2013-10-22_HYDROLOGY - M1977436

• Permit No: M1977436
• IBM Index Class Name: HYDROLOGY
• Doc Date: 10/22/2013
• Doc Name: SWSP
• From: OSE
• To: Bishop-Brogden Associates, Inc.
• Permit Index Doc Type: Hydrology Report
• Email Name: TAK
• Media Type: D
• Archive: No

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Notes:
[1 ] Total surface area of exposed ground water is conservatively projected to be 53.1 acres from August 2013 through July 2014 and 49.9 acres from
August 2014 through December 2014 (28 acres at North Tower Pit, 20.6 acres at Bromley Lakes Cell 2, 0.3 acres at Ready Mixed Pit 1!Bromley
Cell 3, and 4.3 acres at Arends, Rcinoeh), and Archuleta Pits from 3013 through July 2014 which will be back filled to no more than I acre by
August 2014).
[2] Gross evaporation rate equals 44.52 inches (3.71 ft) per year, based upon NOAH Evaporation Atlas. Monthly distribution based upon SB -120
Guidelines.
[31 Effective precipitation rate equals 70;0 of total precipitation, based upon average precipitation at the Brighton weather station.
141 Net evaporation equals 121.[3].
[5] Historical ET credits at the North Tower Pit from 7.4 acres of pasture grass using ground water at a depth of 4 feet (does not include an effective
precipitation credit)_
[61 Net evaporation equals the net evaporation volume minus the historical ET credits, [ I ] x [4]112 - (5]
[71 Production above the static ground water table or within the slurry wall liner at Ready Mixed Pit I /Bromley Cell 3 once the liner has been approved
by the State which requires 2% replacement water by weight, and production below the static ground water (GW) table which requires 4'.
replacement water by weight. Since the exact timing of production above the ground water table is not known, projections conservatively show all
production requiring 4% replacement,
(8) Wash water and aggregate moisture content equals 2 1a by weight or 4 10 by weight per column 7.
[9] Total site depletion equals [6] + [8).
(101 Lagged site depletion equals the depletion in column (9] lagged over 12 months plus depletions from previous lagging patterns.
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Table IA
Ready i flied Concrete
Company - Bromley Lakes Site
& north
Tower Pit
Depletion Analysis (August 2013 - December 2015)
Proposed SWSP Operations
(all values in acre -feet unless specified)
Exposed
Gross
Effective
Net Historical Net
Gravel Production
Aggregate
Total
Lagged
Ground
Evaporation
Precipitation
Evaporation North Evaporation
Requiring
Requiring
Moisture
Site
Site
Water Area
Rate
Rate
Rate Tosser Pit
2 1e Repl,
4% Repl.
Content
Depletion
Depletion
(acres)
(inches)
(inches)
(inches) ET Credits
(tons)
(tons)
Depletion
Month
I
2
3
4 5 6
[7 1
[81
191
10
Aug
53.1
6.01
1.2
4.8 0.6 20.5
0
160,000
4.7
25.2
35.0
Sep
53.1
4.45
0.9
3.6 0.4 15.4
0
160,000
4.7
20.1
21.6
C }ct
53.1
3.13
_ _ 0.5
2.6 0.2 11.4
0
140,000
4A
15.5
18.3
IN
Notes:
[1 ] Total surface area of exposed ground water is conservatively projected to be 53.1 acres from August 2013 through July 2014 and 49.9 acres from
August 2014 through December 2014 (28 acres at North Tower Pit, 20.6 acres at Bromley Lakes Cell 2, 0.3 acres at Ready Mixed Pit 1!Bromley
Cell 3, and 4.3 acres at Arends, Rcinoeh), and Archuleta Pits from 3013 through July 2014 which will be back filled to no more than I acre by
August 2014).
[2] Gross evaporation rate equals 44.52 inches (3.71 ft) per year, based upon NOAH Evaporation Atlas. Monthly distribution based upon SB -120
Guidelines.
[31 Effective precipitation rate equals 70;0 of total precipitation, based upon average precipitation at the Brighton weather station.
141 Net evaporation equals 121.[3].
[5] Historical ET credits at the North Tower Pit from 7.4 acres of pasture grass using ground water at a depth of 4 feet (does not include an effective
precipitation credit)_
[61 Net evaporation equals the net evaporation volume minus the historical ET credits, [ I ] x [4]112 - (5]
[71 Production above the static ground water table or within the slurry wall liner at Ready Mixed Pit I /Bromley Cell 3 once the liner has been approved
by the State which requires 2% replacement water by weight, and production below the static ground water (GW) table which requires 4'.
replacement water by weight. Since the exact timing of production above the ground water table is not known, projections conservatively show all
production requiring 4% replacement,
(8) Wash water and aggregate moisture content equals 2 1a by weight or 4 10 by weight per column 7.
[9] Total site depletion equals [6] + [8).
(101 Lagged site depletion equals the depletion in column (9] lagged over 12 months plus depletions from previous lagging patterns.
/l&, BBA
rV)
'V
C3
ca„
V'