2011-03-22_HYDROLOGY - M1994005

• Permit No: M1994005
• IBM Index Class Name: HYDROLOGY
• Doc Date: 3/22/2011
• Doc Name: SEO complience letter
• From: Wright Water Engineers, Inc.
• To: DRMS
• Email Name: GRM
• Media Type: D
• Archive: No

Table 2
Current Evaporative Depletions, Lagged Return Flows and Augmentation Supply
United Companies - Colona Gravel Pit
(All Values in Acre-Feet unless otherwise noted)
Obligations Water Supply

Lagged
Evaporative
Depletions Lagged
Historical
Groundwater
Return Flows
Total
Obligation to
River Lagged
Historical
Consumptive
Use Lagged Post
Operation
Groundwater
Return Flows

otal

Water Owed to
River
Month (1) (2) (3) (4) (5) (6) (7)
October 1.2 8.1 9.3 5.7 8.4 14.0 0
November 1.0 6.9 7.9 4.2 7.1 11.3 0
December 0.8 6.0 6.8 3.4 6.2 9.5 0
January 0.7 5.2 5.9 2.8 5.4 8.3 0
February 0.6 5.2 5.8 2.5 5.3 7.7 0
March 0.5 7.2 7.7 2.1 7.1 9.2 0
April 0.7 10.8 11.4 1.9 10.5 12.4 0
May 0.8 12.8 13.6 2.4 12.5 14.9 0
June 1.1 13.1 14.1 4.1 12.9 17.0 0
Jul 1.3 12.6 13.9 6.0 12.5 18.6 0
August 1.3 11.9 13.2 7.1 11.9 19.1 0
,September 1.3 10.4 11.8 6.9 10.6 17.5 0
Annual Total 11.2 110.3 121.6 49.1 110.3 159.4 O
Notes: 1. Evaporative Depletions from 4.4 Acres of exposed groundwater lagged 2,000 feet from Centroid of Pit to Uncompaghre River.
2. Groundwater return flows lagged 1,915 feet from Centroid of Historically Irrigated Area to Uncompaghre River (50 percent of
Historical Diversions less HCU and Ditch Loss of 10 percent).
3. Sum of Column (1) and Column (2)
4. Diversions associated with Historical Consumptive Use lagged 2,000 feet to Uncompaghre River from Centroid of Pit.
5. Diversions historically returned to river via groundwater, lagged 2,000 feet to Uncompaghre River from Centroid of Pit (50
percent of Historical Diversions less HCU and Ditch Loss of 10 percent).
6. Sum of Column (4) and Column (5)
7. Column (3) less Column (6)
P:\061-052\000 - Colona\DRMS\ Wright Water Engineers, Inc. Des by: WCR
DRMS Ammended Tables March 2011_WCR_with_ice March 2011 Ckd by: PRF