2008-10-15_HYDROLOGY - M1997054

• Permit No: M1997054
• IBM Index Class Name: HYDROLOGY
• Doc Date: 10/15/2008
• Doc Name: Substitute Water Supply Plan
• From: OSE
• To: Applegate Group, Inc.
• Permit Index Doc Type: Hydrology Report
• Media Type: D
• Archive: No

Table-1
Front Range Aggregates, LLC
Parkdale Project M-97-054
Substitute Supply Plan - Evaporative Losses
Irl 171
Applegate
Job #: OS-12
131
(4) (5) (6)

Month Percent of
Annual
Evaporation Gross Lake
Evaporation
(ft)
Preciptation
(in) Effective
Preciptation
(ft) Net Lake
Evaporation
(acre-ft/acre) Total Lake
Evaporation
(ac-ft)
Apr 9.0% 0.3 1.5 0.1 0.3 0.4
May 12.0% 0.5 1.6 0.1 0.4 0.6
June 14.5% 0.6 1.2 0.1 0.5 0.8
July 15.0% 0.6 1.9 0.1 0.5 0.7
Aug 13.5% 0.5 1.9 0.1 0.4 0.6
Sept 10.0% 0.4 1.0 0.1 0.3 0.5
Oct 7.0% 0.3 0.8 0.0 0.2 0.4
Nov 4.0% 0.2 0.7 0.0 0.1 0.2
Dec 3.0% 0.1 0.5 0.0 0.1 0.1
Jan 3.0% 0.1 0.5 0.0 0.1 0.1
Feb 3.5% 0.1 0.4 0.0 0.1 0.2
Mar 5.5% 0.2 1.0 0.1 0.2 0.2
Total 100% 3.8 12.9 0.8 3.1 5.0
Exposed Water Surface = 1.6 acres -3 settling ponds, a gravel washing pond, and dewatering trenches
Annual Precipitation = 12.9 inches -Taken from Western Regional Climate Center
Gross Annual Evaporation = 46 inches -Taken from NOAH Technical Report NWS 33
Notes
(1) Taken from State Engineer's Guidelines for Gravel Pits at elevations below 6500 feet.
(2) Taken from NOAH Technical Report NWS 33 Map 3 and distributed monthly according to Percent of Annual Evaporation (1).
(3) From Western Regional Climate Center Canon City station #51294 (1948-2007).
(4) Effective Precipitation equals 70% of Average Annual Precipitation, 70%' (3).
(5) Gross Evaporation minus Effective Precipitation converted to units of feet, (2) - (4).
(6) Total Evaporative Loss is the product of Net Evaporation (5) and Exposed Water Surface.
Group, i.e.
Prepared By: Michelle Hatcher
Date: April 24, 200
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