Figure: 30 TAC §298.330(e)(1)

United States Geological Survey Gage 08123850, Colorado River above Silver
Season Hydrologic
Condition		 Subsistence Base Small
Seasonal
Pulse
(2 per
season)		 Large
Seasonal
Pulse
(1 per
season)		 Annual
Pulse
Winter Severe 1 cfs 2 cfs Trigger:
18 cfs
Volume:
120 af
Duration:
13 days		 Trigger:
42 cfs
Volume:
300 af
Duration:
15 days		 Trigger:
3,000 cfs
Volume:
13,600 af
Duration:
17 days
Winter Dry N/A 2 cfs
Winter Average N/A 4 cfs
Winter Wet N/A 7 cfs
Spring Severe 1 cfs 2 cfs Trigger:
600 cfs
Volume:
2,500 af
Duration:
9 days		 Trigger:
1,800 cfs
Volume:
7,900 af
Duration:
11 days
Spring Dry N/A 2  cfs
Spring Average N/A 5 cfs
Spring Wet N/A 12 cfs
Summer Severe 1 cfs 1 cfs Trigger:
100 cfs
Volume:
350 af
Duration:
6 days		 Trigger:
330 cfs
Volume:
1,400 af
Duration:
9 days
Summer Dry N/A 1 cfs
Summer Average N/A 3 cfs
Summer Wet N/A 8 cfs
Fall Severe 1 cfs 1 cfs Trigger:
100 cfs
Volume:
400 af
Duration:
6 days		 Trigger:
430 cfs
Volume:
1,800 af
Duration:
9 days
Fall Dry N/A 1 cfs
Fall Average N/A 4 cfs
Fall Wet N/A 10 cfs

cfs = cubic feet per second
af = acre-feet
N/A = not applicable