2014-06-18_HYDROLOGY - M1977439

• Permit No: M1977439
• 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 1
Martin Marietta Materials
North Taft Hill Expansion Area
Evaporative Consumptive Use
Percent of Gross Lake Effective Net Lake Total Lake Lagged
Month Annual Evaporation Precipitation Precipitation Evaporation Evaporation Depletions
Evaporation (ft) (in) (ft) (acre-ft/acre) (acre-feet) (acre-feet)
(A) B) (C D E (F) G)
Jan-14 3.0% 0.10 0.36 0.02 0.00 0.00 0.13
Feb-14 3.5% 0.11 0.48 0.03 0.00 0.00 0.05
Mar-14 5.5% 0.17 1.18 0.07 0.11 0.79 0.31
Apr-14 9.0% 0.29 1.97 0.11 0.17 1.28 0.77
Ma -14 12.0% 0.38 2.74 0.16 0.22 1.66 1.22
Jun-14 14.5% 0.46 1.83 0.11 0.35 2.65 1.84
Jul-14 15.0% 0.49 1.62 0.09 0.38 2.96 2.40
A« -14 13.5% 0.43 1.42 0.08 0.34 2.59 2.59
Sep-14 10.0% 0.32 1.27 0.07 0.24 1.82 2.31
Oct-14 7.0% 0 22 1.13 0.07 0.16 1.17 1.78
Nov-14 4.0% 0.13 0.59 0.03 0.09 0.69 1a4
Dee-14 3.0% 0.10 0.49 1 0.03 1 0.00 1 0.00 1 0.66
Total 100% 3.17 15.08 1 0.88 1 2.06 15.52 15.30
Total Exposed Water Surface= 7.52 acres within current permit boundary.
Annual Precipitation= 15.5 inches -Based on Western Regional Climate Center Fort Collins,CO Station(050035)
Gross Annual Evaporation= 38 inches-Taken from NOAA Technical Report NWS 33
Notes:
(A)Based upon General Guidelines for Substitute Water Supply Plans for Sand and Gravel Pits.
(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)/12.
(E)Net lake evaporation from exposed water surfaces=(B)-(D),there is no evaporation December-February due to below-freezing average
monthly temperatures.
(F)Total lake evaporation from exposed water surfaces=(E)*Total Exposed Water Surface.Area based upon review of aerial photography and
discussion with operators.
(G)Lagging calculations were based on the following parameters:
Distance from stream= 1,600 ft,Transmissivity= 160,000 gpd/ft,Specific Yield=0.2,No-flow Boundary=2900 ft
Lagged depletions at the site include historical mining depletions and current and past evaporative depletions.
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