Buchanan-Lyndon B. Johnson Lakes HUC8 12090201
A 3,289 km² sub-basin of the Texas-Gulf region in TX. Drought coverage is from the US Drought Monitor (map of 2026-09-01); streamflow classes place each USGS gauge's latest reading against its own day-of-year record.
Health score
67
Moderate
Drought index
109
Moderate
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
50%
of 2 reporting
Median flow
22%
p19 of record
Water assets
1,060
105 springs · 209 wells
USGS gauges (2)
- Sandy Ck nr Kingsland, TX081520000 cfsp10 · below normal
- Colorado Rv nr San Saba, TX0814700054 cfsp28 · normal
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 109 | 0 | 1/2 | p19 |
Top water assets
- 67Wirtz Damreservoir
- 67Buchanan Damreservoir
- 66Lcra Inks Damreservoir
- 66Indian Damreservoir
- 66Owl Hollow Damreservoir
- 65Sandy Creekriver
- 65South Fork Morgan Creekriver
- 65Coal Creekriver
- 65Horseshoe Bay West Dam Creservoir
- 65Colorado Riverriver