WSP00497

• File Number: 8443.400
• Description: Narrows Project - Reports
• State: CO
• Basin: South Platte
• Water Division: 1
• Date: 8/1/1966
• Author: US DoI BoR
• Title: Narrows Unit Colorado South Platte Division Missouri River Basin Project Appendix II - Hydrology
• Water Supply Pro - Doc Type: Report/Study

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Table 1. Historic Water Utilization Summary
for the 23 I~jor Ditch Systems

Historic River Headgate Supply
Historic Farm Headgate Surface Supply
Historic Farm Pump Supply
Total Historic Farm Headgate Supply

Historic Farm Headgate Supply - 6w land
Historic Farm Headgate Supply - Class 1, 2, & 3
Farm Headgate Requirement - Class 1, 2, & 3 land
Farm Headgate Shortage - Class 1, 2, & 3 land
Farm Headgate Shortage on irrigable non-irrigated land

Total Farm Shortage on all Class 1, 2, & 3
Total River Headgate Shortage on all Class 1, 2, & 3

Acre-Feet

346,300
164,200
86,900
251,100

31,700
219,400
290,900
71,500
41,700

113,200
182,800

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(,)
C,)
OJ
Producti ve ('-)
Acres Acre-feet per Acre
156,501 2.22
156,501 1.05
156,501 .55
156,501 l.bO
21,908 1.45
13l+,593 1.63 ,y
134,593 2.16 ~
134,593 0.53
19,591 2.13
15l+,184 0.13
154,184 1.18

~ Under each ditch, the class 6w land received the same supply as did the historically irrigated class 1,
2, & 3 land. However, because each ditch had a different supply and because a greater proportion of
6w land is found under ditches with greater shortages, the average supply for all 6w land is less
than the average supply for the historically irrigated class 1, 2, and 3 land.

EI The historically irrigated class 1, 2, & 3 land has a greater requirement, on average, than does the
irrigable non-irrigated land because a greater proportion of the historically irrigated land is in
Subbasin B which has a higher requirement than Subbasin C.