Figure: 30 TAC §298.330(e)(4)

United States Geological Survey Gage 08127000, Elm Creek at Ballinger
Season Hydrologic
Condition		 Subsistence Base Small
Seasonal Pulse
(2 per season)		 Large
Seasonal Pulse
(1 per season)		 Annual
Pulse
Winter Severe 1 cfs 1 cfs Trigger:
10 cfs
Volume:
71 af
Duration:
10 days		 Trigger:
40 cfs
Volume:
270 af
Duration:
1 day		 Trigger:
1,900 cfs
Volume:
7,200 af
Duration:
18 days
Winter Dry N/A 1 cfs
Winter Average N/A 1 cfs
Winter Wet N/A 4 cfs
Spring Severe 1 cfs 1 cfs Trigger:
380 cfs
Volume:
1,400 af
Duration:
10 days		 Trigger:
1,000 cfs
Volume:
3,800 af
Duration:
12 days
Spring Dry N/A 1 cfs
Spring Average N/A 1 cfs
Spring Wet N/A 5 cfs
Summer Severe 1 cfs 1 cfs Trigger:
6 cfs
Volume:
25 af
Duration:
6 days		 Trigger:
74 cfs
Volume:
300 af
Duration:
9 days
Summer Dry N/A 1 cfs
Summer Average N/A 1 cfs
Summer Wet N/A 1 cfs
Fall Severe 1 cfs 1 cfs Trigger:
10 cfs
Volume:
46 af
Duration:
9 days		 Trigger:
190 cfs
Volume:
850 af
Duration:
15 days
Fall Dry N/A 1 cfs
Fall Average N/A 1 cfs
Fall Wet N/A 1 cfs

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