Lower Grand HUC8 08070300
A 2,059 km² sub-basin of the Lower Mississippi region in LA. 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
58
Moderate
Drought index
151
Moderate
Area in D2+
0%
0% exceptional (D4)
Gauges below normal
—
no gauges reporting
Median flow
—
of normal for the date
Water assets
1,722
0 springs · 1,530 wells
USGS gauges (3)
- Bayou Grosse Tete S. of I10 at Grosse Tete, LA0738142774 cfsno long-term record
- Choctaw Bayou at I-10 east of Grosse Tete, LA07381429no readingno long-term record
- Lower Grand River at Bayou Sorrel, LA07381450457 cfsno long-term record
Recent conditions
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-09-07 | 151 | 0 | — | — |
Top water assets
- 66False River Drainage Structurereservoir
- 65Bayou Clauseriver
- 65Morganza Settlement Pond Wwtpreservoir
- 65Trinity Canalriver
- 65Lower Grand River At Bayou Sorrel, Lariver
- 65Bayou Grosse Tete S. Of I10 At Grosse Tete, Lariver
- 65Bayou Portageriver
- 65Bayou Tigreriver
- 65Bayou Poydrasriver
- 65Bayou Poydrasriver