2025-09-10_HYDROLOGY - M1994005

• Permit No: M1994005
• IBM Index Class Name: Hydrology
• Doc Date: 9/10/2025
• Doc Name: Substitute Water Supply Plan
• From: Division of Water Resources
• To: DRMS
• Email Name: DMC
• Email Name: THM
• Media Type: D
• Archive: No

Appendix C2
Colona Pit
Current Operations Lagged Depletions Analysis
URF Inverted URF Current Operations Lagged Depletions
Depletions Lagged Depletions
1 0.12 12 0.03 (AF) (AF
2 0.25 11 0.03 Year Month A B
3 0.15 10 0.04 January 2.0
4 0.10 9 0.04 February 2.0
5 0.08 8 0.05 March 3.8
6 0.07 7 0.06 April 5.1
7 0.06 6 0:07 May 6.3
8 0.05 5 0.08 0 June 7.5
9 0.04 4 0.10 July 7.3
10 0.04 3 0.15 August 6.5
11 0.03 2 0.25 September 5.2
12 0.03 1 0.12 October 4.3
November 3.1
Notes: December 2.0
(1)See Appendix C1 for Colona Pit Unit Response Function January 2.0 3.9
(2)Year 0 depletions values assumed to equal current operations monthly February 2.0 3.6
depletions proposed under this SWSP. March 3.8 3.5
April 5.1 3.9
May 6.3 4.3
1 June 7.5 4.9
July 7.3 5.4
August 6.5 5.6
September 5.2 5.5
October 4.3 5.2
November 3.1 4.8
December 2.0 4.3
January 2.0 3.9
February 2.0 3.6
March 3.8 3.5
April 5.1 3.9
May 6.3 4.3
2 June 7.5 4.9
July 7.3 5.4
August 6.5 5.6
September 5.2 5.5
October 4.3 5.2
November 3.1 4.8
December 2.0 4.3
SWSP Period Total 110.1 110.1
P:\061-052\000-Colona\swsp\2025 SWSP Renewal\Tables\ Wright Water Engineers,Inc. DES:JBH
Colona 2025 SWSP tables 1-8.xlsx 6/9/2025 CH K:PR F