2014-06-18_HYDROLOGY - M2001051

• Permit No: M2001051
• IBM Index Class Name: Hydrology
• Doc Date: 6/18/2014
• Doc Name: SWSP
• From: DWR
• To: Bishop-Brogden Associates, Inc.
• Permit Index Doc Type: Hydrology Report
• Email Name: ECS
• Media Type: D
• Archive: No

Table 2
Martin Marietta Materials
Home Office Pit
Evaporative and Operational Consumptive Use
Eva orative Consumptive Use Operational Total Total
Percent of Gross Lake Effective Net Lake Net Exposed Total Lake Water Used for Consumptive Lagged
Month Annual Evaporation Precipitation Precipitation Evaporation Water Surface Evaporation Dust Control Use Depletions
Evaporation (ft) (in) (fq (acre-fUacre) (acre) (acre-feet) (acre-feet) (acre-feet) (acre-feet)
A B) C (D) (E) (F) (G) (H) (1) J
Jan-14 3.0% 0.10 0.36 0.02 0.00 15.70 0.00 0.46 0.46 1.39
Feb-14 3.5% 0.11 0.48 0.03 0.00 15.70 0.00 023 0.23 1.11
Mar-14 5.5% 0.17 1.18 0.07 0.11 15.70 1.65 1.53 3.19 2.45
Apr-14 9.0% 0.29 1.97 0.11 0.17 15.70 2.67 1.53 4.20 3.5 1
Mav-14 12.0% 0.38 2.74 0.16 0.22 15.70 3.46 4.60 8.06 5.82
Jun-14 14.5% 0.46 1.83 0.11 0.35 15.70 5.53 7.67 13.21 9.42
Jul-14 15.00.o 0.48 1.62 0.09 0.38 15.70 5.97 7.67 13.65 11.10
Aug-14 13.5% 1 0.43 1.42 0.08 0.34 15.70 5.41 7.67 13.08 11.43
Sep-14 10.0% 0.32 1.27 0.07 0.24 15.70 3.81 4.60 8.41 9.25
Oct-14 7.0% 0.22 1.13 0.07 0.16 15.70 2.45 1.84 4.29 6.33
Nov-14 4.0% 0.13 0.59 0.03 0.09 15.70 1.45 0.38 1.83 4.04
Dec-14 3.0% 0.10 0.49 0.03 0.00 15.70 0.00 0.38 0.38 2.49
Total 100% 3.17 15.08 1 0.88 2.06 - 32.40 38.59 70.99 68.33
Gross Exposed Water Surface= 240.9 acres within current permit boundary
Pre-1981 Water Surface= 100.0 acres within current permit boundary;do not require augmentation
Covered by Greeley/Tri-Districts- 125.2 acres within permit boundary;au&rmented in GreeleytTri-Districts SWSP
Net Exposed Water Surface= 15.7 acres within current and revised permit boundary
Annual Precipitation= 16.1 inches -Based on Western Regional Climate Center Fort Collins,CO Station(050035)
Gross Annual Evaporation= 38 inches -Taken from NOAA Technical Report N'WS 33
Notes:
(A)Based upon General Guidelines far Substitute 14aterSupplr Plans fin•Sand and Grenel Pity
(B)Gross lake evaporation=(A)*(Gross Annual Evaporation/12).
(C)Estimated using annual precipitation and monthly distribution of precipitation from the Western Regional Climate Center-Fort Collins.CO(050035).
(D)Effective precipitation=0.7*(C)'11
(E)Net lake evaporation from exposed water surfaces=(B)-(D),there is no evaporation December-February due to below-freezing average monthly temperatures.
(F)Net exposed surface area.equals gross surface area minus pre-81 surface area.
(G)Total lake evaporation Isom exposed water surfaces=(E)*(F).
(11)Water used for dust control at the Home Office Pit and Overland Ponds Site as estimated by,Martin Marietta Materials.
(1)Column(E)+Column(F).
(1)Lagging values calculated using following parameters:
Distance from stream=1000 ft,Transmissivity=160,000 gpd.'ft,Specific Yield=0.2,No-flow Boundary=6500 ft
Lagged depletions of the site include historical mining depletions and current and pact evaporative depletions.
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