2013-05-29_HYDROLOGY - M1999120

• Permit No: M1999120
• IBM Index Class Name: HYDROLOGY
• Doc Date: 5/29/2013
• Doc Name: SWSP
• From: OSE
• To: Parsons Water Consulting, LLC
• Permit Index Doc Type: Hydrology Report
• Email Name: ECS
• Media Type: D
• Archive: No

Mr. Rick Parsons, P.E.
L.G. Everist Combined SWSP Amendment 1
Page 3 of 9
May 28, 2013
site will not authorize any additional use of ground water until the Applicant provides documentation that a
bond sufficient to cover lining or backfilling of each pit has been obtained. The current bond amount for
each pit is shown in Table C below.
TABLE C - DRMS Bonding
Site Name
DRMS #
Bond Amount
Notes
Lohmann Pit
M- 2001 -017
$665,800
Rinn Valley Pit
M- 1997 -093
$114,700
Bond to be reassessed with forthcoming
amendment.
Firestone Pit
M- 1996 -052
$509,900
2013
Fort Lupton Pit
M- 1999 -120
$2,002,400
2013
Lupton Meadows Pit
M- 2002 -104
N/A
Pit (and bond) now covered under
M- 1999 -120
Depletions
The depletions resulting from evaporation, water lost in product, dust control and concrete
production are shown in Table D below:
TABLE D - DEPLETION SUMMARY
Site Name
Evaporation
Loss
(ac -ft)
Product
Moisture Loss
(ac -ft)
Dust Control
( ) ac -ft
Concrete
Production
(ac -ft)
Total
Depletions
(ac -ft)
Total Net
Depletions " "*
(ac -ft)
2012
2013
2012
2013
2012
2013
2012
2013
2012
2013
2012
2013
Lohmann Pit
10.0
10.0
3.8
4.4
1.0
1.0
0.0
0.0
14.8
15.4
54.2
22.1
Rinn Valley Pit
14.1
14.1
13.9
14.6
1.0
1.0
12.3*
13.0 **
41.3
42.7
66.7
43.0
Firestone Pit
17.3
17.3
0.0
0.0
0.0
0.0
0.0
0.0
17.3
17.3
-17.3
-17.3
St. Wain Creek Net Depletions
138.2
82.3
Fort Lupton Pit
11.4
11.4
0.0
0.0
0.0
0.0
0.0
0.0
11.4
11.4
62.0
32.6
Lupton
Meadows Pit
17.9
17.9
31.6
32.9
1.0
1.0
0.0
0.0
50.5
51.8
73.4
53.3
South' Platte Rive_ r Net Depletions
135.4
85.9
" Based on 80,000 tons of concrete production and 50 gallons of water per ton of concrete
** Based on 85,000 tons of concrete production and 50 gallons of water per ton of concrete
The total net depletions include accretions credits or depletions from dewatering. The total net depletions for 2010 and 2011
for all pits were taken from Tables 8 and 11
The net evaporation for the Firestone Pit includes a credit of 0.60 acre -feet of consumptive use of
ground water associated with the partial subirrigation of the historically irrigated acreage. No other
phreatophyte credit was applied to the other sites. Computation of evaporation under this plan was
reduced during the ice covered periods. You have assumed the ice covered period to occur during the
months of December, January and February, based on average monthly temperatures less than 32 °F
taken from the Longmont 2ESE weather station for the Saint Wain Pits and Fort Lupton 2SE station for
the South Platte Pits. However, for the purpose of this SWSP, the Applicant shall replace the net
evaporation depletions from the exposed ground water surface area that may occur during the assumed