Total
0 erations
Exposed
Water
Surface
(ac)
Gravel
Production
(tons
0
Re.lacement Re.uirement
Net
Evaporative
De letions
Water in
Mined
Gravel
92.21
0.00
Total
A
kOW:t 5 .4
3
4
92.21
1 ro
8
9
Remaining
Depletions
( -) /Surplus
Credit +
10
0
LAWMA Credits
LAWMA LAWMA
Common Preferred
Credits Used Credits Used
6
7
8.00
84.21
PBWW Lease
Requested Required
Amount Amount
0.00
0.00
0.00
Notes: Shaded months correspond with projection data, non- shaded mouths 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] Required evaporative replacement based upon the following: Equals ([1] - 15.4 ac) x 3.1 ft x monthly%
13 20 ac = pre -1981 exposed groundwater surface area (does not require augmentation)
4.15 feet = annual net evaporation rate at the site
[4] Water in mined gravel is 4% by weight of the gravel produced. Equals [2] x (1/1359 af/ton of water) x 4 %.
[5] Total depletions requiring replacement. Equals [3] + [4].
[6] Consumptive use credit for 8 common LAWMA shares at 100% allocation is 8 af/yr, (based on 2011 allocation).
[7] Consumptive use credit for 90 preferred LAWMA shares is 90 af/yr. Equals greater of zero and [5] - [6].
[8] Pueblo Board of Water Works scheduled release for Rocky Ford East Pit.
[9] Required Pueblo Board of Water Works lease volume needed to replace remaining depletions. Equals greater of zero and [5] - [6] - [7].
[10] Remaining Depletions ( -) or Surplus Credit ( +) after accounting for replacement sources. Equals [6] + [7] + [8] - [5].